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Elite on the BBC Micro and NES

A-Z index of the source code

[NES version]

This index contains every subroutine, entry point, variable, workspace and macro that appears in the source code for the NES version of Elite, sorted alphabetically.

NameCategoryDescription
ABORT (Bank 0)DashboardDisarm missiles and update the dashboard indicators
ABORT2 (Bank 0)DashboardSet/unset the lock target for a missile and update the dashboard
ACT (Bank 7)Maths (Geometry)Arctan table
ADD (Bank 7)Maths (Arithmetic)Calculate (A X) = (A P) + (S R)
ADD_CYCLES (Common)Drawing the screenAdd a specified number to the cycle count
ADD_CYCLES_CLC (Common)Drawing the screenAdd a specified number to the cycle count
addr (Common)Workspace variable Temporary storage, used in a number of places to hold an address
alertColours (Bank 7)StatusColours for the background of the commander image to show the status condition when we are not looking at the space view
allowInSystemJump (Common)Workspace variable Bits 6 and 7 record whether it is safe to perform an in-system jump
ALP1 (Common)Workspace variable Magnitude of the roll angle alpha, i.e. |alpha|, which is a positive value between 0 and 31
ALP2 (Common)Workspace variable Bit 7 of ALP2 = sign of the roll angle in ALPHA
ALPHA (Common)Workspace variable The current roll angle alpha, which is reduced from JSTX to a sign-magnitude value between -31 and +31
ALTIT (Common)Workspace variable Our altitude above the surface of the planet or sun
ANGRY (Bank 0)TacticsMake a ship hostile
antilog (Bank 7)Maths (Arithmetic)Binary antilogarithm table
antilogODD (Bank 7)Maths (Arithmetic)Binary antilogarithm table
ApplyEnvelopeNOISE (Bank 6)SoundApply volume and pitch changes to the NOISE channel
ApplyEnvelopeSQ1 (Bank 6)SoundApply volume and pitch changes to the SQ1 channel
ApplyEnvelopeSQ2 (Bank 6)SoundApply volume and pitch changes to the SQ2 channel
ApplyEnvelopeTRI (Bank 6)SoundApply volume and pitch changes to the TRI channel
applyVolumeNOISE (Common)Workspace variable A flag that determines whether to apply the volume envelope to the NOISE channel
applyVolumeSQ1 (Common)Workspace variable A flag that determines whether to apply the volume envelope to the SQ1 channel
applyVolumeSQ2 (Common)Workspace variable A flag that determines whether to apply the volume envelope to the SQ2 channel
ARCTAN (Bank 1)Maths (Geometry)Calculate A = arctan(P / Q)
asciiToPattern (Common)Workspace variable The number to add to an ASCII code to get the pattern number in the PPU of the corresponding character image
ASH (Common)Workspace variable Aft shield status
attrBuffer0 (Common)Workspace variable The buffer for attribute table 0 that gets sent to the PPU during VBlank
attrBuffer1 (Common)Workspace variable The buffer for attribute table 0 that gets sent to the PPU during VBlank
attrSprite0 (Common)Workspace variable Attributes for sprite 0
attrSprite1 (Common)Workspace variable Attributes for sprite 1
attrSprite10 (Common)Workspace variable Attributes for sprite 10
attrSprite11 (Common)Workspace variable Attributes for sprite 11
attrSprite12 (Common)Workspace variable Attributes for sprite 12
attrSprite13 (Common)Workspace variable Attributes for sprite 13
attrSprite14 (Common)Workspace variable Attributes for sprite 14
attrSprite15 (Common)Workspace variable Attributes for sprite 15
attrSprite16 (Common)Workspace variable Attributes for sprite 16
attrSprite17 (Common)Workspace variable Attributes for sprite 17
attrSprite18 (Common)Workspace variable Attributes for sprite 18
attrSprite19 (Common)Workspace variable Attributes for sprite 19
attrSprite2 (Common)Workspace variable Attributes for sprite 2
attrSprite20 (Common)Workspace variable Attributes for sprite 20
attrSprite21 (Common)Workspace variable Attributes for sprite 21
attrSprite22 (Common)Workspace variable Attributes for sprite 22
attrSprite23 (Common)Workspace variable Attributes for sprite 23
attrSprite24 (Common)Workspace variable Attributes for sprite 24
attrSprite25 (Common)Workspace variable Attributes for sprite 25
attrSprite26 (Common)Workspace variable Attributes for sprite 26
attrSprite27 (Common)Workspace variable Attributes for sprite 27
attrSprite28 (Common)Workspace variable Attributes for sprite 28
attrSprite29 (Common)Workspace variable Attributes for sprite 29
attrSprite3 (Common)Workspace variable Attributes for sprite 3
attrSprite30 (Common)Workspace variable Attributes for sprite 30
attrSprite31 (Common)Workspace variable Attributes for sprite 31
attrSprite32 (Common)Workspace variable Attributes for sprite 32
attrSprite33 (Common)Workspace variable Attributes for sprite 33
attrSprite34 (Common)Workspace variable Attributes for sprite 34
attrSprite35 (Common)Workspace variable Attributes for sprite 35
attrSprite36 (Common)Workspace variable Attributes for sprite 36
attrSprite37 (Common)Workspace variable Attributes for sprite 37
attrSprite38 (Common)Workspace variable Attributes for sprite 38
attrSprite39 (Common)Workspace variable Attributes for sprite 39
attrSprite4 (Common)Workspace variable Attributes for sprite 4
attrSprite40 (Common)Workspace variable Attributes for sprite 40
attrSprite41 (Common)Workspace variable Attributes for sprite 41
attrSprite42 (Common)Workspace variable Attributes for sprite 42
attrSprite43 (Common)Workspace variable Attributes for sprite 43
attrSprite44 (Common)Workspace variable Attributes for sprite 44
attrSprite45 (Common)Workspace variable Attributes for sprite 45
attrSprite46 (Common)Workspace variable Attributes for sprite 46
attrSprite47 (Common)Workspace variable Attributes for sprite 47
attrSprite48 (Common)Workspace variable Attributes for sprite 48
attrSprite49 (Common)Workspace variable Attributes for sprite 49
attrSprite5 (Common)Workspace variable Attributes for sprite 5
attrSprite50 (Common)Workspace variable Attributes for sprite 50
attrSprite51 (Common)Workspace variable Attributes for sprite 51
attrSprite52 (Common)Workspace variable Attributes for sprite 52
attrSprite53 (Common)Workspace variable Attributes for sprite 53
attrSprite54 (Common)Workspace variable Attributes for sprite 54
attrSprite55 (Common)Workspace variable Attributes for sprite 55
attrSprite56 (Common)Workspace variable Attributes for sprite 56
attrSprite57 (Common)Workspace variable Attributes for sprite 57
attrSprite58 (Common)Workspace variable Attributes for sprite 58
attrSprite59 (Common)Workspace variable Attributes for sprite 59
attrSprite6 (Common)Workspace variable Attributes for sprite 6
attrSprite60 (Common)Workspace variable Attributes for sprite 60
attrSprite61 (Common)Workspace variable Attributes for sprite 61
attrSprite62 (Common)Workspace variable Attributes for sprite 62
attrSprite63 (Common)Workspace variable Attributes for sprite 63
attrSprite7 (Common)Workspace variable Attributes for sprite 7
attrSprite8 (Common)Workspace variable Attributes for sprite 8
attrSprite9 (Common)Workspace variable Attributes for sprite 9
auto (Common)Workspace variable Docking computer activation status
AutoPlayDemo (Bank 7)Combat demoAutomatically play the demo using the auto-play commands from the autoplayKeys tables
autoPlayDemo (Common)Workspace variable Controls whether to play the demo automatically (which happens after it is left idle for a while)
autoPlayKey (Common)Workspace variable Stores the buttons to be automatically pressed during auto-play
autoPlayKeys (Common)Workspace variable The address of the table containing the key presses to apply when auto-playing the demo
autoPlayKeys1_DE (Bank 7)Combat demoAuto-play commands for the first part of the auto-play combat demo (combat practice) when German is the chosen language
autoPlayKeys1_EN (Bank 7)Combat demoAuto-play commands for the first part of the auto-play combat demo (combat practice) when English is the chosen language
autoPlayKeys1_FR (Bank 7)Combat demoAuto-play commands for the first part of the auto-play combat demo (combat practice) when French is the chosen language
autoPlayKeys1Hi (Bank 5)Combat demoHigh byte of the address of the auto-play key table for each language
autoPlayKeys1Lo (Bank 5)Combat demoLow byte of the address of the auto-play key table for each language
autoPlayKeys2 (Bank 7)Combat demoAuto-play commands for the second part of the auto-play demo (demonstrating the game itself)
autoPlayRepeat (Common)Workspace variable Stores the number of times a step should be repeated during auto-play
AVL (Common)Workspace variable Market availability in the current system
BAD (Bank 0)StatusCalculate how bad we have been
barButtons (Common)Workspace variable The address of the list of button numbers in the iconBarButtons table for the current icon bar
barNames0 (Bank 3)Icon barNametable entries for icon bar 0 (Docked)
barNames1 (Bank 3)Icon barNametable entries for icon bar 1 (Flight)
barNames2 (Bank 3)Icon barNametable entries for icon bar 2 (Charts)
barNames3 (Bank 3)Icon barNametable entries for icon bar 3 (Pause)
barNames4 (Bank 3)Icon barNametable entries for icon bar 4 (Title screen copyright message)
barPatternCounter (Common)Workspace variable The number of icon bar nametable and pattern entries that need to be sent to the PPU in the NMI handler
BAY (Bank 0)StatusGo to the docking bay (i.e. show the Status Mode screen)
BAYSTEP (Bank 0)MissionsGo to the docking bay (i.e. show the Status Mode screen)
BEEP (Bank 7)SoundMake a short, high beep
BEEP_b7 (Bank 7)SoundCall the BEEP routine in ROM bank 7
BEGIN (Bank 7)Start and endRun through the NES initialisation process, reset the variables and start the game
BELL (Bank 2)SoundMake a standard system beep
BET1 (Common)Workspace variable The magnitude of the pitch angle beta, i.e. |beta|, which is a positive value between 0 and 8
BET2 (Common)Workspace variable Bit 7 of BET2 = sign of the pitch angle in BETA
BETA (Common)Workspace variable The current pitch angle beta, which is reduced from JSTY to a sign-magnitude value between -8 and +8
bigLogoImage (Bank 4)Start and endPacked image data for the big Elite logo shown on the Start screen
bigLogoNames (Bank 4)Start and endNametable entries for the big Elite logo on the Start screen
bitplaneFlags (Common)Workspace variable Flags for bitplane 0 that control the sending of data for this bitplane to the PPU during VBlank in the NMI handler:
BlankAllButtons (Bank 3)Icon barBlank all the buttons on the icon bar
BlankButtons6To11 (Bank 3)Icon barBlank from the sixth to the eleventh button on the icon bar
BlankButtons8To11 (Bank 3)Icon barBlank from the eighth to the eleventh button on the icon bar
BLINE (Bank 1)Drawing circlesDraw a circle segment and add it to the ball line heap
BOMB (Common)Workspace variable Energy bomb
BOOP (Bank 7)SoundMake a long, low beep
boxEdge1 (Common)Workspace variable The tile number for drawing the left edge of a box
boxEdge2 (Common)Workspace variable The tile number for drawing the right edge of a box
boxEdgeImages (Bank 3)Drawing the screenImage data for patterns 0 to 4
BPRNT (Bank 0)TextPrint a 32-bit number, left-padded to a specific number of digits, with an optional decimal point
BR1 (Bank 0)Start and endReset a number of variables, ready to start a new game
BRIEF (Bank 0)MissionsStart mission 1 and show the mission briefing
BRIEF2 (Bank 0)MissionsStart mission 2
BRIEF3 (Bank 0)MissionsReceive the briefing and plans for mission 2
BRIS (Bank 2)MissionsClear the screen, display "INCOMING MESSAGE" and wait for 2 seconds
BRIS_b0 (Bank 0)MissionsClear the screen, display "INCOMING MESSAGE" and wait for 2 seconds
BRP (Bank 0)MissionsPrint an extended token and show the Status Mode screen
BRPS (Bank 0)MissionsPrint the extended token in A, show the Status Mode screen and return from the subroutine
BST (Common)Workspace variable Fuel scoops (BST stands for "barrel status")
BUF (Common)Workspace variable The line buffer used by DASC to print justified text
BUMP2 (Bank 7)DashboardBump up the value of the pitch or roll dashboard indicator
burstSpriteIndex (Common)Workspace variable The index into the sprite buffer of the explosion burst sprite that is set up in DrawExplosionBurst
BuyAndSellCargo (Bank 0)MarketProcess the buying and selling of cargo on the Market Price screen
c (Bank 0)EquipmentContains an RTS
CABTMP (Common)Workspace variable Cabin temperature
CalculateGridLines (Bank 6)Combat demoReset the line coordinate tables and populate them with the characters for a specified scroll text
Cartridge WRAM (Common)WorkspacesThe 8K of battery-backed RAM in the Elite cartridge, which is used for the graphics buffers and storing saved commanders
CASH (Common)Workspace variable Our current cash pot
ChangeCmdrName (Bank 6)Save and loadProcess changing the commander name
ChangeCmdrName_b6 (Bank 7)Save and loadCall the ChangeCmdrName routine in ROM bank 6
ChangeLetter (Bank 6)ControllersChoose a letter using the up and down buttons
ChangeToView (Bank 0)Drawing the screenClear the screen and set a new view type
ChangeToView_b0 (Bank 7)Drawing the screenCall the ChangeToView routine in ROM bank 0
channelPriority (Common)Workspace variable The priority of the sound on the current channel (0 to 2)
CHAR (Common)TextMacro definition for characters in the recursive token table
characterEnd (Common)Workspace variable The number of the character beyond the end of the printable character set for the chosen language
characterEndLang (Bank 6)TextThe number of the character beyond the end of the printable character set in each language
chargeDockingFee (Common)Workspace variable Records whether we have been charged a docking fee, so we don't get charged twice:
ChargeShields (Bank 0)FlightCharge the shields and energy banks
chartToShow (Common)Workspace variable Controls which chart is shown when choosing the chart button on the icon bar (as the Long-range and Short-range Charts share the same button)
cheatCmdrName (Bank 6)Save and loadThe commander name that triggers cheat mode in each language
CheckAltitude (Bank 0)FlightPerform an altitude check with the planet, ending the game if we hit the ground
CheckForPause (Bank 0)Icon barPause the game if the pause button (Start) is pressed
CheckForPause-3 (Bank 0)Icon barSet A to the number of the icon bar button in iconBarChoice so we check whether the pause button is being pressed
CheckForPause_b0 (Bank 7)Icon barCall the CheckForPause routine in ROM bank 0
CheckJumpSafety (Bank 0)FlightCheck whether we are far enough away from the planet and sun to be able to do an in-system (fast-forward) jump
CheckJumpSafety+2 (Bank 0)FlightCheck the distances against the value of 0.5 * A
CheckPauseButton (Bank 7)Icon barCheck whether the pause button has been pressed or an icon bar button has been chosen, and process pause/unpause if required
CheckSaveLoadBar (Bank 6)Save and loadCheck the icon bar buttons on the Save and Load icon bar and process any choices
CheckSaveSlots (Bank 6)Save and loadLoad the commanders for all eight save slots, one after the other, to check their integrity and reset any that fail their checksums
CheckSaveSlots_b6 (Bank 7)Save and loadCall the CheckSaveSlots routine in ROM bank 6
CHKON (Bank 1)Drawing circlesCheck whether any part of a circle appears on the extended screen
ChooseLanguage (Bank 6)Start and endDraw the Start screen and process the language choice
ChooseLanguage_b6 (Bank 7)Start and endCall the ChooseLanguage routine in ROM bank 6
ChooseMusic (Bank 6)SoundSet the tune for the background music
ChooseMusic_b6 (Bank 7)SoundCall the ChooseMusic routine in ROM bank 6
ChooseMusicS (Bank 6)SoundA jump table entry at the start of bank 6 for the ChooseMusic routine
CHPR (Part 1 of 6) (Bank 2)TextPrint a character at the text cursor by poking into screen memory
CHPR (Part 2 of 6) (Bank 2)TextJump to the right part of the routine depending on whether the font pattern we need is already loaded
CHPR (Part 3 of 6) (Bank 2)TextDraw a character into the pattern buffers to show the character on-screen
CHPR (Part 4 of 6) (Bank 2)TextProcess the delete character
CHPR (Part 5 of 6) (Bank 2)TextPrint the character using a font that has already been loaded
CHPR (Part 6 of 6) (Bank 2)TextPrint a character in the space view when the relevant font is not loaded, merging the text with whatever is already on-screen
CHPR_b2 (Bank 7)TextCall the CHPR routine in ROM bank 2
CIRCLE (Bank 1)Drawing circlesDraw a circle for the planet
CIRCLE2 (Bank 1)Drawing circlesDraw a circle (for the planet or chart)
CIRCLE2_b1 (Bank 7)Drawing circlesCall the CIRCLE2 routine in ROM bank 1
clearAddress (Common)Workspace variable The address of a block of memory to clear, for example when clearing the buffers
clearBlockSize (Common)Workspace variable The size of the block of memory to clear, for example when clearing the buffers
ClearBuffers (Bank 7)Drawing the screenIf there are enough free cycles, clear down the nametable and pattern buffers for both bitplanes
ClearDashEdge (Bank 6)Drawing the screenClear the right edge of the dashboard
ClearDashEdge_b6 (Bank 7)Drawing the screenCall the ClearDashEdge routine in ROM bank 6
ClearDrawingPlane (Part 1 of 3) (Bank 7)Drawing the screenClear the nametable and pattern buffers for the newly flipped drawing plane
ClearDrawingPlane (Part 2 of 3) (Bank 7)Drawing the screenClear the nametable buffers for the newly flipped drawing plane
ClearDrawingPlane (Part 3 of 3) (Bank 7)Drawing the screenClear the pattern buffers for the newly flipped drawing plane
clearingNameTile (Common)Workspace variable The number of the first tile to clear in nametable buffer 0 when the NMI handler clears tiles, divided by 8
clearingPattern (Common)Workspace variable The number of the first pattern to clear in pattern buffer 0 when the NMI handler clears patterns
ClearMemory (Bank 7)Utility routinesClear a block of memory, split across multiple calls if required
ClearNameInMiddle (Bank 6)Save and loadRemove the commander name from the middle column
ClearPlaneBuffers (Part 1 of 2) (Bank 7)Drawing the screenClear the nametable and pattern buffers of data that has already been sent to the PPU, starting with the nametable buffer
ClearPlaneBuffers (Part 2 of 2) (Bank 7)Drawing the screenClear the pattern buffer of data that has already been sent to the PPU for the current bitplane
ClearScanner (Bank 7)DashboardRemove all ships from the scanner and hide the scanner sprites
ClearScreen (Bank 3)Drawing the screenClear the screen by clearing patterns 66 to 255 in both pattern buffers, and clearing both nametable buffers to the background
ClearScreen_b3 (Bank 7)Drawing the screenCall the ClearScreen routine in ROM bank 3
CLIP (Bank 1)Drawing linesAnother name for LL145 CLIP2 Don't initialise the values in SWAP or A
CLIP2 (Bank 1)Drawing linesDon't initialise the values in SWAP or A
CLIP_b1 (Bank 7)Drawing linesCall the CLIP routine in ROM bank 1, drawing the clipped line if it fits on-screen
cloudSize (Common)Workspace variable Used to store the explosion cloud size in PTCLS
CLYNS (Bank 7)Drawing the screenClear the bottom two text rows of the visible screen
CLYNS+8 (Bank 7)Drawing the screenDon't zero DLY and de
cmn (Bank 0)StatusPrint the commander's name
cmn-1 (Bank 0)StatusContains an RTS
CNT (Common)Workspace variable Temporary storage, typically used for storing the number of iterations required when looping
CNT2 (Common)Workspace variable Temporary storage, used in the planet-drawing routine to store the segment number where the arc of a partial circle should start
cntr (Bank 7)DashboardApply damping to the pitch or roll dashboard indicator
cobraImage (Bank 3)EquipmentPacked image data for the Cobra Mk III shown on the Equip Ship screen
cobraNames (Bank 4)Save and loadNametable entries for the Cobra Mk III shown on the Equip Ship screen
COK (Common)Workspace variable A flag to record whether cheat mode has been applied (by renaming the commander file to CHEATER, BETRUG or TRICHER)
COMPAS (Bank 0)DashboardUpdate the compass
conditionAttrs (Bank 6)DashboardSprite attributes for the status condition indicator on the dashboard
conditionPatts (Bank 6)DashboardPattern numbers for the status condition indicator on the dashboard
ConsiderSendTiles (Bank 7)PPUIf there are enough free cycles, move on to the next stage of sending patterns to the PPU
CONT (Common)TextMacro definition for control codes in the recursive token table
controller1A (Common)Workspace variable A shift register for recording presses of the A button on controller 1
controller1B (Common)Workspace variable A shift register for recording presses of the B button on controller 1
controller1Down (Common)Workspace variable A shift register for recording presses of the down button on controller 1
controller1Left (Common)Workspace variable A shift register for recording presses of the left button on controller 1
controller1Left03 (Common)Workspace variable Bits 0 to 3 of the left button controller variable
controller1Right (Common)Workspace variable A shift register for recording presses of the right button on controller 1
controller1Right03 (Common)Workspace variable Bits 0 to 3 of the right button controller variable
controller1Select (Common)Workspace variable A shift register for recording presses of the Select button on controller 1
controller1Start (Common)Workspace variable A shift register for recording presses of the Start button on controller 1
controller1Up (Common)Workspace variable A shift register for recording presses of the up button on controller 1
controller2A (Common)Workspace variable A shift register for recording presses of the A button on controller 2
controller2B (Common)Workspace variable A shift register for recording presses of the B button on controller 2
controller2Down (Common)Workspace variable A shift register for recording presses of the down button on controller 2
controller2Left (Common)Workspace variable A shift register for recording presses of the left button on controller 2
controller2Right (Common)Workspace variable A shift register for recording presses of the right button on controller 2
controller2Select (Common)Workspace variable A shift register for recording presses of the Select button on controller 2
controller2Start (Common)Workspace variable A shift register for recording presses of the Start button on controller 2
controller2Up (Common)Workspace variable A shift register for recording presses of the up button on controller 2
CopyCommanderToBuf (Bank 6)Save and loadCopy a commander file in the BUF buffer, either from a save slot or from the currently active commander in-game
CopyLargeBlock (Bank 7)Utility routinesAn unused routine that copies a large number of pages in memory
CopyNameBuffer0To1 (Bank 7)Drawing the screenCopy the contents of nametable buffer 0 to nametable buffer 1
Copyright and version message (Bank 3)TextA copyright and version message buried in the code
Copyright message (Bank 5)TextA copyright message buried in the code, complete with typo
CopySmallBlock (Bank 7)Utility routinesAn unused routine that copies a small number of pages in memory
cpl (Bank 0)UniversePrint the selected system name
creditsText1 (Bank 6)Combat demoText for the first part of the credits scroll text
creditsText1Hi (Bank 6)Combat demoLookup table for the high byte of the address of the creditsText1 text for each language
creditsText1Lo (Bank 6)Combat demoLookup table for the low byte of the address of the creditsText1 text for each language
creditsText2 (Bank 6)Combat demoText for the second part of the credits scroll text
creditsText2Hi (Bank 6)Combat demoLookup table for the high byte of the address of the creditsText2 text for each language
creditsText2Lo (Bank 6)Combat demoLookup table for the low byte of the address of the creditsText2 text for each language
creditsText3 (Bank 6)Combat demoText for the third part of the credits scroll text
creditsText3Hi (Bank 6)Combat demoLookup table for the high byte of the address of the creditsText3 text for each language
creditsText3Lo (Bank 6)Combat demoLookup table for the low byte of the address of the creditsText3 text for each language
CRGO (Common)Workspace variable Our ship's cargo capacity
csh (Bank 0)StatusPrint the current amount of cash
currentBank (Common)Workspace variable Contains the number of the ROM bank (0 to 6) that is currently paged into memory at $8000
currentSlot (Common)Workspace variable The save slot for the currently selected commander file
cycleCount (Common)Workspace variable Counts the number of CPU cycles left in the current VBlank in the NMI handler
DAMP (Common)Workspace variable Controller damping configuration setting
DASC (Bank 2)TextDASC does exactly the same as TT26 and prints a character at the text cursor, with support for verified text in extended tokens
DASC_b2 (Bank 7)TextCall the DASC routine in ROM bank 2
dashImage (Bank 3)DashboardPacked image data for the dashboard
dashNames (Bank 3)DashboardNametable entries for the dashboard
dataForPPU (Common)Workspace variable An address pointing to data that we send to the PPU
DCS1 (Bank 0)FlightCalculate the vector from the ideal docking position to the ship
de (Common)Workspace variable Equipment destruction flag
DEATH (Bank 0)Start and endDisplay the death screen
DEATH2 (Bank 0)Start and endReset most of the game and restart from the title screen
DEATH2_b0 (Bank 7)Start and endSwitch to ROM bank 0 and call the DEATH2 routine
DEBRIEF (Bank 0)MissionsFinish mission 1
DEBRIEF2 (Bank 0)MissionsFinish mission 2
decimalPoint (Common)Workspace variable The decimal point character for the chosen language
decimalPointLang (Bank 6)TextThe decimal point character to use for each language
decj2 (Bank 7)ControllersReturn a value of X = 128, for the centre of the indicator
DecreaseJoystick (Bank 7)ControllersDecrease a joystick value by a specific amount, jumping straight to the indicator centre if we decrease from the right-hand side
DELAY (Bank 7)Utility routinesWait until a specified number of NMI interrupts have passed (i.e. a specified number of VBlanks)
DELT4 (Common)Workspace variable Our current speed * 64 as a 16-bit value
DELTA (Common)Workspace variable Our current speed, in the range 1-40
demoInProgress (Common)Workspace variable A flag to determine whether we are playing the demo:
DENGY (Bank 0)FlightDrain some energy from the energy banks
DETOK (Bank 2)TextPrint an extended recursive token from the TKN1 token table
DETOK2 (Bank 2)TextPrint an extended text token (1-255)
DETOK3 (Bank 2)TextPrint an extended recursive token from the RUTOK token table
DETOK_b2 (Bank 7)TextCall the DETOK routine in ROM bank 2
DIALS (Bank 6)DashboardUpdate the dashboard
DIALS_b6 (Bank 7)DashboardCall the DIALS routine in ROM bank 6
DILX (Bank 6)DashboardUpdate a bar-based indicator on the dashboard
DILX+2 (Bank 6)DashboardThe range of the indicator is 0-64 (for the fuel and speed indicators)
DisableJustifyText (Bank 0)TextTurn off justified text and reset the justified text buffer
disableMusic (Common)Workspace variable Music on/off configuration setting
distaway (Common)Workspace variable Used to store the nearest distance of the rotating ship on the title screen
djd1 (Bank 7)DashboardAuto-recentre the value in X, if keyboard auto-recentre is configured
DKCMP (Common)Workspace variable Docking computer
DLY (Common)Workspace variable In-flight message delay
dn (Bank 0)MarketPrint the amount of money we have left in the cash pot
DNOIZ (Common)Workspace variable Sound on/off configuration setting
dock2 (Bank 3)Icon barProcess the second button on the Docked or Flight icon bars
dockEd (Bank 0)FlightPrint a message to say there is no hyperspacing allowed inside the station
DOCKIT (Bank 0)FlightApply docking manoeuvres to the ship in INWK
DOENTRY (Bank 0)FlightDock at the space station, show the ship hangar and work out any mission progression
DOEXP (Bank 1)Drawing shipsDraw an exploding ship
DOKEY (Bank 0)ControllersScan for the seven primary flight controls and apply the docking computer manoeuvring code
DORND (Bank 7)Maths (Arithmetic)Generate random numbers
DORND2 (Bank 7)Maths (Arithmetic)Make sure the C flag doesn't affect the outcome
Draw2OptionTiles (Bank 3)Icon barDraw a top and bottom tile over the top of an icon bar button in the Pause icon bar to change an option icon to a non-default state
Draw4OptionTiles (Bank 3)Icon barDraw four tiles over the top of an icon bar button in the Pause icon bar to change an option icon to a non-default state
Draw6OptionTiles (Bank 3)Icon barDraw six tiles over the top of an icon bar button in the Pause icon bar to change an option icon to a non-default state
DrawBackground (Bank 3)Drawing the screenDraw the background of a system or commander image into the nametable buffer
DrawBackground_b3 (Bank 7)Drawing the screenCall the DrawBackground routine in ROM bank 3
DrawBigLogo (Bank 4)Start and endSet the pattern and nametable buffer entries for the big Elite logo on the Start screen
DrawBigLogo_b4 (Bank 7)Start and endCall the DrawBigLogo routine in ROM bank 4
DrawBitplaneInNMI (Bank 7)Drawing the screenConfigure the NMI to send the drawing bitplane to the PPU after drawing the box edges and setting the next free tile number
DrawBlankButton2x2 (Bank 3)Icon barDraw a blank icon bar button as a 2x2 tile block
DrawBlankButton3x2 (Bank 3)Icon barDraw a blank icon bar button as a 3x2 tile block
DrawBoxEdges (Bank 7)Drawing the screenDraw the left and right edges of the box along the sides of the screen, drawing into the nametable buffer for the drawing bitplane
DrawBoxTop (Bank 7)Drawing the screenDraw the top edge of the box along the top of the screen in nametable buffer 0
DrawChartSystem (Bank 0)ChartsDraw system blobs on short-range chart
DrawCmdrImage (Bank 6)StatusDraw the commander image as a coloured face image in front of a greyscale headshot image, with optional embellishments
DrawCmdrImage_b6 (Bank 7)StatusCall the DrawCmdrImage routine in ROM bank 6
DrawCobraMkIII (Bank 0)EquipmentDraw the Cobra Mk III on the Equip Ship screen
DrawCrosshairs (Bank 0)ChartsDraw a set of moveable crosshairs as a square reticle
DrawDash (Bank 7)Drawing pixelsDraw a 2-pixel dash
DrawDashNames (Bank 3)DashboardDraw the dashboard into both the nametable buffers
DrawDashNames_b3 (Bank 7)DashboardCall the DrawDashNames routine in ROM bank 3
DrawEquipment (Bank 6)EquipmentDraw the currently fitted equipment onto the Cobra Mk III image on the Equip Ship screen
DrawEquipment_b6 (Bank 7)EquipmentCall the DrawEquipment routine in ROM bank 6
DrawExplosionBurst (Bank 1)Drawing shipsDraw an exploding ship along with an explosion burst made up of colourful sprites
DrawGlasses (Bank 6)StatusDraw a pair of dark glasses on the commander image
DrawHangarWallLine (Bank 1)Ship hangarDraw a vertical hangar wall line from top to bottom, stopping when it bumps into existing on-screen content
DrawIconBar (Bank 3)Icon barDraw the icon bar into the nametable buffers for both bitplanes
DrawImageFrame (Bank 3)Drawing the screenDraw a frame around the system image or commander headshot
DrawImageFrame_b3 (Bank 7)Drawing the screenCall the DrawImageFrame routine in ROM bank 3
DrawImageNames (Bank 4)Drawing the screenSet the nametable buffer entries for the specified image
DrawImageNames_b4 (Bank 7)Drawing the screenCall the DrawImageNames routine in ROM bank 4
drawingBitplane (Common)Workspace variable Flipped manually by calling FlipDrawingPlane, controls whether we are showing nametable/palette buffer 0 or 1
drawingPlaneDebug (Common)Workspace variable This variable is set to 0 whenever the drawing bitplane changes, but it is never read, so maybe this is part of some debug code that was left behind?
DrawInventoryIcon (Bank 7)Icon barDraw the inventory icon on top of the second button in the icon bar
DrawLaunchBox (Bank 6)FlightDraw a box as part of the launch tunnel animation
DrawLaunchBox_b6 (Bank 7)FlightCall the DrawLaunchBox routine in ROM bank 6
DrawLeftEarring (Bank 6)StatusDraw an earring in the commander's left ear (i.e. on the right side of the commander image
DrawLightning (Bank 6)FlightDraw a lightning effect for the launch tunnel and E.C.M. that consists of two random lightning bolts, one above the other
DrawLightning_b6 (Bank 7)FlightCall the DrawLightning routine in ROM bank 6
DrawMedallion (Bank 6)StatusDraw a medallion on the commander image
DrawMessageInNMI (Bank 7)Drawing the screenConfigure the NMI to send the portion of the screen that contains the in-flight message to the PPU (i.e. tile rows 22 to 24)
DrawPitchRollBars (Bank 0)DashboardUpdate the pitch and roll bars on the dashboard
DrawRightEarring (Bank 6)StatusDraw an earring in the commander's right ear (i.e. on the left side of the commander image
DrawRowOfTiles (Bank 3)Drawing the screenDraw a row of tiles into the nametable buffer
DrawSaveSlotMark (Bank 6)Save and loadDraw a slot mark (a dash) next to a saved slot
DrawScreenInNMI (Bank 0)Drawing the screenConfigure the NMI handler to draw the screen
DrawScreenInNMI_b0 (Bank 7)Drawing the screenCall the DrawScreenInNMI routine in ROM bank 0
DrawScrollFrame (Bank 6)Combat demoDraw one frame of the scroll text
DrawScrollFrames (Bank 6)Combat demoDraw a scroll text over multiple frames
DrawScrollInNMI (Bank 6)Combat demoConfigure the NMI handler to draw the scroll text screen
DrawScrollText (Bank 6)Combat demoDisplay a Star Wars scroll text
DrawShipInBitplane (Bank 7)Drawing shipsFlip the drawing bitplane and draw the current ship in the newly flipped bitplane
DrawSmallBox (Bank 3)Drawing the screenDraw a small box, typically used for popups or outlines
DrawSmallBox_b3 (Bank 7)Drawing the screenCall the DrawSmallBox routine in ROM bank 3
DrawSmallLogo (Bank 4)Save and loadSet the sprite buffer entries for the small Elite logo on the Save and Load screen
DrawSmallLogo_b4 (Bank 7)Save and loadCall the DrawSmallLogo routine in ROM bank 4
DrawSpaceViewInNMI (Bank 0)Drawing the screenConfigure the NMI handler to draw the space view
DrawSpriteImage (Bank 6)Drawing spritesDraw an image out of sprites using patterns in sequential tiles in the pattern buffer
DrawSpriteImage+2 (Bank 6)Drawing spritesSet the attributes for the sprites in the image to A
DrawSpriteImage_b6 (Bank 7)Drawing spritesCall the DrawSpriteImage routine in ROM bank 6
DrawSunEdge (Bank 1)Drawing sunsDraw a sun line from (X1, Y) to (X2, Y)
DrawSunEdgeLeft (Bank 1)Drawing sunsDraw a sun line in the tile on the left end of a sun row
DrawSunEdgeRight (Bank 1)Drawing sunsDraw a sun line in the tile on the right end of a sun row
DrawSunRowOfBlocks (Bank 7)Drawing sunsDraw a row of character blocks that contain sunlight, silhouetting any existing content against the sun
DrawSystemImage (Bank 3)UniverseDraw the system image as a coloured foreground in front of a greyscale background
DrawSystemImage_b3 (Bank 7)UniverseCall the DrawSystemImage routine in ROM bank 3
DrawTitleScreen (Bank 7)Start and endDraw a sequence of rotating ships on-screen while checking for button presses on the controllers
DrawVerticalLine (Part 1 of 3) (Bank 7)Drawing linesDraw a vertical line from (X1, Y1) to (X1, Y2)
DrawVerticalLine (Part 2 of 3) (Bank 7)Drawing linesDraw the top end or bottom end of the line
DrawVerticalLine (Part 3 of 3) (Bank 7)Drawing linesDraw the middle portion of the line from full-height blocks
DTEN (Bank 2)TextPrint recursive token number X from the token table pointed to by (A V), used to print tokens from the RUTOK table via calls to DETOK3
DTS (Bank 2)TextPrint a single letter in the correct case
DTS_b2 (Bank 7)TextCall the DTS routine in ROM bank 2
DTW1 (Common)Workspace variable A mask for applying the lower case part of Sentence Case to extended text tokens
DTW2 (Common)Workspace variable A flag that indicates whether we are currently printing a word
DTW3 (Common)Workspace variable A flag for switching between standard and extended text tokens
DTW4 (Common)Workspace variable Flags that govern how justified extended text tokens are printed
DTW5 (Common)Workspace variable The size of the justified text buffer at BUF
DTW6 (Common)Workspace variable A flag to denote whether printing in lower case is enabled for extended text tokens
DTW8 (Common)Workspace variable A mask for capitalising the next letter in an extended text token
dutyLoopEnvSQ1 (Common)Workspace variable The high nibble to use for SQ1_VOL, when setting the following for the SQ1 channel:
dutyLoopEnvSQ2 (Common)Workspace variable The high nibble to use for SQ2_VOL, when setting the following for the SQ2 channel:
DV41 (Bank 7)Maths (Arithmetic)Calculate (P R) = 256 * DELTA / A
DV42 (Bank 7)Maths (Arithmetic)Calculate (P R) = 256 * DELTA / z_hi
DVID3B2 (Bank 7)Maths (Arithmetic)Calculate K(3 2 1 0) = (A P+1 P) / (z_sign z_hi z_lo)
DVID4 (Bank 7)Maths (Arithmetic)Calculate (P R) = 256 * A / Q
DVIDT (Bank 1)Maths (Arithmetic)Calculate (P+1 A) = (A P) / Q
E% (Bank 1)Drawing shipsShip blueprints default NEWB flags
ECBLB2 (Bank 7)DashboardStart up the E.C.M. (start the countdown and make the E.C.M. sound)
ECHR (Common)TextMacro definition for characters in the extended token table
ECM (Common)Workspace variable E.C.M. system
ECMA (Common)Workspace variable The E.C.M. countdown timer, which determines whether an E.C.M. system is currently operating:
ECMOF (Bank 0)SoundSwitch off the E.C.M.
ECMP (Common)Workspace variable Our E.C.M. status
EDGE (Common)Drawing shipsMacro definition for adding edges to ship blueprints
EDGES (Bank 1)Drawing linesDraw a horizontal line given a centre and a half-width
EDGES-2 (Bank 1)Drawing linesReturn the C flag set if argument A is 0
EE51 (Bank 1)Drawing shipsRemove the current ship from the screen, called from SHPPT before drawing the ship as a point
effectOnNOISE (Common)Workspace variable Records whether a sound effect is being made on the NOISE channel
effectOnSQ1 (Common)Workspace variable Records whether a sound effect is being made on the SQ1 channel
effectOnSQ2 (Common)Workspace variable Records whether a sound effect is being made on the SQ2 channel
EJMP (Common)TextMacro definition for jump tokens in the extended token table
enableBitplanes (Common)Workspace variable A flag to control whether two different bitplanes are implemented when drawing the screen, so smooth vector graphics can be shown
EnableSound (Bank 6)SoundEnable sounds (music and sound effects)
enableSound (Common)Workspace variable Controls sound effects and music in David Whittaker's sound module
EnableSoundS (Bank 6)SoundA jump table entry at the start of bank 6 for the EnableSound routine
ENERGY (Common)Workspace variable Energy bank status
ENGY (Common)Workspace variable Energy unit
eq (Bank 0)EquipmentSubtract the price of equipment from the cash pot
EQSHP (Bank 0)EquipmentShow the Equip Ship screen
equi1 (Bank 0)EquipmentA re-entry point into the key-pressing loop, used when processing key presses in subroutines
equipSprites (Bank 6)EquipmentSprite configuration data for the sprites that show the equipment fitted to our Cobra Mk III on the Equip Ship screen
ERND (Common)TextMacro definition for random tokens in the extended token table
ESCAPE (Bank 0)FlightLaunch our escape pod
ESCP (Common)Workspace variable Escape pod
ETOK (Common)TextMacro definition for recursive tokens in the extended token table
ETWO (Common)TextMacro definition for two-letter tokens in the extended token table
EV (Common)Workspace variable The "extra vessels" spawning counter
ex (Bank 2)TextPrint a recursive token
ex_b2 (Bank 7)TextCall the ex routine in ROM bank 2
EXNO (Bank 0)SoundMake the sound of a laser strike or ship explosion
EXNO2 (Bank 0)StatusProcess us making a kill
EXNO3 (Bank 7)SoundMake an explosion sound
explosionSounds (Bank 0)SoundSound numbers for explosions at different distances from our ship
EXS1 (Bank 1)Drawing shipsSet (A X) = (A R) +/- random * cloud size
extendedTokensHi (Bank 6)TextHigh byte of the extended text token table for each language
extendedTokensLo (Bank 6)TextLow byte of the extended text token table for each language
FACE (Common)Drawing shipsMacro definition for adding faces to ship blueprints
faceCount (Bank 4)StatusThe number of commander face images in the faceOffset table
faceImage0 (Bank 4)StatusPacked image data for commander face image 0
faceImage1 (Bank 4)StatusPacked image data for commander face image 1
faceImage10 (Bank 4)StatusPacked image data for commander face image 10
faceImage11 (Bank 4)StatusPacked image data for commander face image 11
faceImage12 (Bank 4)StatusPacked image data for commander face image 12
faceImage13 (Bank 4)StatusPacked image data for commander face image 13
faceImage2 (Bank 4)StatusPacked image data for commander face image 2
faceImage3 (Bank 4)StatusPacked image data for commander face image 3
faceImage4 (Bank 4)StatusPacked image data for commander face image 4
faceImage5 (Bank 4)StatusPacked image data for commander face image 5
faceImage6 (Bank 4)StatusPacked image data for commander face image 6
faceImage7 (Bank 4)StatusPacked image data for commander face image 7
faceImage8 (Bank 4)StatusPacked image data for commander face image 8
faceImage9 (Bank 4)StatusPacked image data for commander face image 9
faceOffset (Bank 4)StatusOffset to the data for each of the 14 commander face images
FadeAndHideSprites (Bank 7)Drawing spritesFade the screen to black and hide all sprites
FadeColours (Bank 3)Drawing the screenFade the screen colours towards black
fadeColours (Bank 3)Drawing the screenLookup table that converts a NES colour to the same colour but with a smaller brightness value
FadeColoursTwice (Bank 3)Drawing the screenFade the screen colours towards black twice
FadeToBlack (Bank 3)Drawing the screenFade the screen to black over the next four VBlanks
FadeToBlack_b3 (Bank 7)Drawing the screenCall the FadeToBlack routine in ROM bank 3
FadeToColour (Bank 3)Drawing the screenReverse-fade the screen from black to full colour over the next four VBlanks
FadeToColour_b3 (Bank 7)Drawing the screenCall the FadeToColour routine in ROM bank 3
FAROF (Bank 0)Maths (Geometry)Compare x_hi, y_hi and z_hi with 224
FAROF2 (Bank 7)Maths (Geometry)Compare x_hi, y_hi and z_hi with A
FastForwardJump (Bank 0)FlightPerform an in-system jump
fbar11 (Bank 3)Icon barProcess the fast-forward and Market Price buttons
fbar8 (Bank 3)Icon barProcess the escape pod, fast-forward and Market Price buttons
FILEPR (Bank 2)Save and loadDisplay the currently selected media (disc or tape)
FILL_MEMORY (Common)Drawing the screenFill memory with the specified number of bytes
FillMemory (Bank 7)Utility routinesFill a block of memory with a specified value
FillMemory32Bytes (Bank 7)Utility routinesFill a 32-byte block of memory with a specified value
firstBox (Common)Workspace variable Used to detect the first iteration of the box-drawing loop when drawing the launch tunnel
firstFreePattern (Common)Workspace variable Contains the number of the first free pattern in the pattern buffer that we can draw into next (or 0 if there are no free patterns)
firstNameTile (Common)Workspace variable The number of the first tile for which we send nametable data to the PPU in the NMI handler (potentially for both bitplanes, if both are configured to be sent)
firstPattern (Common)Workspace variable The number of the first pattern for which we send data to the PPU in the NMI handler (potentially for both bitplanes, if both are configured to be sent)
FIST (Common)Workspace variable Our legal status (FIST stands for "fugitive/innocent status"):
FixRandomNumbers (Bank 7)Combat demoFix the random number seeds to a known value so the random numbers generated are always the same when we run the demo
FLAG (Common)Workspace variable A flag that's used to define whether this is the first call to the ball line routine in BLINE, so it knows whether to wait for the second call before storing segment data in the ball line heap
flagsForClearing (Bank 7)Drawing the screenA bitplane mask to control how bitplane buffer clearing works in the ClearPlaneBuffers routine
FlightLoop4To16 (Bank 0)Main loopDisplay in-flight messages, call parts 4 to 12 of the main flight loop for each slot, and fall through into parts 13 to 16
FLIP (Bank 0)StardustReflect the stardust particles in the screen diagonal
FlipDrawingPlane (Bank 7)Drawing the screenFlip the drawing bitplane
FlushSoundChannel (Bank 7)SoundFlush a specific sound channel
FlushSoundChannels (Bank 7)SoundFlush the SQ1, SQ2 and NOISE sound channels
FlushSpecificSound (Bank 7)SoundFlush the channels used by a specific sound
FlushSQ2AndNOISE (Bank 7)SoundFlush the SQ2 and NOISE sound channels
FMLTU (Bank 7)Maths (Arithmetic)Calculate A = A * Q / 256
FMLTU2 (Bank 7)Maths (Arithmetic)Calculate A = K * sin(A)
fontImage (Bank 7)TextImage data for the text font
fontStyle (Common)Workspace variable The font style to use when printing text:
fq1 (Bank 0)TacticsUsed to add a cargo canister to the universe
FR1 (Bank 0)TacticsDisplay the "missile jammed" message
FR1-2 (Bank 0)TacticsClear the C flag and return from the subroutine
FRCE (Bank 0)Main loopThe entry point for the main game loop if we want to jump straight to a specific screen, by pretending to "press" a key, in which case A contains the internal key number of the key we want to "press"
FRIN (Common)Workspace variable Slots for the ships in the local bubble of universe
FRMIS (Bank 0)TacticsFire a missile from our ship
FRS1 (Bank 0)TacticsLaunch a ship straight ahead of us, below the laser sights
FSH (Common)Workspace variable Forward shield status
fwl (Bank 0)StatusPrint fuel and cash levels
fwls (Bank 0)TextPrint fuel and cash levels
GalacticHyperdrive (Bank 0)FlightIf we are in space and the countdown has ended, activate the galactic hyperdrive
galaxySeeds (Bank 6)Save and loadThe galaxy seeds to add to a commander save file
GC2 (Bank 0)Maths (Arithmetic)Calculate (Y X) = (A P) * 4
GCNT (Common)Workspace variable The number of the current galaxy (0-7)
GetCmdrImage (Bank 4)StatusFetch the headshot image for the commander and store it in the pattern buffers, and send the face and glasses images to the PPU
GetCmdrImage_b4 (Bank 7)StatusCall the GetCmdrImage routine in ROM bank 4
GetDefaultNEWB (Bank 7)Drawing shipsFetch the default NEWB flags for a specified ship type
GetHeadshot (Bank 4)StatusFetch the headshot image for the commander and store it in the pattern buffers, starting at pattern number picturePattern
GetHeadshot_b4 (Bank 7)StatusCall the GetHeadshot routine in ROM bank 4
GetHeadshotType (Bank 4)StatusGet the correct headshot number for the current combat rank and status condition
GetHeadshotType_b4 (Bank 7)StatusCall the GetHeadshotType routine in ROM bank 4
GetLaserPattern (Bank 6)EquipmentGet the pattern number for a specific laser's equipment sprite
GetNameAddress (Bank 3)Drawing the screenGet the addresses in the nametable buffers for a given tile
GetRowNameAddress (Bank 7)Drawing the screenGet the addresses in the nametable buffers for the start of a given character row
GetSaveAddresses (Bank 6)Save and loadFetch the addresses of the three saved parts for a specific save slot
GetScrollDivisions (Bank 6)Combat demoSet up the division calculations for the scroll text
GetShipBlueprint (Bank 7)Drawing shipsFetch a specified byte from the current ship blueprint
GetStatusCondition (Bank 7)StatusCalculate our ship's status condition
GetSystemBack (Bank 5)UniverseFetch the background image for the current system and store it in the pattern buffers
GetSystemBack_b5 (Bank 7)UniverseCall the GetSystemBack routine in ROM bank 5
GetSystemImage (Bank 5)UniverseFetch the background image and foreground sprite for the current system image and send them to the pattern buffers and PPU
GetSystemImage_b5 (Bank 7)UniverseCall the GetSystemImage routine in ROM bank 5
GetViewPalettes (Bank 3)Drawing the screenGet the palette for the view type in QQ11a and store it in a table at XX3
Ghy (Bank 0)FlightPerform a galactic hyperspace jump
GHYP (Common)Workspace variable Galactic hyperdrive
GINF (Bank 7)UniverseFetch the address of a ship's data block into INF
glassesImage (Bank 4)StatusPacked image data for the glasses, earrings and medallion that the commander can wear
GNTMP (Common)Workspace variable Laser temperature (or "gun temperature")
GOIN (Bank 0)Main loopWe jump here from part 3 of the main flight loop if the docking computer is activated by pressing "C"
GOPL (Bank 0)TacticsMake the ship head towards the planet
gov (Common)Workspace variable The current system's government type (0-7)
GRIDSET (Bank 6)Combat demoPopulate the line coordinate tables with the pixel lines for one 21-character line of scroll text
GRIDSET+5 (Bank 6)Combat demoUse the y-coordinate in YP so the scroll text starts at (0, YP) rather than (0, 6)
GRS1 (Bank 6)Combat demoPopulate the line coordinate tables with the lines for a single scroll text character
GTHG (Bank 0)UniverseSpawn a Thargoid ship and a Thargon companion
GTHG+15 (Bank 0)UniverseSpawn a lone Thargoid, without a Thargon companion and with slightly less aggression than normal
GVL (Bank 0)UniverseCalculate the availability of market items
HAL3 (Bank 1)Ship hangarDraw a hangar background line from left to right, stopping when it bumps into existing on-screen content
halfScreenHeight (Common)Workspace variable Half the height of the drawable part of the screen in pixels (can be 72, 77 or 104 pixels)
HALL (Bank 1)Ship hangarDraw the ships in the ship hangar, then draw the hangar
HALL_b1 (Bank 7)Ship hangarCall the HALL routine in ROM bank 1
HANGER (Bank 1)Ship hangarDisplay the ship hangar
HANGFLAG (Common)Workspace variable The number of ships being displayed in the ship hangar
HAS1 (Bank 1)Ship hangarDraw a ship in the ship hangar
HAS3 (Bank 1)Ship hangarDraw a hangar background line from right to left
HATB (Bank 1)Ship hangarShip hangar group table
headCount (Bank 4)StatusThe number of commander headshot images in the headOffset table
headImage0 (Bank 4)StatusPacked image data for commander headshot image 0
headImage1 (Bank 4)StatusPacked image data for commander headshot image 1
headImage10 (Bank 4)StatusPacked image data for commander headshot image 10
headImage11 (Bank 4)StatusPacked image data for commander headshot image 11
headImage12 (Bank 4)StatusPacked image data for commander headshot image 12
headImage13 (Bank 4)StatusPacked image data for commander headshot image 13
headImage2 (Bank 4)StatusPacked image data for commander headshot image 2
headImage3 (Bank 4)StatusPacked image data for commander headshot image 3
headImage4 (Bank 4)StatusPacked image data for commander headshot image 4
headImage5 (Bank 4)StatusPacked image data for commander headshot image 5
headImage6 (Bank 4)StatusPacked image data for commander headshot image 6
headImage7 (Bank 4)StatusPacked image data for commander headshot image 7
headImage8 (Bank 4)StatusPacked image data for commander headshot image 8
headImage9 (Bank 4)StatusPacked image data for commander headshot image 9
headOffset (Bank 4)StatusOffset to the data for each of the 14 commander headshot images
headShotsByRank (Bank 4)StatusLookup table for headshots by rank and status condition
HFX (Common)Workspace variable This flag is unused in this version of Elite. In the other versions, setting HFX to a non-zero value makes the hyperspace rings multi-coloured, but the NES has a different hyperspace effect, so this variable is not used
HI1 (Bank 0)TacticsContains an RTS
hiddenBitplane (Common)Workspace variable The bitplane that is currently hidden from view in the space view
hiddenColour (Common)Workspace variable Contains the colour to use for pixels that are hidden in palette 0, e.g. $0F for black
HideCrosshairs (Bank 0)ChartsHide the moveable crosshairs (i.e. the square reticle)
HideExplosionBurst (Bank 7)Drawing shipsHide the four sprites that make up the explosion burst that flashes up when a ship explodes
HideFromScanner (Bank 1)DashboardHide the current ship from the scanner
HideFromScanner_b1 (Bank 7)DashboardCall the HideFromScanner routine in ROM bank 1
HideHiddenColour (Bank 0)Drawing the screenSet the hidden colour to black, so that pixels in this colour in palette 0 are invisible
HideIconBar (Bank 3)Icon barRemove the icon bar from the screen by replacing it with background tiles
HideIconBarPointer (Bank 7)Icon barClear the icon bar choice and hide the icon bar pointer
HideMoreSprites (Bank 7)Drawing spritesHide X + 1 sprites from sprite Y / 4 onwards
HideMostSprites (Bank 7)Drawing spritesHide all sprites except for sprite 0 and the icon bar pointer
HideShip (Bank 1)DashboardUpdate the current ship so it is no longer shown on the scanner
HideShip_b1 (Bank 7)DashboardUpdate the current ship so it is no longer shown on the scanner
HideSightSprites (Bank 3)FlightHide the sprites for the laser sights in the space view
HideSprites (Bank 7)Drawing spritesHide X sprites from sprite Y / 4 onwards
HideStardust (Bank 7)StardustHide the stardust sprites
HighlightEquipment (Bank 0)EquipmentHighlight an item of equipment on the Equip Ship screen
HighlightLaserView (Bank 0)EquipmentHighlight the laser view name in the popup menu
HighlightSaleItem (Bank 0)MarketHighlight the name, price and availability of a market item on the correct row for the chosen language
HighlightSaveName (Bank 6)Save and loadHighlight the name of a specific save slot
hipo2 (Bank 7)Icon barClear the icon button choice and hide the icon bar pointer
HITCH (Bank 0)TacticsWork out if the ship in INWK is in our crosshairs
HLOIN (Part 1 of 5) (Bank 7)Drawing linesDraw a horizontal line from (X1, Y) to (X2, Y) using EOR logic
HLOIN (Part 2 of 5) (Bank 7)Drawing linesDraw the left end of the line
HLOIN (Part 3 of 5) (Bank 7)Drawing linesDraw the middle part of the line
HLOIN (Part 4 of 5) (Bank 7)Drawing linesDraw the right end of the line
HLOIN (Part 5 of 5) (Bank 7)Drawing linesDraw the line when it's all within one character block
HME2 (Bank 0)ChartsSearch the galaxy for a system
hy5 (Bank 0)UniverseContains an RTS
hyp (Bank 0)FlightStart the hyperspace process
hyp1 (Bank 0)UniverseProcess a jump to the system closest to (QQ9, QQ10)
hyp1+3 (Bank 0)UniverseJump straight to the system at (QQ9, QQ10) without first calculating which system is closest. We do this if we already know that (QQ9, QQ10) points to a system
hyperspaceColour (Bank 6)FlightThe different colours that can be used for the hyperspace effect
hyR (Bank 0)UniverseContains an RTS
iconBarButtons (Bank 7)Icon barA list of button numbers for each icon bar type
iconBarChoice (Common)Workspace variable The number of the icon bar button that's just been selected
iconBarImage0 (Bank 3)Icon barImage data for icon bar 0 (Docked)
iconBarImage1 (Bank 3)Icon barImage data for icon bar 1 (Flight)
iconBarImage2 (Bank 3)Icon barImage data for icon bar 2 (Charts)
iconBarImage3 (Bank 3)Icon barImage data for icon bar 3 (Pause)
iconBarImage4 (Bank 3)Icon barImage data for icon bar 4 (Title screen copyright message)
iconBarImageHi (Common)Workspace variable Contains the high byte of the address of the image data for the current icon bar, i.e. HI(iconBarImage0) through to HI(iconBarImage4)
iconBarKeyPress (Common)Workspace variable The button number of an icon bar button if an icon bar button has been chosen
iconBarRow (Common)Workspace variable The row on which the icon bar appears
iconBarType (Common)Workspace variable The type of the current icon bar:
imageSentToPPU (Common)Workspace variable Records when images have been sent to the PPU or unpacked into the buffers, so we don't repeat the process unnecessarily
IncreaseJoystick (Bank 7)ControllersIncrease a joystick value by a specific amount, jumping straight to the indicator centre if we increase from the left-hand side
IncreaseTally (Bank 7)StatusAdd the kill count to the fractional and low bytes of our combat rank tally following a kill
iNES header (iNES header)Start and endThe iNES header for running in an emulator
INF (Common)Workspace variable Temporary storage, typically used for storing the address of a ship's data block, so it can be copied to and from the internal workspace at INWK
InputName (Bank 6)ControllersGet a name from the controller for searching the galaxy or changing commander name
InputName_b6 (Bank 7)ControllersCall the InputName routine in ROM bank 6
inputNameSize (Common)Workspace variable The maximum size of the name to be fetched by the InputName routine
InSystemJump (Bank 0)FlightPerform an in-system (fast-forward) jump
Interrupts (Bank 0)Start and endThe IRQ and NMI handler while the MMC1 mapper reset routine is still running
Interrupts (Bank 1)Start and endThe IRQ and NMI handler while the MMC1 mapper reset routine is still running
Interrupts (Bank 2)Start and endThe IRQ and NMI handler while the MMC1 mapper reset routine is still running
Interrupts (Bank 3)Start and endThe IRQ and NMI handler while the MMC1 mapper reset routine is still running
Interrupts (Bank 4)Start and endThe IRQ and NMI handler while the MMC1 mapper reset routine is still running
Interrupts (Bank 5)Start and endThe IRQ and NMI handler while the MMC1 mapper reset routine is still running
Interrupts (Bank 6)Start and endThe IRQ and NMI handler while the MMC1 mapper reset routine is still running
inventoryIcon (Bank 3)EquipmentImage data for the inventory icon shown on the icon bar in the Market Price screen
INWK (Common)Workspace variable The zero-page internal workspace for the current ship data block
IRQ (Bank 7)Utility routinesHandle IRQ interrupts by doing nothing
ITEM (Common)MarketMacro definition for the market prices table
JAMESON (Bank 6)Save and loadCopy the default "JAMESON" commander to the buffer at currentSlot
JAMESON_b6 (Bank 7)Save and loadCall the JAMESON routine in ROM bank 6
jmp (Bank 0)UniverseSet the current system to the selected system
JMTB (Bank 2)TextThe extended token table for jump tokens 1-32 (DETOK)
joystickDelta (Common)Workspace variable Used to store the amount to change the pitch and roll rates when converting controller button presses into joystick values
JSTGY (Common)Workspace variable Reverse controller y-axis configuration setting
JSTX (Common)Workspace variable Our current roll rate
JSTY (Common)Workspace variable Our current pitch rate
JUNK (Common)Workspace variable The amount of junk in the local bubble
K (Common)Workspace variable Temporary storage, used in a number of places
K% (Common)WorkspacesShip data blocks
K2 (Common)Workspace variable Temporary storage, used in a number of places
K3 (Common)Workspace variable Temporary storage, used in a number of places
K4 (Common)Workspace variable Temporary storage, used in a number of places
K5 (Common)Workspace variable Temporary storage used to store segment coordinates across successive calls to BLINE, the ball line routine
K6 (Common)Workspace variable Temporary storage, typically used for storing coordinates during vector calculations
KILLSHP (Bank 0)UniverseRemove a ship from our local bubble of universe
KL (Common)Workspace variable The following bytes implement a key logger that gets updated according to the controller button presses
KS1 (Bank 0)UniverseRemove the current ship from our local bubble of universe
KS2 (Bank 0)UniverseCheck the local bubble for missiles with target lock
KS3 (Bank 0)UniverseContains an RTS
KS4 (Bank 0)UniverseRemove the space station and replace it with the sun
KWH% (Bank 1)StatusInteger number of kills awarded for destroying each type of ship
KWL% (Bank 1)StatusFractional number of kills awarded for destroying each type of ship
KY1 (Common)Workspace variable One pilot is configured and the down and B buttons are both being pressed on controller 1
KY2 (Common)Workspace variable One pilot is configured and the up and B buttons are both being pressed on controller 1
KY3 (Common)Workspace variable One pilot is configured and the left button is being pressed on controller 1 (and the B button is not being pressed)
KY4 (Common)Workspace variable One pilot is configured and the right button is being pressed on controller 1 (and the B button is not being pressed)
KY5 (Common)Workspace variable One pilot is configured and the down button is being pressed on controller 1 (and the B button is not being pressed)
KY6 (Common)Workspace variable One pilot is configured and the up button is being pressed on controller 1 (and the B button is not being pressed)
KY7 (Common)Workspace variable The A button is being pressed on controller 1
languageIndex (Common)Workspace variable The language that was chosen on the Start screen as an index into the various lookup tables:
languageIndexes (Bank 6)TextThe index of the chosen language for looking up values from language-indexed tables
languageLength (Bank 6)TextThe length of each language name
languageNumber (Common)Workspace variable The language that was chosen on the Start screen as a number:
languageNumbers (Bank 6)TextThe language number for each language, as a set bit within a flag byte
LAS (Common)Workspace variable Contains the laser power of the laser fitted to the current space view (or 0 if there is no laser fitted to the current view)
LAS2 (Common)Workspace variable Laser power for the current laser
LASCT (Common)Workspace variable The laser pulse count for the current laser
LASER (Common)Workspace variable The specifications of the lasers fitted to each of the four space views:
LASLI (Bank 0)Drawing linesDraw the laser lines for when we fire our lasers
LASLI-1 (Bank 0)Drawing linesContains an RTS
lastNameTile (Common)Workspace variable The number of the last nametable buffer entry to send to the PPU nametable table in the NMI handler for bitplane 0, divided by 8
lastPattern (Common)Workspace variable The number of the last pattern entry to send from pattern buffer 0 to bitplane 0 of the PPU pattern table in the NMI handler
lastToSend (Common)Workspace variable The last tile or pattern number to send to the PPU, potentially potentially overwritten by the flags
LASX (Common)Workspace variable The x-coordinate of the tip of the laser line
LASY (Common)Workspace variable The y-coordinate of the tip of the laser line
LAUN (Bank 0)FlightMake the launch sound and draw the launch tunnel
LCASH (Bank 0)Maths (Arithmetic)Subtract an amount of cash from the cash pot
lineImage (Bank 7)Drawing linesImage data for the horizontal line, vertical line and block images
LL10-1 (Bank 1)Drawing shipsContains an RTS
LL118 (Bank 1)Drawing linesMove a point along a line until it is on-screen
LL118-1 (Bank 1)Drawing linesContains an RTS
LL120 (Bank 1)Maths (Arithmetic)Calculate (Y X) = (S x1_lo) * XX12+2 or (S x1_lo) / XX12+2
LL121 (Bank 1)Maths (Arithmetic)Calculate (Y X) = (S R) / Q and set the sign to the opposite of the top byte on the stack
LL122 (Bank 1)Maths (Arithmetic)Calculate (Y X) = (S R) * Q and set the sign to the opposite of the top byte on the stack
LL123 (Bank 1)Maths (Arithmetic)Calculate (Y X) = (S R) / XX12+2 or (S R) * XX12+2
LL128 (Bank 1)Maths (Arithmetic)Contains an RTS
LL129 (Bank 1)Maths (Arithmetic)Calculate Q = XX12+2, A = S EOR XX12+3 and (S R) = |S R|
LL133 (Bank 1)Maths (Arithmetic)Negate (Y X) and return from the subroutine LL128 Contains an RTS
LL145 (Part 1 of 4) (Bank 1)Drawing linesClip line: Work out which end-points are on-screen, if any
LL145 (Part 2 of 4) (Bank 1)Drawing linesClip line: Work out if any part of the line is on-screen
LL145 (Part 3 of 4) (Bank 1)Drawing linesClip line: Calculate the line's gradient
LL145 (Part 4 of 4) (Bank 1)Drawing linesClip line: Call the routine in LL188 to do the actual clipping
LL164 (Bank 6)FlightMake the hyperspace sound and draw the hyperspace tunnel
LL164_b6 (Bank 7)FlightCall the LL164 routine in ROM bank 6
LL28 (Bank 7)Maths (Arithmetic)Calculate R = 256 * A / Q
LL28+4 (Bank 7)Maths (Arithmetic)Skips the A >= Q check and always returns with C flag cleared, so this can be called if we know the division will work
LL38 (Bank 1)Maths (Arithmetic)Calculate (S A) = (S R) + (A Q)
LL5 (Bank 7)Maths (Arithmetic)Calculate Q = SQRT(R Q)
LL51 (Bank 1)Maths (Geometry)Calculate the dot product of XX15 and XX16
LL61 (Bank 1)Maths (Arithmetic)Calculate (U R) = 256 * A / Q
LL62 (Bank 1)Maths (Arithmetic)Calculate 128 - (U R)
LL66 (Bank 1)Drawing shipsA re-entry point into the ship-drawing routine, used by the LL62 routine to store 128 - (U R) on the XX3 heap
LL70+1 (Bank 1)Drawing shipsContains an RTS (as the first byte of an LDA instruction)
LL9 (Part 1 of 12) (Bank 1)Drawing shipsDraw ship: Check if ship is exploding, check if ship is in front
LL9 (Part 2 of 12) (Bank 1)Drawing shipsDraw ship: Check if ship is in field of view, close enough to draw
LL9 (Part 3 of 12) (Bank 1)Drawing shipsDraw ship: Set up orientation vector, ship coordinate variables
LL9 (Part 4 of 12) (Bank 1)Drawing shipsDraw ship: Set visibility for exploding ship (all faces visible)
LL9 (Part 5 of 12) (Bank 1)Drawing shipsDraw ship: Calculate the visibility of each of the ship's faces
LL9 (Part 6 of 12) (Bank 1)Drawing shipsDraw ship: Calculate the visibility of each of the ship's vertices
LL9 (Part 7 of 12) (Bank 1)Drawing shipsDraw ship: Calculate the visibility of each of the ship's vertices
LL9 (Part 8 of 12) (Bank 1)Drawing shipsDraw ship: Calculate the screen coordinates of visible vertices
LL9 (Part 9 of 12) (Bank 1)Drawing shipsDraw ship: Draw laser beams if the ship is firing its laser at us
LL9 (Part 10 of 12) (Bank 1)Drawing shipsDraw ship: Calculate the visibility of each of the ship's edges
LL9 (Part 11 of 12) (Bank 1)Drawing shipsDraw ship: Loop back for the next edge
LL9 (Part 12 of 12) (Bank 1)Drawing shipsDoes nothing in the NES version
LL9_b1 (Bank 7)Drawing shipsCall the LL9 routine in ROM bank 1
LO2 (Bank 0)FlightContains an RTS
LoadHighFont (Bank 3)TextLoad the highlight font into the pattern buffer from pattern 161 to 255
LoadHighFont_b3 (Bank 7)TextCall the LoadHighFont routine in ROM bank 3
LoadNormalFont (Bank 3)TextLoad the normal font into the pattern buffer from pattern 66 to 160
LoadNormalFont_b3 (Bank 7)TextCall the LoadNormalFont routine in ROM bank 3
log (Bank 7)Maths (Arithmetic)Binary logarithm table (high byte)
logL (Bank 7)Maths (Arithmetic)Binary logarithm table (low byte)
logoBallImage (Bank 3)Start and endPacked image data for the ball at the bottom of the big Elite logo shown on the Start screen
LOIN (Part 1 of 7) (Bank 7)Drawing linesDraw a line: Calculate the line gradient in the form of deltas
LOIN (Part 2 of 7) (Bank 7)Drawing linesDraw a line: Line has a shallow gradient, step right along x-axis
LOIN (Part 3 of 7) (Bank 7)Drawing linesDraw a shallow line going right and up or left and down
LOIN (Part 4 of 7) (Bank 7)Drawing linesDraw a shallow line going right and down or left and up
LOIN (Part 5 of 7) (Bank 7)Drawing linesDraw a line: Line has a steep gradient, step up along y-axis
LOIN (Part 6 of 7) (Bank 7)Drawing linesDraw a steep line going up and left or down and right
LOIN (Part 7 of 7) (Bank 7)Drawing linesDraw a steep line going up and right or down and left
LOOK1 (Bank 0)FlightInitialise the space view
lowerCase (Bank 2)TextLookup table for converting ASCII characters to lower case characters in the game's text font
LTDEF (Bank 6)Combat demoLine definitions for characters in the Star Wars scroll text
m (Bank 0)Maths (Geometry)Do not include A in the calculation
M% (Bank 0)Main loopThe entry point for the main flight loop
MA18 (Bank 0)Main loopEntry point for part 13 of the main flight loop
MA232 (Bank 0)FlightContains an RTS
MA9 (Bank 0)Maths (Geometry)Contains an RTS
MAD (Bank 7)Maths (Arithmetic)Calculate (A X) = Q * A + (S R)
Main flight loop (Part 1 of 16) (Bank 0)Main loopSeed the random number generator
Main flight loop (Part 2 of 16) (Bank 0)Main loopCalculate the alpha and beta angles from the current pitch and roll of our ship
Main flight loop (Part 3 of 16) (Bank 0)Main loopScan for flight keys and process the results
Main flight loop (Part 4 of 16) (Bank 0)Main loopFor each nearby ship: Copy the ship's data block from K% to the zero-page workspace at INWK
Main flight loop (Part 5 of 16) (Bank 0)Main loopFor each nearby ship: If an energy bomb has been set off, potentially kill this ship
Main flight loop (Part 6 of 16) (Bank 0)Main loopFor each nearby ship: Move the ship in space and copy the updated INWK data block back to K%
Main flight loop (Part 7 of 16) (Bank 0)Main loopFor each nearby ship: Check whether we are docking, scooping or colliding with it
Main flight loop (Part 8 of 16) (Bank 0)Main loopFor each nearby ship: Process us potentially scooping this item
Main flight loop (Part 9 of 16) (Bank 0)Main loopFor each nearby ship: If it is a space station, check whether we are successfully docking with it
Main flight loop (Part 10 of 16) (Bank 0)Main loopFor each nearby ship: Remove if scooped, or process collisions
Main flight loop (Part 11 of 16) (Bank 0)Main loopFor each nearby ship: Process missile lock and firing our laser
Main flight loop (Part 12 of 16) (Bank 0)Main loopFor each nearby ship: Draw the ship, remove if killed, loop back
Main flight loop (Part 13 of 16) (Bank 0)Main loopShow energy bomb effect, charge shields and energy banks
Main flight loop (Part 14 of 16) (Bank 0)Main loopSpawn a space station if we are close enough to the planet
Main flight loop (Part 15 of 16) (Bank 0)Main loopPerform altitude checks with the planet and sun and process fuel scooping if appropriate
Main flight loop (Part 16 of 16) (Bank 0)Main loopCall stardust routine
Main game loop (Part 1 of 6) (Bank 0)Main loopSpawn a trader (a Cobra Mk III, Python, Boa or Anaconda)
Main game loop (Part 2 of 6) (Bank 0)Main loopCall the main flight loop, and potentially spawn a trader, an asteroid, or a cargo canister
Main game loop (Part 3 of 6) (Bank 0)Main loopPotentially spawn a cop, particularly if we've been bad
Main game loop (Part 4 of 6) (Bank 0)Main loopPotentially spawn a lone bounty hunter, a Thargoid, or up to four pirates
Main game loop (Part 5 of 6) (Bank 0)Main loopCool down lasers, make calls to update the dashboard
Main game loop (Part 6 of 6) (Bank 0)Main loopProcess non-flight key presses (icon bar selections)
MakeHyperSound (Bank 7)SoundMake the hyperspace sound
MakeMusic (Bank 6)SoundPlay the current music on the SQ1, SQ2, TRI and NOISE channels
MakeMusicOnNOISE (Bank 6)SoundPlay the current music on the NOISE channel
MakeMusicOnSQ1 (Bank 6)SoundPlay the current music on the SQ1 channel
MakeMusicOnSQ2 (Bank 6)SoundPlay the current music on the SQ2 channel
MakeMusicOnTRI (Bank 6)SoundPlay the current music on the TRI channel
MakeScoopSound (Bank 7)SoundMake the sound of the fuel scoops working
MakeSound (Bank 6)SoundMake the current sound effects on the SQ1, SQ2 and NOISE channels
MakeSoundOnNOISE (Bank 6)SoundMake the current sound effect on the NOISE channel
MakeSoundOnSQ1 (Bank 6)SoundMake the current sound effect on the SQ1 channel
MakeSoundOnSQ2 (Bank 6)SoundMake the current sound effect on the SQ2 channel
MakeSounds (Bank 6)SoundMake the current sounds (music and sound effects)
MakeSounds_b6 (Bank 7)SoundCall the MakeSounds routine in ROM bank 6
MakeSoundsAtVBlank (Bank 7)SoundWait for the next VBlank and make the current sounds (music and sound effects)
MakeSoundsS (Bank 6)SoundA jump table entry at the start of bank 6 for the MakeSounds routine
MAL1 (Bank 0)Main loopMarks the beginning of the ship analysis loop, so we can jump back here from part 12 of the main flight loop to work our way through each ship in the local bubble. We also jump back here when a ship is removed from the bubble, so we can continue processing from the next ship
MANY (Common)Workspace variable The number of ships of each type in the local bubble of universe
MAS1 (Bank 0)Maths (Geometry)Add an orientation vector coordinate to an INWK coordinate
MAS2 (Bank 0)Maths (Geometry)Calculate a cap on the maximum distance to the planet or sun
MAS3 (Bank 0)Maths (Arithmetic)Calculate A = x_hi^2 + y_hi^2 + z_hi^2 in the K% block
MAS4 (Bank 0)Maths (Geometry)Calculate a cap on the maximum distance to a ship
maxNameTileToClear (Common)Workspace variable The tile number at which the NMI handler should stop clearing tiles in the nametable buffers during its clearing cycle
MCASH (Bank 0)Maths (Arithmetic)Add an amount of cash to the cash pot
MCNT (Common)Workspace variable The main loop counter
mes9 (Bank 0)FlightPrint a text token, possibly followed by " DESTROYED"
mes9+3 (Bank 0)FlightDon't print the text token, just print " DESTROYED" where applicable
MESS (Bank 0)FlightDisplay an in-flight message
messageBuffer (Common)Workspace variable A buffer for the in-flight message text
messageLength (Common)Workspace variable The length of the message stored in the message buffer
messXC (Common)Workspace variable Temporary storage, used to store the text column of the in-flight message in MESS, so it can be erased from the screen at the correct time
messYC (Common)Workspace variable Used to specify the text row of the in-flight message in MESS, so it can be shown at a different positions in different views
missileNames (Bank 7)DashboardTile numbers for the four missile indicators on the dashboard, as offsets from the start of tile row 22
missileNames_b6 (Bank 6)DashboardTile numbers for the four missile indicators on the dashboard, as offsets from the start of tile row 22
MJ (Common)Workspace variable Are we in witchspace (i.e. have we mis-jumped)?
MJP (Bank 0)FlightProcess a mis-jump into witchspace
MLOOP (Bank 0)Main loopThe entry point for the main game loop. This entry point comes after the call to the main flight loop and spawning routines, so it marks the start of the main game loop for when we are docked (as we don't need to call the main flight loop or spawning routines if we aren't in space)
MLS1 (Bank 7)Maths (Arithmetic)Calculate (A P) = ALP1 * A
MLS2 (Bank 7)Maths (Arithmetic)Calculate (S R) = XX(1 0) and (A P) = A * ALP1
MLTU2 (Bank 7)Maths (Arithmetic)Calculate (A P+1 P) = (A ~P) * Q
MLTU2-2 (Bank 7)Maths (Arithmetic)Set Q to X, so this calculates (A P+1 P) = (A ~P) * X
MLU1 (Bank 7)Maths (Arithmetic)Calculate Y1 = y_hi and (A P) = |y_hi| * Q for Y-th stardust
MLU2 (Bank 7)Maths (Arithmetic)Calculate (A P) = |A| * Q
MoveEquipmentDown (Bank 0)EquipmentMove the currently selected item down the list of equipment
MoveEquipmentUp (Bank 0)EquipmentMove the currently selected item up the list of equipment
MoveIconBarPointer (Bank 7)Icon barMove the sprites that make up the icon bar pointer and record any choices
MoveInLeftColumn (Bank 6)Save and loadProcess moving the highlight when it's in the left column (the current commander)
MoveInMiddleColumn (Bank 6)Save and loadProcess moving the highlight when it's in the middle column
MoveInRightColumn (Bank 6)Save and loadProcess moving the highlight when it's in the right column (the save slots)
MoveToLeftColumn (Bank 6)Save and loadMove the highlight to the left column (the current commander)
MSAR (Common)Workspace variable The targeting state of our leftmost missile
MSBAR (Bank 7)DashboardDraw a specific indicator in the dashboard's missile bar
MSBAR_b6 (Bank 6)DashboardDraw a specific indicator in the dashboard's missile bar
msblob (Bank 0)DashboardDisplay the dashboard's missile indicators in black or grey
MSTG (Common)Workspace variable The current missile lock target
MT1 (Bank 2)TextSwitch to ALL CAPS when printing extended tokens
MT13 (Bank 2)TextSwitch to lower case when printing extended tokens
MT14 (Bank 2)TextSwitch to justified text when printing extended tokens
MT15 (Bank 2)TextSwitch to left-aligned text when printing extended tokens
MT16 (Bank 2)TextPrint the character in variable DTW7
MT17 (Bank 2)TextPrint the selected system's adjective, e.g. Lavian for Lave
MT18 (Bank 2)TextPrint a random 1-8 letter word in Sentence Case
MT19 (Bank 2)TextCapitalise the next letter
MT2 (Bank 2)TextSwitch to Sentence Case when printing extended tokens
MT23 (Bank 2)TextMove to row 9 and switch to lower case when printing extended tokens
MT26 (Bank 2)TextPrint a space and capitalise the next letter
MT27 (Bank 2)TextPrint the captain's name during mission briefings
MT28 (Bank 2)TextPrint the location hint during the mission 1 briefing
MT29 (Bank 2)TextMove to row 7 and switch to lower case when printing extended tokens
MT5 (Bank 2)TextSwitch to extended tokens
MT6 (Bank 2)TextSwitch to standard tokens in Sentence Case
MT8 (Bank 2)TextTab to column 6 and start a new word when printing extended tokens
MT9 (Bank 2)TextClear the screen and set the view type for a text-based mission
MTIN (Bank 2)TextLookup table for random tokens in the extended token table (0-37)
MU1 (Bank 7)Maths (Arithmetic)Copy X into P and A, and clear the C flag
MU11 (Bank 7)Maths (Arithmetic)Calculate (A P) = P * X
MU5 (Bank 7)Maths (Arithmetic)Set K(3 2 1 0) = (A A A A) and clear the C flag
MU6 (Bank 7)Maths (Arithmetic)Set P(1 0) = (A A)
MULT1 (Bank 7)Maths (Arithmetic)Calculate (A P) = Q * A
MULT12 (Bank 7)Maths (Arithmetic)Calculate (S R) = Q * A
MULT3 (Bank 7)Maths (Arithmetic)Calculate K(3 2 1 0) = (A P+1 P) * Q
MULTS-2 (Bank 7)Maths (Arithmetic)Calculate (A P) = X * A
MULTU (Bank 7)Maths (Arithmetic)Calculate (A P) = P * Q
MUT1 (Bank 7)Maths (Arithmetic)Calculate R = XX and (A P) = Q * A
MUT2 (Bank 7)Maths (Arithmetic)Calculate (S R) = XX(1 0) and (A P) = Q * A
MUT3 (Bank 7)Maths (Arithmetic)An unused routine that does the same as MUT2
MV30 (Bank 0)MovingMove the ship in space but without tidying the orientation vectors or applying tactics
MV40 (Bank 0)MovingRotate the planet or sun's location in space by the amount of pitch and roll of our ship
MV45 (Bank 0)MovingRejoin the MVEIT routine after the rotation, tactics and scanner code
MVEIT (Part 1 of 9) (Bank 0)MovingMove current ship: Tidy the orientation vectors
MVEIT (Part 2 of 9) (Bank 0)MovingMove current ship: Call tactics routine, remove ship from scanner
MVEIT (Part 3 of 9) (Bank 0)MovingMove current ship: Move ship forward according to its speed
MVEIT (Part 4 of 9) (Bank 0)MovingMove current ship: Apply acceleration to ship's speed as a one-off
MVEIT (Part 5 of 9) (Bank 0)MovingMove current ship: Rotate ship's location by our pitch and roll
MVEIT (Part 6 of 9) (Bank 0)MovingMove current ship: Move the ship in space according to our speed
MVEIT (Part 7 of 9) (Bank 0)MovingMove current ship: Rotate ship's orientation vectors by pitch/roll
MVEIT (Part 8 of 9) (Bank 0)MovingMove current ship: Rotate ship about itself by its own pitch/roll
MVEIT (Part 9 of 9) (Bank 0)MovingMove current ship: Redraw on scanner, if it hasn't been destroyed
MVS4 (Bank 0)MovingApply pitch and roll to an orientation vector
MVS5 (Bank 0)MovingApply a 3.6 degree pitch or roll to an orientation vector
MVS5_b0 (Bank 7)MovingCall the MVS5 routine in ROM bank 0
MVT1 (Bank 0)MovingCalculate (x_sign x_hi x_lo) = (x_sign x_hi x_lo) + (A R)
MVT1-2 (Bank 0)MovingClear bits 0-6 of A before entering MVT1
MVT3 (Bank 0)MovingCalculate K(3 2 1) = (x_sign x_hi x_lo) + K(3 2 1)
MVT6 (Bank 0)MovingCalculate (A P+2 P+1) = (x_sign x_hi x_lo) + (A P+2 P+1)
NA2% (Bank 6)Save and loadThe data block for the default commander
NAME (Common)Workspace variable The current commander name
nameBuffer0 (Common)Workspace variable The buffer for nametable 0 that gets sent to the PPU during VBlank
nameBuffer1 (Common)Workspace variable The buffer for nametable 1 that gets sent to the PPU during VBlank
nameBufferHi (Common)Workspace variable High byte of the address of the current nametable buffer ($70 or $74)
nameBufferHiAddr (Bank 7)Drawing the screenThe high bytes of the addresses of the two nametable buffers
nameTileBuffHi (Common)Workspace variable (nameTileBuffHi nameTileBuffLo) contains the address of the nametable buffer for the tile we are sending to the PPU from bitplane 0 (i.e. for tile number sendingNameTile in bitplane 0)
nameTileBuffLo (Common)Workspace variable (nameTileBuffHi nameTileBuffLo) contains the address of the nametable buffer for the tile we are sending to the PPU from bitplane 0 (i.e. for tile number sendingNameTile in bitplane 0)
nameTileCounter (Common)Workspace variable Counts tiles as they are written to the PPU nametable in the NMI handler
NEWB (Common)Workspace variable The ship's "new byte flags" (or NEWB flags)
newTune (Common)Workspace variable The number of the new tune when choosing the background music
newzp (Common)Workspace variable This is used by the STARS2 routine for storing the stardust particle's delta_x value
nextSectionNOISE (Common)Workspace variable The next section for the NOISE channel of the current tune
nextSectionSQ1 (Common)Workspace variable The next section for the SQ1 channel of the current tune
nextSectionSQ2 (Common)Workspace variable The next section for the SQ2 channel of the current tune
nextSectionTRI (Common)Workspace variable The next section for the TRI channel of the current tune
NLIN2 (Bank 7)Drawing linesDraw a horizontal line on tile row 2 to box in a title
NLIN3 (Bank 7)Drawing linesPrint a title and draw a screen-wide horizontal line on tile row 2 to box it in
NLIN4 (Bank 7)Drawing linesDraw a horizontal line on tile row 2 to box in a title
NMI (Bank 7)Utility routinesThe NMI interrupt handler that gets called every VBlank and which updates the screen, reads the controllers and plays music
nmiBitplane (Common)Workspace variable The number of the bitplane (0 or 1) that is currently being processed in the NMI handler during VBlank
nmiBitplane8 (Common)Workspace variable Used when sending patterns to the PPU to calculate the address offset of bitplanes 0 and 1
nmiCounter (Common)Workspace variable A counter that increments every VBlank at the start of the NMI handler
nmiStoreA (Common)Workspace variable Temporary storage for the A register during NMI
nmiStoreX (Common)Workspace variable Temporary storage for the X register during NMI
nmiStoreY (Common)Workspace variable Temporary storage for the Y register during NMI
nmiTimer (Common)Workspace variable A counter that gets decremented each time the NMI interrupt is called, starting at 50 and counting down to zero, at which point it jumps back up to 50 again and triggers an increment of (nmiTimerHi nmiTimerLo)
nmiTimerHi (Common)Workspace variable High byte of a counter that's incremented by 1 every time nmiTimer wraps
nmiTimerLo (Common)Workspace variable Low byte of a counter that's incremented by 1 every time nmiTimer wraps
NO1 (Bank 7)Maths (Geometry)Contains an RTS
NOFX (Bank 6)Combat demoThe x-coordinates of the scroll text letter grid
NOFY (Bank 6)Combat demoThe y-coordinates of the scroll text letter grid
NOISE (Bank 7)SoundMake the sound effect whose number is in Y
noiseLo (Common)Workspace variable The value that we are going to send to the APU via NOISE_LO for the current tune
noiseLoCopy (Common)Workspace variable A copy of the value that we are going to send to the APU via NOISE_LO for the current tune
noiseVolume (Common)Workspace variable The value that we are going to send to the APU via NOISE_VOL for the current tune
NOMSL (Common)Workspace variable The number of missiles we have fitted (0-4)
NORM (Bank 7)Maths (Geometry)Normalise the three-coordinate vector in XX15
NOSTM (Common)Workspace variable The number of stardust particles shown on screen, which is 20 (#NOST) for normal space, and 3 for witchspace
noteFrequency (Bank 6)SoundA table of note frequencies
NRU (Bank 2)TextThe number of planetary systems with extended system description overrides in the RUTOK table (NRU%) in three different languages
numberOfPilots (Common)Workspace variable A flag to determine whether the game is configured for one or two pilots
nWq (Bank 0)StardustCreate a random cloud of stardust
NwS1 (Bank 0)UniverseFlip the sign and double an INWK byte
NWSHP (Bank 0)UniverseAdd a new ship to our local bubble of universe
NWSPS (Bank 0)UniverseAdd a new space station to our local bubble of universe
NWSTARS (Bank 0)StardustInitialise the stardust field
oh (Bank 0)Drawing the screenContains an RTS
OOPS (Bank 0)FlightTake some damage
OTHERFILEPR (Bank 2)Save and loadDisplay the non-selected media (disc or tape)
ou2 (Bank 0)FlightDisplay "E.C.M.SYSTEM DESTROYED" as an in-flight message
ou3 (Bank 0)FlightDisplay "FUEL SCOOPS DESTROYED" as an in-flight message
OUCH (Bank 0)FlightPotentially lose cargo or equipment following damage
ouch1 (Bank 0)FlightPrint the token in A as an in-flight message
P (Common)Workspace variable Temporary storage, used in a number of places
paletteColour2 (Common)Workspace variable Contains the colour to use for palette entry 2 in the current (non-space) view
paletteColour3 (Common)Workspace variable Contains the colour to use for palette entry 3 in the current (non-space) view
paletteForView (Bank 3)Drawing the screenPalette numbers for each view
PAS1 (Bank 0)MissionsDisplay a rotating ship at space coordinates (0, 100, 256) and scan the controllers
PAS1_b0 (Bank 7)MissionsCall the PAS1 routine in ROM bank 0
pattBuffer0 (Common)Workspace variable The pattern buffer for bitplane 0 (1 bit per pixel) that gets sent to the PPU during VBlank
pattBuffer1 (Common)Workspace variable The pattern buffer for bitplane 1 (1 bit per pixel) that gets sent to the PPU during VBlank
pattBufferAddr (Common)Workspace variable Address of the current pattern buffer:
pattBufferHiAddr (Bank 7)Drawing the screenThe high bytes of the addresses of the two pattern buffers
pattBufferHiDiv8 (Common)Workspace variable High byte of the address of the current pattern buffer ($60 or $68) divided by 8
patternBufferHi (Common)Workspace variable (patternBufferHi patternBufferLo) contains the address of the pattern buffer for the pattern we are sending to the PPU from bitplane 0 (i.e. for pattern number sendingPattern in bitplane 0)
patternBufferLo (Common)Workspace variable (patternBufferHi patternBufferLo) contains the address of the pattern buffer for the pattern we are sending to the PPU from bitplane 0 (i.e. for pattern number sendingPattern in bitplane 0)
patternCounter (Common)Workspace variable Counts patterns as they are written to the PPU pattern table in the NMI handler
pattSprite0 (Common)Workspace variable Pattern number for sprite 0
pattSprite1 (Common)Workspace variable Pattern number for sprite 1
pattSprite10 (Common)Workspace variable Pattern number for sprite 10
pattSprite11 (Common)Workspace variable Pattern number for sprite 11
pattSprite12 (Common)Workspace variable Pattern number for sprite 12
pattSprite13 (Common)Workspace variable Pattern number for sprite 13
pattSprite14 (Common)Workspace variable Pattern number for sprite 14
pattSprite15 (Common)Workspace variable Pattern number for sprite 15
pattSprite16 (Common)Workspace variable Pattern number for sprite 16
pattSprite17 (Common)Workspace variable Pattern number for sprite 17
pattSprite18 (Common)Workspace variable Pattern number for sprite 18
pattSprite19 (Common)Workspace variable Pattern number for sprite 19
pattSprite2 (Common)Workspace variable Pattern number for sprite 2
pattSprite20 (Common)Workspace variable Pattern number for sprite 20
pattSprite21 (Common)Workspace variable Pattern number for sprite 21
pattSprite22 (Common)Workspace variable Pattern number for sprite 22
pattSprite23 (Common)Workspace variable Pattern number for sprite 23
pattSprite24 (Common)Workspace variable Pattern number for sprite 24
pattSprite25 (Common)Workspace variable Pattern number for sprite 25
pattSprite26 (Common)Workspace variable Pattern number for sprite 26
pattSprite27 (Common)Workspace variable Pattern number for sprite 27
pattSprite28 (Common)Workspace variable Pattern number for sprite 28
pattSprite29 (Common)Workspace variable Pattern number for sprite 29
pattSprite3 (Common)Workspace variable Pattern number for sprite 3
pattSprite30 (Common)Workspace variable Pattern number for sprite 30
pattSprite31 (Common)Workspace variable Pattern number for sprite 31
pattSprite32 (Common)Workspace variable Pattern number for sprite 32
pattSprite33 (Common)Workspace variable Pattern number for sprite 33
pattSprite34 (Common)Workspace variable Pattern number for sprite 34
pattSprite35 (Common)Workspace variable Pattern number for sprite 35
pattSprite36 (Common)Workspace variable Pattern number for sprite 36
pattSprite37 (Common)Workspace variable Pattern number for sprite 37
pattSprite38 (Common)Workspace variable Pattern number for sprite 38
pattSprite39 (Common)Workspace variable Pattern number for sprite 39
pattSprite4 (Common)Workspace variable Pattern number for sprite 4
pattSprite40 (Common)Workspace variable Pattern number for sprite 40
pattSprite41 (Common)Workspace variable Pattern number for sprite 41
pattSprite42 (Common)Workspace variable Pattern number for sprite 42
pattSprite43 (Common)Workspace variable Pattern number for sprite 43
pattSprite44 (Common)Workspace variable Pattern number for sprite 44
pattSprite45 (Common)Workspace variable Pattern number for sprite 45
pattSprite46 (Common)Workspace variable Pattern number for sprite 46
pattSprite47 (Common)Workspace variable Pattern number for sprite 47
pattSprite48 (Common)Workspace variable Pattern number for sprite 48
pattSprite49 (Common)Workspace variable Pattern number for sprite 49
pattSprite5 (Common)Workspace variable Pattern number for sprite 5
pattSprite50 (Common)Workspace variable Pattern number for sprite 50
pattSprite51 (Common)Workspace variable Pattern number for sprite 51
pattSprite52 (Common)Workspace variable Pattern number for sprite 52
pattSprite53 (Common)Workspace variable Pattern number for sprite 53
pattSprite54 (Common)Workspace variable Pattern number for sprite 54
pattSprite55 (Common)Workspace variable Pattern number for sprite 55
pattSprite56 (Common)Workspace variable Pattern number for sprite 56
pattSprite57 (Common)Workspace variable Pattern number for sprite 57
pattSprite58 (Common)Workspace variable Pattern number for sprite 58
pattSprite59 (Common)Workspace variable Pattern number for sprite 59
pattSprite6 (Common)Workspace variable Pattern number for sprite 6
pattSprite60 (Common)Workspace variable Pattern number for sprite 60
pattSprite61 (Common)Workspace variable Pattern number for sprite 61
pattSprite62 (Common)Workspace variable Pattern number for sprite 62
pattSprite63 (Common)Workspace variable Pattern number for sprite 63
pattSprite7 (Common)Workspace variable Pattern number for sprite 7
pattSprite8 (Common)Workspace variable Pattern number for sprite 8
pattSprite9 (Common)Workspace variable Pattern number for sprite 9
PAUSE (Bank 2)MissionsDisplay a rotating ship, waiting until a key is pressed, then remove the ship from the screen
PAUSE2 (Bank 2)ControllersWait until a key is pressed, ignoring any existing key press
pauseCountNOISE (Common)Workspace variable Pause for this many iterations before continuing to process note data on channel NOISE, decrementing the value for each paused iteration
pauseCountSQ1 (Common)Workspace variable Pause for this many iterations before continuing to process note data on channel SQ1, decrementing the value for each paused iteration
pauseCountSQ2 (Common)Workspace variable Pause for this many iterations before continuing to process note data on channel SQ2, decrementing the value for each paused iteration
pauseCountTRI (Common)Workspace variable Pause for this many iterations before continuing to process note data on channel TRI, decrementing the value for each paused iteration
PauseGame (Bank 6)Icon barPause the game and process choices from the pause menu until the game is unpaused by another press of Start
PauseGame_b6 (Bank 7)Icon barCall the PauseGame routine in ROM bank 6
PCASH (Bank 0)StatusPrint the amount of cash only
PDESC (Bank 2)UniversePrint the system's extended description or a mission 1 directive
PDESC_b2 (Bank 7)TextCall the PDESC routine in ROM bank 2
picturePattern (Common)Workspace variable The number of the first free pattern where commander and system images can be stored in the buffers
ping (Bank 0)UniverseSet the selected system to the current system
pitchEnvelope (Bank 6)SoundPitch envelope data for the game music
pitchEnvelopeNOISE (Common)Workspace variable The number of the pitch envelope to be applied to the current tune on channel NOISE
pitchEnvelopeSQ1 (Common)Workspace variable The number of the pitch envelope to be applied to the current tune on channel SQ1
pitchEnvelopeSQ2 (Common)Workspace variable The number of the pitch envelope to be applied to the current tune on channel SQ2
pitchEnvelopeTRI (Common)Workspace variable The number of the pitch envelope to be applied to the current tune on channel TRI
pitchIndexNOISE (Common)Workspace variable The index of the entry within the pitch envelope to be applied to the current tune on channel NOISE
pitchIndexSQ1 (Common)Workspace variable The index of the entry within the pitch envelope to be applied to the current tune on channel SQ1
pitchIndexSQ2 (Common)Workspace variable The index of the entry within the pitch envelope to be applied to the current tune on channel SQ2
pitchIndexTRI (Common)Workspace variable The index of the entry within the pitch envelope to be applied to the current tune on channel TRI
PIXEL (Bank 7)Drawing pixelsDraw a 1-pixel dot
PIXEL2 (Bank 1)Drawing pixelsDraw a stardust particle relative to the screen centre
pixl2 (Bank 7)Drawing pixelsRestore the value of Y and return from the subroutine
PL21 (Bank 1)Drawing planetsReturn from a planet/sun-drawing routine with a failure flag
PL21S-1 (Bank 7)Drawing planetsSet the C flag and return from the subroutine
PL40 (Bank 1)Drawing planetsContains an RTS
PL44 (Bank 1)Drawing planetsReturn from a planet/sun-drawing routine with a success flag
PL9 (Part 1 of 3) (Bank 1)Drawing planetsDraw the planet, with either an equator and meridian, or a crater
PL9 (Part 2 of 3) (Bank 1)Drawing planetsDraw the planet's equator and meridian
PL9 (Part 3 of 3) (Bank 1)Drawing planetsDraw the planet's crater
PLANET (Bank 1)Drawing planetsDraw the planet or sun
PlayDemo (Bank 0)Combat demoPlay the combat demo
PlayDemo_b0 (Bank 7)Combat demoCall the PlayDemo routine in ROM bank 0
playMusic (Common)Workspace variable Controls whether to keep playing the current tune:
plf (Bank 0)TextPrint a text token followed by a newline
PLFL (Bank 1)Drawing sunsCalculate the sun's width on a given pixel row
PLS1 (Bank 1)Drawing planetsCalculate (Y A) = nosev_x / z
PLS2 (Bank 1)Drawing planetsDraw a half-ellipse
PLS22 (Bank 1)Drawing planetsDraw an ellipse or half-ellipse
PLS3 (Bank 1)Drawing planetsCalculate (Y A P) = 222 * roofv_x / z
PLS4 (Bank 1)Drawing planetsCalculate CNT2 = arctan(P / A) / 4
PLS5 (Bank 1)Drawing planetsCalculate roofv_x / z and roofv_y / z
PLS6 (Bank 7)Drawing planetsCalculate (X K) = (A P) / (z_sign z_hi z_lo)
PLUT (Bank 0)FlightFlip the coordinate axes for the four different views
pointerMoveCounter (Common)Workspace variable The position of the icon bar pointer as it moves between icons, counting down from 12 (at the start of the move) to 0 (at the end of the move)
pointerPressedB (Common)Workspace variable Controls whether the MoveIconBarPointer routine looks for a second tap of the B button when trying to detect a double-tap on the B button
pointerTimer (Common)Workspace variable A timer that counts down by 1 on each call to the MoveIconBarPointer routine, so that a double-tap on the B button can be interpreted as such
pointerTimerB (Common)Workspace variable A timer used in the PAL version to detect the B button being pressed twice in quick succession (a double-tap)
popupWidth (Bank 0)EquipmentThe width of the popup that shows the views available for installing lasers in the Equipment screen
ppuCtrlCopy (Common)Workspace variable Contains a copy of PPU_CTRL, so we can check the PPU configuration without having to access the PPU
ppuNametableAddr (Common)Workspace variable Address of the current PPU nametable:
ppuPatternTableHi (Common)Workspace variable High byte of the address of the PPU pattern table to which we send patterns
ppuToBuffNameHi (Common)Workspace variable A high byte that we can add to an address in nametable buffer 0 to get the corresponding address in the PPU nametable
pr2 (Bank 0)TextPrint an 8-bit number, left-padded to 3 digits, and optional point
pr2+2 (Bank 0)TextPrint the 8-bit number in X to the number of digits in A
pr5 (Bank 0)TextPrint a 16-bit number, left-padded to 5 digits, and optional point
pr6 (Bank 0)TextPrint 16-bit number, left-padded to 5 digits, no point
pres (Bank 0)EquipmentGiven an item number A with the item name in recursive token Y, show an error to say that the item is already present, refund the cost of the item, and then beep and exit to the docking bay (i.e. show the Status Mode screen)
previousCondition (Common)Workspace variable Used to store the ship's previous status condition (i.e. docked, green, yellow or red), so we can tell how the situation is changing
priceDebug (Common)Workspace variable This is only referenced by some disabled test code in the prx routine, where it was presumably used for testing different equipment prices
Print2Spaces (Bank 0)TextPrint two spaces
Print4Spaces (Bank 0)TextAn unused routine that prints four spaces
PrintCash (Bank 0)MarketPrint our cash levels in the correct place for the chosen language
PrintCharacter (Bank 0)TextAn unused routine that prints a character and sets the C flag
PrintCombatRank (Bank 0)StatusPrint the current combat rank
PrintCommanderName (Bank 6)Save and loadPrint the commander name from the commander file in BUF, with the save count added to the end
PrintCrTab (Bank 0)TextPrint a newline and the correct indent for Status Mode entries in the chosen language
PrintCtrlCode (Bank 0)TextPrint a control code (in the range 0 to 9)
PrintCtrlCode_b0 (Bank 7)TextCall the PrintCtrlCode routine in ROM bank 0
PrintEquipment (Bank 0)EquipmentPrint the name and price for a specified item of equipment
PrintEquipment+2 (Bank 0)EquipmentPrint the item number in X
PrintFlightMessage (Bank 0)TextPrint an in-flight message
PrintLaserView (Bank 0)EquipmentPrint the name of a laser view in the laser-buying popup, filled to the right by the correct number of spaces to fill the popup
PrintLegalStatus (Bank 0)StatusPrint the current legal status (clean, offender or fugitive)
PrintMarketItem (Bank 0)MarketPrint the name, price and availability of a market item on the correct row for the chosen language
PrintMessage (Bank 0)TextPrint a message in the middle of the screen (used for "GAME OVER" and demo missile messages only)
PrintNameInMiddle (Bank 6)Save and loadPrint the commander name in the middle column using the highlight font
PrintNumberInHold (Bank 0)MarketPrint the number of units of a specified item that we have in the hold
PrintSaveHeader (Bank 6)Save and loadPrint header text for the Save and Load screen
PrintSaveName (Bank 6)Save and loadPrint the name of a specific save slot
PrintSpaceAndToken (Bank 0)TextPrint a space followed by a text token
PrintSpacedHyphen (Bank 0)TextPrint two spaces, then a "-", and then another two spaces
PrintSpaceViewName (Bank 0)TextPrint the name of the current space view
PrintTokenAndColon (Bank 0)TextPrint a character followed by a colon, ensuring that the colon is always drawn in colour 3 on a black background
PrintTokenCrTab (Bank 0)TextPrint a token, a newline and the correct indent for Status Mode entries in the chosen language
PROJ (Bank 7)Maths (Geometry)Project the current ship or planet onto the screen
ProjectScrollText (Bank 6)Combat demoProject a scroll text coordinate onto the screen
prq (Bank 0)TextPrint a text token followed by a question mark
prx (Bank 0)EquipmentReturn the price of a piece of equipment
prx-3 (Bank 0)EquipmentReturn the price of the item with number A - 1 c Contains an RTS
PRXS (Bank 0)EquipmentEquipment prices
Q (Common)Workspace variable Temporary storage, used in a number of places
QQ0 (Common)Workspace variable The current system's galactic x-coordinate (0-256)
QQ1 (Common)Workspace variable The current system's galactic y-coordinate (0-256)
QQ10 (Common)Workspace variable The galactic y-coordinate of the crosshairs in the galaxy chart (and, most of the time, the selected system's galactic y-coordinate)
QQ11 (Common)Workspace variable This contains the type of the current view (or, if we are changing views, the type of the view we are changing to)
QQ11a (Common)Workspace variable Contains the old view type when changing views
QQ12 (Common)Workspace variable Our "docked" status
QQ14 (Common)Workspace variable Our current fuel level (0-70)
QQ15 (Common)Workspace variable The three 16-bit seeds for the selected system, i.e. the one in the crosshairs in the Short-range Chart
QQ16 (Bank 2)TextThe two-letter token lookup table
QQ17 (Common)Workspace variable Contains a number of flags that affect how text tokens are printed, particularly capitalisation:
QQ18 (Bank 2)TextThe recursive token table for tokens 0-148
QQ18_DE (Bank 2)TextThe recursive token table for tokens 0-148 (German)
QQ18_FR (Bank 2)TextThe recursive token table for tokens 0-148 (French)
QQ18Hi (Common)Workspace variable Gets set to the high byte of the address of the text token table used by the ex routine (QQ18)
QQ18Lo (Common)Workspace variable Gets set to the low byte of the address of the text token table used by the ex routine (QQ18)
QQ19 (Common)Workspace variable Temporary storage, used in a number of places
QQ2 (Common)Workspace variable The three 16-bit seeds for the current system, i.e. the one we are currently in
QQ20 (Common)Workspace variable The contents of our cargo hold
QQ21 (Common)Workspace variable The three 16-bit seeds for the current galaxy
QQ22 (Common)Workspace variable The two hyperspace countdown counters
QQ23 (Bank 0)MarketMarket prices table
QQ24 (Common)Workspace variable Temporary storage, used to store the current market item's price in routine TT151
QQ25 (Common)Workspace variable Temporary storage, used to store the current market item's availability in routine TT151
QQ26 (Common)Workspace variable A random value used to randomise market data
QQ28 (Common)Workspace variable The current system's economy (0-7)
QQ29 (Common)Workspace variable Temporary storage, used in a number of places
QQ3 (Common)Workspace variable The selected system's economy (0-7)
QQ4 (Common)Workspace variable The selected system's government (0-7)
QQ5 (Common)Workspace variable The selected system's tech level (0-14)
QQ6 (Common)Workspace variable The selected system's population in billions * 10 (1-71), so the maximum population is 7.1 billion
QQ7 (Common)Workspace variable The selected system's productivity in M CR (96-62480)
QQ8 (Common)Workspace variable The distance from the current system to the selected system in light years * 10, stored as a 16-bit number
QQ9 (Common)Workspace variable The galactic x-coordinate of the crosshairs in the galaxy chart (and, most of the time, the selected system's galactic x-coordinate)
qv (Bank 0)EquipmentPrint a popup menu of the four space views, for buying lasers
qw (Bank 2)TextPrint a recursive token in the range 128-145
R (Common)Workspace variable Temporary storage, used in a number of places
radiusText (Bank 0)UniverseThe text string "RADIUS" for use in the Data on System screen
RAND (Common)Workspace variable Four 8-bit seeds for the random number generation system implemented in the DORND routine
RAT (Common)Workspace variable Used to store different signs depending on the current space view, for use in calculating stardust movement
RAT2 (Common)Workspace variable Temporary storage, used to store the pitch and roll signs when moving objects and stardust
RE2+2 (Bank 7)DashboardRestore A from T and return from the subroutine
ReadControllers (Bank 7)ControllersRead the buttons on the controllers and update the control variables
RedrawCurrentView (Bank 0)Drawing the screenUpdate the current view when we arrive in a new system
REDU2 (Bank 7)DashboardReduce the value of the pitch or roll dashboard indicator
refund (Bank 0)EquipmentInstall a new laser, processing a refund if applicable
RemoveShip (Bank 0)UniverseFetch a ship data block and remove that ship from our local bubble of universe
RES2 (Bank 0)Start and endReset a number of flight variables and workspaces
RESET (Bank 0)Start and endReset most variables
ResetBank (Bank 7)Utility routinesRetrieve a ROM bank number from the stack and page that bank into memory at $8000
ResetBankA (Bank 7)Utility routinesPage a specified bank into memory at $8000 while preserving the value of A
ResetBankP (Bank 7)Utility routinesPage a specified bank into memory at $8000 while preserving the value of A and the processor flags
ResetBuffers (Bank 7)Drawing the screenReset the pattern and nametable buffers
ResetCommander (Bank 6)Save and loadReset the current commander to the default "JAMESON" commander
ResetCommander_b6 (Bank 7)Save and loadCall the ResetCommander routine in ROM bank 6
ResetMMC1 (Bank 0)Start and endThe MMC1 mapper reset routine at the start of the ROM bank
ResetMMC1 (Bank 1)Start and endThe MMC1 mapper reset routine at the start of the ROM bank
ResetMMC1 (Bank 2)Start and endThe MMC1 mapper reset routine at the start of the ROM bank
ResetMMC1 (Bank 3)Start and endThe MMC1 mapper reset routine at the start of the ROM bank
ResetMMC1 (Bank 4)Start and endThe MMC1 mapper reset routine at the start of the ROM bank
ResetMMC1 (Bank 5)Start and endThe MMC1 mapper reset routine at the start of the ROM bank
ResetMMC1 (Bank 6)Start and endThe MMC1 mapper reset routine at the start of the ROM bank
ResetMMC1_b7 (Bank 7)Start and endThe MMC1 mapper reset routine at the start of the ROM bank
ResetMusic (Bank 7)SoundReset the current tune to the default and stop all sounds (music and sound effects)
ResetMusicAfterNMI (Bank 7)SoundWait for the next NMI before resetting the current tune to 0 and stopping the music
ResetOptions (Bank 7)Start and endReset the game options to their default values
ResetSaveBuffer (Bank 6)Save and loadReset the commander file buffer at BUF to the default commander
ResetSaveBuffer+1 (Bank 6)Save and loadOmit the initial PHA (so we can jump here if the value of the preserved A is already on the stack from another routine)
ResetSaveSlots (Bank 6)Save and loadReset the save slots for all eight save slots, so they will fail their checksums and get reset when they are next checked
ResetScanner (Bank 3)DashboardReset the sprites used for drawing ships on the scanner
ResetScanner_b3 (Bank 7)DashboardCall the ResetScanner routine in ROM bank 3
ResetScreen (Bank 3)Start and endReset the screen by clearing down the PPU, setting all colours to black, and resetting the screen-related variables
ResetScreen_b3 (Bank 7)Start and endCall the ResetScreen routine in ROM bank 3
ResetShipStatus (Bank 0)FlightReset the ship's speed, hyperspace counter, laser temperature, shields and energy banks
ResetStardust (Bank 0)StardustHide the sprites for the stardust
ResetToStartScreen (Bank 7)Start and endReset the stack and the game's variables and show the Start screen
ResetVariables (Bank 7)Start and endReset all the RAM (in both the NES and cartridge), initialise all the game's variables, and switch to ROM bank 0
ReturnFromSearch (Bank 0)Icon barRe-entry point following a system search in HME2
RTOK (Common)TextMacro definition for recursive tokens in the recursive token table
RTS1 (Bank 7)PPUContains an RTS
RTS10 (Bank 6)Combat demoContains an RTS
RTS2 (Bank 1)Drawing sunsContains an RTS
RTS3 (Bank 7)ControllersContains an RTS
RTS4 (Bank 7)Utility routinesContains an RTS
RTS5 (Bank 0)TextContains an RTS
RTS6 (Bank 0)UniverseContains an RTS
RTS7 (Bank 1)Drawing sunsContains an RTS DrawSunEdge Draw a sun line from (X1, Y) to (X2, Y)
RTS8 (Bank 7)SoundContains an RTS
RTS9 (Bank 3)Icon barContains an RTS
RUGAL (Bank 2)TextThe criteria for systems with extended description overrides
RUGAL_DE (Bank 2)TextThe criteria for systems with extended description overrides (German)
RUGAL_FR (Bank 2)TextThe criteria for systems with extended description overrides (French)
rugalHi (Bank 2)TextAddress lookup table for the RUGAL text token table in three different languages (high byte)
rugalLo (Bank 2)TextAddress lookup table for the RUGAL text token table in three different languages (low byte)
RunDemoFlightLoop (Bank 0)Combat demoRun a fixed number of iterations of the main flight loop for the combat demo
runningSetBank (Common)Workspace variable A flag that records whether we are in the process of switching ROM banks in the SetBank routine when the NMI handler is called
RUPLA (Bank 2)TextSystem numbers that have extended description overrides
RUPLA_DE (Bank 2)TextSystem numbers that have extended description overrides (German)
RUPLA_FR (Bank 2)TextSystem numbers that have extended description overrides (French)
ruplaHi (Bank 2)TextAddress lookup table for the RUPLA text token table in three different languages (high byte)
ruplaLo (Bank 2)TextAddress lookup table for the RUPLA text token table in three different languages (low byte)
RUTOK (Bank 2)TextThe second extended token table for recursive tokens 0-26 (DETOK3)
RUTOK_DE (Bank 2)TextThe second extended token table for recursive tokens 0-26 (DETOK3) (German)
RUTOK_FR (Bank 2)TextThe second extended token table for recursive tokens 0-26 (DETOK3) (French)
rutokHi (Bank 2)TextAddress lookup table for the RUTOK text token table in three different languages (high byte)
rutokLo (Bank 2)TextAddress lookup table for the RUTOK text token table in three different languages (low byte)
S (Common)Workspace variable Temporary storage, used in a number of places
safehouse (Common)Workspace variable Backup storage for the seeds for the selected system
saveBracketPatts (Bank 6)Save and loadPattern numbers for the bracket on the Save and Load screen
saveHeader1_DE (Bank 6)Save and loadThe Save and Load screen title in German
saveHeader1_EN (Bank 6)Save and loadThe Save and Load screen title in English
saveHeader1_FR (Bank 6)Save and loadThe Save and Load screen title in French
saveHeader1Hi (Bank 6)Save and loadLookup table for the high byte of the address of the saveHeader1 text for each language
saveHeader1Lo (Bank 6)Save and loadLookup table for the low byte of the address of the saveHeader1 text for each language
saveHeader2_DE (Bank 6)Save and loadThe subheaders for the Save and Load screen title in German
saveHeader2_EN (Bank 6)Save and loadThe subheaders for the Save and Load screen title in English
saveHeader2_FR (Bank 6)Save and loadThe subheaders for the Save and Load screen title in French
saveHeader2Hi (Bank 6)Save and loadLookup table for the high byte of the address of the saveHeader2 text for each language
saveHeader2Lo (Bank 6)Save and loadLookup table for the low byte of the address of the saveHeader2 text for each language
SaveLoadCommander (Bank 6)Save and loadEither save the commander from BUF into a save slot, or load the commander from BUF into the game and start the game
saveSlotAddr1 (Bank 6)Save and loadThe address of the first saved part for each save slot
saveSlotAddr2 (Bank 6)Save and loadThe address of the second saved part for each save slot
saveSlotAddr3 (Bank 6)Save and loadThe address of the third saved part for each save slot
saveSlotPart1 (Common)Workspace variable The first part of each of the eight save slots, which are split into three for checksum purposes
saveSlotPart2 (Common)Workspace variable The second part of each of the eight save slots, which are split into three for checksum purposes
saveSlotPart3 (Common)Workspace variable The third part of each of the eight save slots, which are split into three for checksum purposes
SC (Common)Workspace variable Screen address (low byte)
SC2 (Common)Workspace variable Temporary storage, typically used to store an address when writing data to the PPU or into the buffers
SC3 (Common)Workspace variable Temporary storage, used to store an address in the pattern buffers when drawing horizontal lines
scacol (Bank 0)Drawing shipsShip colours on the scanner
SCAN (Bank 1)DashboardDisplay the current ship on the scanner
SCAN_b1 (Bank 7)DashboardCall the SCAN routine in ROM bank 1
ScanButtons (Bank 7)ControllersScan a specific controller and update the control variables
scannerColour (Common)Workspace variable The colour of each ship number on the scanner, stored as the sprite palette number for that ship's three scanner sprites
scannerNumber (Common)Workspace variable Details of which scanner numbers are allocated to ships on the scanner
SCH (Common)Workspace variable Screen address (high byte)
screenFadedToBlack (Common)Workspace variable Records whether the screen has been faded to black
screenHeight (Common)Workspace variable The height of the drawable part of the screen in pixels (can be 144, 154 or 208 pixels)
screenReset (Common)Workspace variable Gets set to 245 when the screen is reset, but this value is only read once (in SetupViewInNMI) and the value is ignored, so this doesn't have any effect
scrollProgress (Common)Workspace variable Keeps track of the progress of the demo scroll text, starting from zero and increasing as the text scrolls up the screen
scrollText1_DE (Bank 6)Combat demoText for the first scroll text in German
scrollText1_EN (Bank 6)Combat demoText for the first scroll text in English
scrollText1_FR (Bank 6)Combat demoText for the first scroll text in French
scrollText1Hi (Bank 6)Combat demoLookup table for the high byte of the address of the scrollText1 text for each language
scrollText1Lo (Bank 6)Combat demoLookup table for the low byte of the address of the scrollText1 text for each language
scrollText2_DE (Bank 6)Combat demoText for the second scroll text in German
scrollText2_EN (Bank 6)Combat demoText for the second scroll text in English
scrollText2_FR (Bank 6)Combat demoText for the second scroll text in French
scrollText2Hi (Bank 6)Combat demoLookup table for the high byte of the address of the scrollText2 text for each language
scrollText2Lo (Bank 6)Combat demoLookup table for the low byte of the address of the scrollText2 text for each language
scrollTextSpeed (Common)Workspace variable Controls the speed of the scroll text in the demo
ScrollTextUpScreen (Bank 6)Combat demoGo through the line y-coordinate table at Y1TB, moving each line coordinate up the screen by W2Y (i.e. by one full line of text)
sectionDataNOISE (Common)Workspace variable The address of the note data for channel NOISE of the the current section of the current tune
sectionDataSQ1 (Common)Workspace variable The address of the note data for channel SQ1 of the the current section of the current tune
sectionDataSQ2 (Common)Workspace variable The address of the note data for channel SQ2 of the the current section of the current tune
sectionDataTRI (Common)Workspace variable The address of the note data for channel TRI of the the current section of the current tune
sectionListNOISE (Common)Workspace variable The address of the section list for channel NOISE of the current tune
sectionListSQ1 (Common)Workspace variable The address of the section list for channel SQ1 of the current tune
sectionListSQ2 (Common)Workspace variable The address of the section list for channel SQ2 of the current tune
sectionListTRI (Common)Workspace variable The address of the section list for channel TRI of the current tune
selectedSystem (Common)Workspace variable The three 16-bit seeds for the selected system, i.e. the one we most recently snapped the crosshairs to in a chart view
selectedSystemFlag (Common)Workspace variable Flags for the currently selected system
SelectNearbySystem (Bank 0)UniverseSet the current system to the nearest system and update the selected system flags accordingly
SEND_DATA_TO_PPU (Common)Drawing the screenSend a specified block of memory to the PPU
SendBarNamesToPPU (Bank 7)PPUSend the nametable entries for the icon bar to the PPU
SendBarNamesToPPUS (Bank 7)PPUSend the nametable entries for the icon bar to the PPU (this is a jump so we can call this routine using a branch instruction)
SendBarPatts2ToPPU (Bank 7)PPUSend pattern data for tiles 64-127 for the icon bar to the PPU, split across multiple calls to the NMI handler if required
SendBarPattsToPPU (Bank 7)PPUSend pattern data for tiles 0-127 for the icon bar to the PPU, split across multiple calls to the NMI handler if required
SendBarPattsToPPUS (Bank 7)PPUSend the pattern data for the icon bar to the PPU (this is a jump so we can call this routine using a branch instruction)
SendBitplaneToPPU (Bank 3)PPUSend a bitplane to the PPU immediately
SendBitplaneToPPU_b3 (Bank 7)PPUCall the SendBitplaneToPPU routine in ROM bank 3
SendBuffersToPPU (Part 1 of 3) (Bank 7)PPUSend the icon bar nametable and palette data to the PPU, if it has changed, before moving on to tile data in part 2
SendBuffersToPPU (Part 2 of 3) (Bank 7)PPUIf we are already sending tile data to the PPU, pick up where we left off, otherwise jump to part 3 to check for new data to send
SendBuffersToPPU (Part 3 of 3) (Bank 7)PPUIf we need to send tile nametable and pattern data to the PPU for either bitplane, start doing just that
sendDashboardToPPU (Common)Workspace variable A flag that controls whether we send the dashboard to the PPU during the main loop
SendDashImageToPPU (Bank 3)PPUUnpack the dashboard image and send it to patterns 69 to 255 in pattern table 0 in the PPU
SendDataNowToPPU (Bank 3)PPUSend the specified bitplane buffers to the PPU immediately, without trying to squeeze it into VBlanks
SendFontImageToPPU (Bank 3)PPUSend a font to the PPU as a colour 1 font on a colour 0 background (i.e. colour 1 on black)
sendingNameTile (Common)Workspace variable The number of the most recent tile that was sent to the PPU nametable by the NMI handler for bitplane 0 (or the number of the first tile to send if none have been sent), divided by 8
sendingPattern (Common)Workspace variable The number of the most recent pattern that was sent to the PPU pattern table by the NMI handler for bitplane 0 (or the number of the first pattern to send if none have been sent)
SendInventoryToPPU (Bank 7)PPUSend X batches of 16 bytes from SC(1 0) to the PPU, for sending the inventory icon bar image
SendNametableNow (Bank 7)PPUSend the nametable without checking the cycle count
SendNametableToPPU (Bank 7)PPUSend the tile nametable to the PPU if there are enough cycles left in the current VBlank
SendOtherBitplane (Bank 7)PPUCheck whether we should send another bitplane to the PPU
SendPaletteSprites (Bank 7)Drawing spritesSend the current palette and sprite data to the PPU
SendPalettesToPPU (Bank 7)PPUSend the palette data from XX3 to the PPU
SendPatternsToPPU (Part 1 of 6) (Bank 7)PPUCalculate how many patterns we need to send and jump to the most efficient routine for sending them
SendPatternsToPPU (Part 2 of 6) (Bank 7)PPUConfigure variables for sending data to the PPU one pattern at a time with checks
SendPatternsToPPU (Part 3 of 6) (Bank 7)PPUSend pattern data to the PPU for one pattern at a time, checking after each one to see if is the last one
SendPatternsToPPU (Part 4 of 6) (Bank 7)PPUConfigure variables for sending data to the PPU until we run out of cycles
SendPatternsToPPU (Part 5 of 6) (Bank 7)PPUSend pattern data to the PPU for two patterns at a time, until we run out of cycles (and without checking for the last pattern)
SendPatternsToPPU (Part 6 of 6) (Bank 7)PPUSave progress for use in the next VBlank and return from the subroutine
SendScreenToPPU (Bank 7)PPUUpdate the screen with the contents of the buffers
SendScreenToPPU+4 (Bank 7)PPURe-entry point following the call to SendPalettesToPPU at the start of the routine
SendSpaceViewToPPU (Bank 0)PPUSet a new space view, clear the screen, copy the nametable buffers and configure the PPU for the new view
SendTilesToPPU (Bank 7)PPUSet up the variables needed to send the tile nametable and pattern data to the PPU, and then send them
SendViewToPPU (Bank 3)PPUConfigure the PPU for the view type in QQ11
SendViewToPPU_b3 (Bank 7)PPUCall the SendViewToPPU routine in ROM bank 3
SESCP (Bank 0)FlightSpawn an escape pod from the current (parent) ship
SetAXTo15 (Bank 0)Utility routinesAn unused routine that sets A and X to 15
SetBank (Bank 7)Utility routinesPage a specified ROM bank into memory at $8000
SetBank0 (Bank 7)Utility routinesPage ROM bank 0 into memory at $8000
SetChosenLanguage (Bank 6)Start and endSet the language-related variables according to the language chosen on the Start screen
SetControllerPast (Bank 7)ControllersSet the controller history variables to the values from four VBlanks ago
SetCurrentSystem (Bank 0)UniverseSet the seeds for the selected system to the system that we last snapped the crosshairs to
SetDemoAutoPlay (Bank 5)Combat demoSet up the NMI handler to automatically play the demo using the controller key presses in the autoPlayKeys table
SetDemoAutoPlay_b5 (Bank 7)Combat demoCall the SetDemoAutoPlay routine in ROM bank 5
SetDrawingBitplane (Bank 7)Drawing the screenSet the drawing bitplane to a specified value
SetDrawingPlaneTo0 (Bank 7)Drawing the screenSet the drawing bitplane to 0
SetDrawPlaneFlags (Bank 7)Drawing the screenSet the drawing bitplane flags to the specified value, draw the box edges and set the next free tile number
SetEquipmentSprite (Bank 6)EquipmentSet up the sprites in the sprite buffer for a specific bit of equipment to show on our Cobra Mk III on the Equip Ship screen
SetIconBarButtons (Bank 3)Icon barSet the correct list of button numbers for the icon bar
SetIconBarButtonsS (Bank 3)Icon barSet the correct list of button numbers for the icon bar (this is a jump so we can call this routine using a branch instruction)
SetIconBarPointer (Bank 7)Icon barSet the icon bar pointer to a specific position
SetIconBarRow (Bank 3)Icon barSet the row on which the icon bar appears, which depends on the view type
SetKeyLogger (Bank 6)ControllersPopulate the key logger table with the controller button presses
SetKeyLogger_b6 (Bank 7)ControllersCall the SetKeyLogger routine in ROM bank 6
SetLanguage (Bank 6)Start and endSet the language-related variables for a specific language
SetLaserSprite (Bank 6)EquipmentSet up the sprites in the sprite buffer for a specific laser to show on our Cobra Mk III on the Equip Ship screen
SetLinePatterns (Bank 3)Drawing the screenCopy the patterns for horizontal line, vertical line and block images into the pattern buffers, depending on the view
SetLinePatterns_b3 (Bank 7)Drawing the screenCall the SetLinePatterns routine in ROM bank 3
SetNewViewType (Bank 0)Drawing the screenClear the screen, set the current view type and move the cursor to row 0
SetNonZeroBank (Bank 7)Utility routinesAn unused routine that pages a specified ROM bank into memory at $8000, but only if it is non-zero
SetPaletteColours (Bank 3)Drawing the screenSet the view's palette from the entries in the XX3 palette table
SetPaletteForView (Bank 7)Drawing the screenSend palette 0 for the current view to the PPU
SetPatternBuffer (Bank 7)Drawing the screenSet the high byte of the pattern buffer address variables
SetPPURegisters (Bank 7)PPUSet PPU_CTRL, PPU_ADDR and PPU_SCROLL for the current hidden bitplane
SetPPUTablesTo0 (Bank 7)PPUSet nametable 0 and pattern table 0 for drawing the icon bar
SetScreenForUpdate (Bank 7)Drawing spritesGet the screen ready for updating by hiding all sprites, after fading the screen to black if we are changing view
SetScreenHeight (Bank 0)Drawing the screenSet the screen height variables to the specified height
SetSelectedSeeds (Bank 0)UniverseSet the seeds for the selected system in QQ15 to the seeds in the safehouse
SetSelectedSystem (Bank 0)UniverseSet the selected system to the nearest system, if we don't already have a selected system
SetSelectionFlags (Bank 0)UniverseSet the selected system flags for the currently selected system and update the icon bar if required
SetSpaceViewInNMI (Bank 0)Drawing the screenChange the current space view and configure the NMI to send both bitplanes to the PPU during VBlank
SETUP_PPU_FOR_ICON_BAR (Common)PPUIf the PPU has started drawing the icon bar, configure the PPU to use nametable 0 and pattern table 0
SetupAfterLoad (Bank 0)Start and endConfigure the game following a commander file load
SetupAfterLoad_b0 (Bank 7)Start and endCall the SetupAfterLoad routine in ROM bank 0
SetupDemoShip (Bank 0)Combat demoSet up the ship workspace for a new ship in the combat demo
SetupDemoUniverse (Bank 7)Combat demoInitialise the local bubble of universe for the demo
SetupFullViewInNMI (Bank 7)Drawing the screenConfigure the PPU to send tiles for the full screen during VBlank
SetupIconBar (Bank 3)Icon barSet up the icons on the icon bar to show all available options
SetupIconBar_b3 (Bank 7)Icon barCall the SetupIconBar routine in ROM bank 3
SetupIconBarCharts (Bank 3)Icon barSet up the Charts icon bar
SetupIconBarDocked (Bank 3)Icon barSet up the Docked icon bar
SetupIconBarFlight (Bank 3)Icon barSet up the Flight icon bar
SetupIconBarPause (Bank 3)Icon barSet up the game options shown on the icon bar when the game is paused
SetupMMC1 (Bank 7)Utility routinesConfigure the MMC1 mapper and page ROM bank 0 into memory at $8000
SetupPPUForIconBar (Bank 7)PPUIf the PPU has started drawing the icon bar, configure the PPU to use nametable 0 and pattern table 0, while preserving A
setupPPUForIconBar (Common)Workspace variable Controls whether we force the nametable and pattern table to 0 when the PPU starts drawing the icon bar
SetupSpaceView (Bank 0)Drawing the screenSet up the NMI variables for the space view
SetupSprite0 (Bank 3)PPUSet the coordinates of sprite 0 so we can detect when the PPU starts to draw the icon bar
SetupViewInNMI (Bank 3)Drawing the screenSetup the view and configure the NMI to send both bitplanes to the PPU during VBlank
SetupViewInNMI_b3 (Bank 7)Drawing the screenCall the SetupViewInNMI routine in ROM bank 3
SetViewAttrs (Bank 3)Drawing the screenSet up attribute buffer 0 for the chosen view
SetViewAttrs_b3 (Bank 7)Drawing the screenCall the SetViewAttrs routine in ROM bank 3
SFRMIS (Bank 0)TacticsAdd an enemy missile to our local bubble of universe
SFS1 (Bank 0)UniverseSpawn a child ship from the current (parent) ship
SFS1-2 (Bank 0)UniverseAdd a missile to the local bubble that has AI enabled, is hostile, but has no E.C.M.
SFS2 (Bank 0)MovingMove a ship in space along one of the coordinate axes
SHD (Bank 0)FlightCharge a shield and drain some energy from the energy banks
SHIP_ADDER (Bank 1)Drawing shipsShip blueprint for an Adder
SHIP_ANACONDA (Bank 1)Drawing shipsShip blueprint for an Anaconda
SHIP_ASP_MK_2 (Bank 1)Drawing shipsShip blueprint for an Asp Mk II
SHIP_ASTEROID (Bank 1)Drawing shipsShip blueprint for an asteroid
SHIP_BOA (Bank 1)Drawing shipsShip blueprint for a Boa
SHIP_BOULDER (Bank 1)Drawing shipsShip blueprint for a boulder
SHIP_CANISTER (Bank 1)Drawing shipsShip blueprint for a cargo canister
SHIP_COBRA_MK_1 (Bank 1)Drawing shipsShip blueprint for a Cobra Mk I
SHIP_COBRA_MK_3 (Bank 1)Drawing shipsShip blueprint for a Cobra Mk III
SHIP_COBRA_MK_3_P (Bank 1)Drawing shipsShip blueprint for a Cobra Mk III (pirate)
SHIP_CONSTRICTOR (Bank 1)Drawing shipsShip blueprint for a Constrictor
SHIP_CORIOLIS (Bank 1)Drawing shipsShip blueprint for a Coriolis space station
SHIP_COUGAR (Bank 1)Drawing shipsShip blueprint for a Cougar
SHIP_DODO (Bank 1)Drawing shipsShip blueprint for a Dodecahedron ("Dodo") space station
SHIP_ESCAPE_POD (Bank 1)Drawing shipsShip blueprint for an escape pod
SHIP_FER_DE_LANCE (Bank 1)Drawing shipsShip blueprint for a Fer-de-Lance
SHIP_GECKO (Bank 1)Drawing shipsShip blueprint for a Gecko
SHIP_KRAIT (Bank 1)Drawing shipsShip blueprint for a Krait
SHIP_MAMBA (Bank 1)Drawing shipsShip blueprint for a Mamba
SHIP_MISSILE (Bank 1)Drawing shipsShip blueprint for a missile
SHIP_MORAY (Bank 1)Drawing shipsShip blueprint for a Moray
SHIP_PLATE (Bank 1)Drawing shipsShip blueprint for an alloy plate
SHIP_PYTHON (Bank 1)Drawing shipsShip blueprint for a Python
SHIP_PYTHON_P (Bank 1)Drawing shipsShip blueprint for a Python (pirate)
SHIP_ROCK_HERMIT (Bank 1)Drawing shipsShip blueprint for a rock hermit (asteroid)
SHIP_SHUTTLE (Bank 1)Drawing shipsShip blueprint for a Shuttle
SHIP_SIDEWINDER (Bank 1)Drawing shipsShip blueprint for a Sidewinder
SHIP_SPLINTER (Bank 1)Drawing shipsShip blueprint for a splinter
SHIP_THARGOID (Bank 1)Drawing shipsShip blueprint for a Thargoid mothership
SHIP_THARGON (Bank 1)Drawing shipsShip blueprint for a Thargon
SHIP_TRANSPORTER (Bank 1)Drawing shipsShip blueprint for a Transporter
SHIP_VIPER (Bank 1)Drawing shipsShip blueprint for a Viper
SHIP_WORM (Bank 1)Drawing shipsShip blueprint for a Worm
shipIsAggressive (Common)Workspace variable A flag to record just how aggressive the current ship is in the TACTICS routine
ShowIconBar (Bank 3)Icon barShow a specified icon bar on-screen
ShowIconBar_b3 (Bank 7)Icon barCall the ShowIconBar routine in ROM bank 3
showIconBarPointer (Common)Workspace variable Controls whether to show the icon bar pointer
ShowScrollText (Bank 6)Combat demoShow a scroll text and start the combat demo
ShowScrollText_b6 (Bank 7)Combat demoCall the ShowScrollText routine in ROM bank 6
ShowStartScreen (Bank 0)Start and endShow the start screen and start the game
showUserInterface (Common)Workspace variable Bit 7 set means display the user interface (so we only clear it for the game over screen)
SHPPT (Bank 1)Drawing shipsDraw a distant ship as a point rather than a full wireframe
SIGHT (Bank 3)FlightDraw the laser crosshairs
SIGHT_b3 (Bank 7)FlightCall the SIGHT routine in ROM bank 3
skipBarPatternsPPU (Common)Workspace variable A flag to control whether to send the icon bar's patterns to the PPU, after sending the nametable entries (this only applies if barPatternCounter = 0)
smallLogoImage (Bank 3)Save and loadPacked image data for the small Elite logo shown on the Save and Load screen
smallLogoTile (Bank 4)Save and loadPattern numbers in the smallLogoImage table for the sprites that make up the small Elite logo on the Save and Load screen
SNE (Bank 7)Maths (Geometry)Sine/cosine table
SOLAR (Bank 0)UniverseSet up various aspects of arriving in a new system
SOS1 (Bank 0)UniverseUpdate the missile indicators, set up the planet data block
soundAddr (Common)Workspace variable Temporary storage, used in a number of places in the sound routines to hold an address
soundByteNOISE (Common)Workspace variable The 14 sound bytes for the sound effect being made on channel NOISE
soundByteSQ1 (Common)Workspace variable The 14 sound bytes for the sound effect being made on channel SQ1
soundByteSQ2 (Common)Workspace variable The 14 sound bytes for the sound effect being made on channel SQ2
soundChannel (Bank 7)SoundThe sound channels used by each sound effect
soundData (Bank 6)SoundSound data for the sound effects
soundHiNOISE (Common)Workspace variable The value that we are going to send to the APU via NOISE_HI for the current sound effect
soundHiSQ1 (Common)Workspace variable The value that we are going to send to the APU via SQ1_HI for the current sound effect
soundHiSQ2 (Common)Workspace variable The value that we are going to send to the APU via SQ2_HI for the current sound effect
soundLoNOISE (Common)Workspace variable The value that we are going to send to the APU via NOISE_LO for the current sound effect
soundLoSQ1 (Common)Workspace variable The value that we are going to send to the APU via SQ1_LO for the current sound effect
soundLoSQ2 (Common)Workspace variable The value that we are going to send to the APU via SQ2_LO for the current sound effect
soundPitchEnvNOISE (Common)Workspace variable Controls how often we apply the pitch envelope to the sound effect on channel NOISE
soundPitchEnvSQ1 (Common)Workspace variable Controls how often we apply the pitch envelope to the sound effect on channel SQ1
soundPitchEnvSQ2 (Common)Workspace variable Controls how often we apply the pitch envelope to the sound effect on channel SQ2
soundPitCountNOISE (Common)Workspace variable Controls how often we send pitch data to the APU for the sound effect on channel NOISE
soundPitCountSQ1 (Common)Workspace variable Controls how often we send pitch data to the APU for the sound effect on channel SQ1
soundPitCountSQ2 (Common)Workspace variable Controls how often we send pitch data to the APU for the sound effect on channel SQ2
soundPriority (Bank 7)SoundThe default priority for each sound effect
soundVibrato (Common)Workspace variable The four-byte seeds for adding randomised vibrato to the current sound effect
soundVolCountNOISE (Common)Workspace variable Controls how often we apply the volume envelope to the sound effect on channel NOISE
soundVolCountSQ1 (Common)Workspace variable Controls how often we apply the volume envelope to the sound effect on channel SQ1
soundVolCountSQ2 (Common)Workspace variable Controls how often we apply the volume envelope to the sound effect on channel SQ2
soundVolIndexNOISE (Common)Workspace variable The index into the volume envelope data of the next volume byte to apply to the sound effect on channel NOISE
soundVolIndexSQ1 (Common)Workspace variable The index into the volume envelope data of the next volume byte to apply to the sound effect on channel SQ1
soundVolIndexSQ2 (Common)Workspace variable The index into the volume envelope data of the next volume byte to apply to the sound effect on channel SQ2
soundVolume (Bank 6)SoundVolume envelope data for the sound effects
soundVolumeNOISE (Common)Workspace variable The address of the volume envelope data for the sound effect currently being made on channel NOISE
soundVolumeSQ1 (Common)Workspace variable The address of the volume envelope data for the sound effect currently being made on channel SQ1
soundVolumeSQ2 (Common)Workspace variable The address of the volume envelope data for the sound effect currently being made on channel SQ2
SP1 (Bank 0)DashboardDraw the space station on the compass
SP2 (Bank 0)DashboardDraw a dot on the compass, given the planet/station vector
spasto (Common)Workspace variable Contains the address of the ship blueprint of the space station (which can be a Coriolis or Dodo)
SpawnSpaceStation (Bank 0)UniverseAdd a space station to the local bubble of universe if we are close enough to the station's orbit
spc (Bank 0)TextPrint a text token followed by a space
SPIN (Bank 0)UniverseRandomly spawn cargo from a destroyed ship
SPIN2 (Bank 0)UniverseRemove any randomness: spawn cargo of a specific type (given in X), and always spawn the number given in A
Sprite buffer (Common)WorkspacesConfiguration data for sprites 0 to 63, which gets copied to the PPU to update the screen
SPS1 (Bank 0)Maths (Geometry)Calculate the vector to the planet and store it in XX15
SPS1+1 (Bank 0)Maths (Geometry)A BRK instruction
SPS2 (Bank 0)Maths (Arithmetic)Calculate X = A / 16
SPS3 (Bank 0)Maths (Geometry)Copy a space coordinate from the K% block into K3
SPS4 (Bank 0)Maths (Geometry)Calculate the vector to the space station
sq1Hi (Common)Workspace variable The value that we are going to send to the APU via SQ1_HI for the current tune
sq1Lo (Common)Workspace variable The value that we are going to send to the APU via SQ1_LO for the current tune
sq1LoCopy (Common)Workspace variable A copy of the value that we are going to send to the APU via SQ1_LO for the current tune
sq1Sweep (Common)Workspace variable The value that we are going to send to the APU via SQ1_SWEEP for the current tune
sq1Volume (Common)Workspace variable The value that we are going to send to the APU via SQ1_VOL for the current tune
sq2Hi (Common)Workspace variable The value that we are going to send to the APU via SQ2_HI for the current tune
sq2Lo (Common)Workspace variable The value that we are going to send to the APU via SQ2_LO for the current tune
sq2LoCopy (Common)Workspace variable A copy of the value that we are going to send to the APU via SQ2_LO for the current tune
sq2Sweep (Common)Workspace variable The value that we are going to send to the APU via SQ2_SWEEP for the current tune
sq2Volume (Common)Workspace variable The value that we are going to send to the APU via SQ2_VOL for the current tune
SQUA (Bank 7)Maths (Arithmetic)Clear bit 7 of A and calculate (A P) = A * A
SQUA2 (Bank 7)Maths (Arithmetic)Calculate (A P) = A * A
SSPR (Common)Workspace variable "Space station present" flag
STARS (Bank 1)StardustThe main routine for processing the stardust
STARS1 (Bank 1)StardustProcess the stardust for the front view
STARS2 (Bank 1)StardustProcess the stardust for the left or right view
STARS6 (Bank 1)StardustProcess the stardust for the rear view
STARS_b1 (Bank 7)StardustCall the STARS routine in ROM bank 1
StartEffect (Bank 6)SoundStart making a sound effect on the specified channel
StartEffect_b6 (Bank 7)SoundCall the StartEffect routine in ROM bank 6
StartEffect_b7 (Bank 7)SoundCall the StartEffect routine
StartEffectOnNOISE (Bank 6)SoundMake a sound effect on the NOISE channel
StartEffectOnNOISES (Bank 6)SoundA jump table entry at the start of bank 6 for the StartEffectOnNOISE routine
StartEffectOnSQ1 (Bank 6)SoundMake a sound effect on the SQ1 channel
StartEffectOnSQ1S (Bank 6)SoundA jump table entry at the start of bank 6 for the StartEffectOnSQ1 routine
StartEffectOnSQ2 (Bank 6)SoundMake a sound effect on the SQ2 channel
StartEffectOnSQ2S (Bank 6)SoundA jump table entry at the start of bank 6 for the StartEffectOnSQ2 routine
StartGame (Bank 0)Start and endReset the stack and game variables, and start the game by going to the docking bay
StartGame_b0 (Bank 7)Start and endSwitch to ROM bank 0 and call the StartGame routine
startPauseNOISE (Common)Workspace variable Pause for this many iterations before starting to process each batch of note data on channel NOISE
startPauseSQ1 (Common)Workspace variable Pause for this many iterations before starting to process each batch of note data on channel SQ1
startPauseSQ2 (Common)Workspace variable Pause for this many iterations before starting to process each batch of note data on channel SQ2
startPauseTRI (Common)Workspace variable Pause for this many iterations before starting to process each batch of note data on channel TRI
startupDebug (Common)Workspace variable This variable is set to 0 in the game's entry routine at S%, but it is never read, so maybe this is part of some debug code that was left behind?
STATUS (Bank 0)StatusShow the Status Mode screen
statusCondition (Common)Workspace variable Used to store the ship's current status condition (i.e. docked, green, yellow or red)
StopSounds (Bank 6)SoundStop all sounds (music and sound effects)
StopSounds_b6 (Bank 7)SoundCall the StopSounds routine in ROM bank 6
StopSoundsS (Bank 6)SoundA jump table entry at the start of bank 6 for the StopSounds routine
storeA (Common)Workspace variable Temporary storage for saving the value of the A register, used in the bank-switching routines in bank 7
StoreMessage (Bank 0)TextCopy a message from the justified text buffer at BUF into the message buffer
STP (Common)Workspace variable The step size for drawing circles
SUBTRACT_CYCLES (Common)Drawing the screenSubtract a specified number from the cycle count
SUN (Part 1 of 2) (Bank 1)Drawing sunsDraw the sun: Set up all the variables needed to draw the sun
SUN (Part 2 of 2) (Bank 1)Drawing sunsDraw the sun: Starting from the bottom of the sun, draw the new sun line by line
SUN_b1 (Bank 7)Drawing sunsCall the SUN routine in ROM bank 1
sunWidth0 (Common)Workspace variable The half-width of the sun on pixel row 0 in the tile row that is currently being drawn
sunWidth1 (Common)Workspace variable The half-width of the sun on pixel row 1 in the tile row that is currently being drawn
sunWidth2 (Common)Workspace variable The half-width of the sun on pixel row 2 in the tile row that is currently being drawn
sunWidth3 (Common)Workspace variable The half-width of the sun on pixel row 3 in the tile row that is currently being drawn
sunWidth4 (Common)Workspace variable The half-width of the sun on pixel row 4 in the tile row that is currently being drawn
sunWidth5 (Common)Workspace variable The half-width of the sun on pixel row 5 in the tile row that is currently being drawn
sunWidth6 (Common)Workspace variable The half-width of the sun on pixel row 6 in the tile row that is currently being drawn
sunWidth7 (Common)Workspace variable The half-width of the sun on pixel row 7 in the tile row that is currently being drawn
SVC (Common)Workspace variable The save count
SVE (Bank 6)Save and loadDisplay the Save and Load screen and process saving and loading of commander files
SVE_b6 (Bank 7)Save and loadCall the SVE routine in ROM bank 6
SWAP (Common)Workspace variable Temporary storage, used to store a flag that records whether or not we had to swap a line's start and end coordinates around when clipping the line in routine LL145 (the flag is used in places like BLINE to swap them back)
SX (Common)Workspace variable This is where we store the x_hi coordinates for all the stardust particles
SXL (Common)Workspace variable This is where we store the x_lo coordinates for all the stardust particles
SY (Common)Workspace variable This is where we store the y_hi coordinates for all the stardust particles
SYL (Common)Workspace variable This is where we store the y_lo coordinates for all the stardust particles
systemCount (Bank 5)UniverseThe number of system images in the systemOffset table
systemImage0 (Bank 5)UniversePacked image data for system image 0
systemImage1 (Bank 5)UniversePacked image data for system image 1
systemImage10 (Bank 5)UniversePacked image data for system image 10
systemImage11 (Bank 5)UniversePacked image data for system image 11
systemImage12 (Bank 5)UniversePacked image data for system image 12
systemImage13 (Bank 5)UniversePacked image data for system image 13
systemImage14 (Bank 5)UniversePacked image data for system image 14
systemImage2 (Bank 5)UniversePacked image data for system image 2
systemImage3 (Bank 5)UniversePacked image data for system image 3
systemImage4 (Bank 5)UniversePacked image data for system image 4
systemImage5 (Bank 5)UniversePacked image data for system image 5
systemImage6 (Bank 5)UniversePacked image data for system image 6
systemImage7 (Bank 5)UniversePacked image data for system image 7
systemImage8 (Bank 5)UniversePacked image data for system image 8
systemImage9 (Bank 5)UniversePacked image data for system image 9
systemNumber (Common)Workspace variable The current system number, as calculated in TT111 when finding the nearest system in the galaxy
systemOffset (Bank 5)UniverseOffset to the data for each of the 15 system images
systemPalettes (Bank 3)UniversePalettes for the system images
systemsOnChart (Common)Workspace variable A counter for the number of systems drawn on the Short-range Chart, so it gets limited to 24 systems
SZ (Common)Workspace variable This is where we store the z_hi coordinates for all the stardust particles
SZL (Common)Workspace variable This is where we store the z_lo coordinates for all the stardust particles
T (Common)Workspace variable Temporary storage, used in a number of places
T1 (Common)Workspace variable Temporary storage, used in a number of places
TA151 (Bank 0)TacticsMake the ship head towards the planet
TA2 (Bank 0)Maths (Geometry)Calculate the length of the vector in XX15 (ignoring the low coordinates), returning it in Q
TACTICS (Part 1 of 7) (Bank 0)TacticsApply tactics: Process missiles, both enemy missiles and our own
TACTICS (Part 2 of 7) (Bank 0)TacticsApply tactics: Escape pod, station, lone Thargon, safe-zone pirate
TACTICS (Part 3 of 7) (Bank 0)TacticsApply tactics: Calculate dot product to determine ship's aim
TACTICS (Part 4 of 7) (Bank 0)TacticsApply tactics: Check energy levels, maybe launch escape pod if low
TACTICS (Part 5 of 7) (Bank 0)TacticsApply tactics: Consider whether to launch a missile at us
TACTICS (Part 6 of 7) (Bank 0)TacticsApply tactics: Consider firing a laser at us, if aim is true
TACTICS (Part 7 of 7) (Bank 0)TacticsApply tactics: Set pitch, roll, and acceleration
tal (Bank 0)UniversePrint the current galaxy number
TALLY (Common)Workspace variable Our combat rank
TALLYL (Common)Workspace variable Combat rank fraction
tals (Bank 0)TextPrint the current galaxy number
TAS1 (Bank 0)Maths (Arithmetic)Calculate K3 = (x_sign x_hi x_lo) - V(1 0)
TAS2 (Bank 0)Maths (Geometry)Normalise the three-coordinate vector in K3
TAS3 (Bank 7)Maths (Geometry)Calculate the dot product of XX15 and an orientation vector
TAS4 (Bank 0)Maths (Geometry)Calculate the dot product of XX15 and one of the space station's orientation vectors
TAS6 (Bank 0)Maths (Geometry)Negate the vector in XX15 so it points in the opposite direction
TBRIEF (Bank 0)MissionsStart mission 3
tek (Common)Workspace variable The current system's tech level (0-14)
TENS (Bank 0)TextA constant used when printing large numbers in BPRNT
TGT (Common)Workspace variable Temporary storage, typically used as a target value for counters when drawing explosion clouds and partial circles
THERE (Bank 0)MissionsCheck whether we are in the Constrictor's system in mission 1
TIDY (Bank 1)Maths (Geometry)Orthonormalise the orientation vectors for a ship
TIDY_b1 (Bank 7)Maths (Geometry)Call the TIDY routine in ROM bank 1
TIS1 (Bank 7)Maths (Arithmetic)Calculate (A ?) = (-X * A + (S R)) / 96
TIS2 (Bank 7)Maths (Arithmetic)Calculate A = A / Q
TIS3 (Bank 1)Maths (Arithmetic)Calculate -(nosev_1 * roofv_1 + nosev_2 * roofv_2) / nosev_3
TITLE (Bank 0)Start and endDisplay a title screen with a rotating ship and prompt
titleShip (Common)Workspace variable Used to store the current ship number in the title screen
titleShipDist (Bank 7)Start and endThe distances at which to show the rotating title screen ships
titleShipType (Bank 7)Start and endThe types of ship to show rotating on the title screen
TKN1 (Bank 2)TextThe first extended token table for recursive tokens 0-255 (DETOK)
TKN1_DE (Bank 2)TextThe first extended token table for recursive tokens 0-255 (DETOK) (German)
TKN1_FR (Bank 2)TextThe first extended token table for recursive tokens 0-255 (DETOK) (French)
TKN1Hi (Common)Workspace variable Gets set to the high byte of the address of the text token table used by the DETOK routine (TKN1)
TKN1Lo (Common)Workspace variable Gets set to the low byte of the address of the text token table used by the DETOK routine (TKN1)
TKN2 (Bank 2)TextThe extended two-letter token lookup table
tnpr (Bank 0)MarketWork out if we have space for a specific amount of cargo
tnpr1 (Bank 0)MarketWork out if we have space for one tonne of cargo
tokensHi (Bank 6)TextHigh byte of the text token table for each language
tokensLo (Bank 6)TextLow byte of the text token table for each language
TOKN (Common)TextMacro definition for standard tokens in the extended token table
TP (Common)Workspace variable The current mission status
TRIBBLE (Common)Workspace variable The number of Trumbles in the cargo hold
triHi (Common)Workspace variable The value that we are going to send to the APU via TRI_HI for the current tune
triLo (Common)Workspace variable The value that we are going to send to the APU via TRI_LO for the current tune
triLoCopy (Common)Workspace variable A copy of the value that we are going to send to the APU via TRI_LO for the current tune
trumbleSounds (Bank 0)SoundThe range of sounds that the Trumbles make in the hold
TT100 (Bank 0)Main loopThe entry point for the start of the main game loop, which calls the main flight loop and the moves into the spawning routine
TT102 (Bank 0)Icon barProcess icon bar controller choices
TT103 (Bank 0)ChartsDraw a small set of crosshairs on a chart
TT105 (Bank 0)ChartsDraw crosshairs on the Short-range Chart, with clipping
TT11 (Bank 0)TextPrint a 16-bit number, left-padded to n digits, and optional point
TT110 (Bank 0)FlightLaunch from a station or show the front space view
TT111 (Bank 0)UniverseSet the current system to the nearest system to a point
TT111-1 (Bank 0)UniverseContains an RTS
TT113 (Bank 0)Maths (Arithmetic)Contains an RTS
TT114 (Bank 0)ChartsDisplay either the Long-range or Short-range Chart
TT123 (Bank 0)ChartsMove galactic coordinates by a signed delta
TT128 (Bank 0)Drawing circlesDraw a circle on a chart
TT14 (Bank 0)Drawing circlesDraw a circle with crosshairs on a chart
TT146 (Bank 0)UniversePrint the distance to the selected system in light years
TT147 (Bank 0)FlightPrint an error when a system is out of hyperspace range
TT15 (Bank 0)Drawing linesDraw a set of crosshairs
TT151 (Bank 0)MarketPrint the name, price and availability of a market item
TT152 (Bank 0)MarketPrint the unit ("t", "kg" or "g") for a market item
TT16 (Bank 0)ChartsMove the crosshairs on a chart
TT160 (Bank 0)MarketPrint "t" (for tonne) and a space
TT161 (Bank 0)MarketPrint "kg" (for kilograms)
TT162 (Bank 0)TextPrint a space
TT162+2 (Bank 0)TextJump to TT27 to print the text token in A
TT163 (Bank 0)MarketPrint the headers for the table of market prices
TT167 (Bank 0)MarketShow the Market Price screen
TT16a (Bank 0)MarketPrint "g" (for grams)
TT17 (Bank 0)ControllersScan the key logger for the directional pad buttons
TT18 (Bank 0)FlightTry to initiate a jump into hyperspace
TT180 (Bank 0)ChartsContains an RTS
TT20 (Bank 0)UniverseTwist the selected system's seeds four times
TT210 (Bank 0)MarketShow a list of current cargo in our hold, optionally to sell
TT213 (Bank 0)MarketShow the Inventory screen
TT22 (Bank 0)ChartsShow the Long-range Chart
TT23 (Bank 0)ChartsShow the Short-range Chart
TT24 (Bank 6)UniverseCalculate system data from the system seeds
TT24_b6 (Bank 7)UniverseCall the TT24 routine in ROM bank 6
TT25 (Bank 0)UniverseShow the Data on System screen
TT26 (Bank 2)TextPrint a character at the text cursor, with support for verified text in extended tokens
TT27 (Bank 2)TextPrint a text token
TT27_b2 (Bank 7)TextCall the TT27 routine in ROM bank 2
TT41 (Bank 2)TextPrint a letter according to Sentence Case
TT42 (Bank 2)TextPrint a letter in lower case
TT43 (Bank 2)TextPrint a two-letter token or recursive token 0-95
TT44 (Bank 2)TextJumps to TT26 to print the character in A (used to enable us to use a branch instruction to jump to TT26)
TT45 (Bank 2)TextPrint a letter in lower case
TT48 (Bank 2)TextContains an RTS
TT54 (Bank 0)UniverseTwist the selected system's seeds
TT60 (Bank 0)TextPrint a text token and a paragraph break
TT66 (Bank 0)Drawing the screenClear the screen and set the new view type
TT66_b0 (Bank 7)Drawing the screenCall the TT66 routine in ROM bank 0
TT67 (Bank 0)TextPrint a newline
TT68 (Bank 0)TextPrint a text token followed by a colon
TT69 (Bank 0)TextSet Sentence Case and print a newline
TT70 (Bank 0)UniverseDisplay "MAINLY " and jump to TT72
TT72 (Bank 0)UniverseUsed by TT70 to re-enter the routine after displaying "MAINLY" for the economy type
TT73 (Bank 0)TextPrint a colon
TT81 (Bank 0)UniverseSet the selected system's seeds to those of system 0
TTX69 (Bank 0)TextPrint a paragraph break
tuneData (Bank 6)SoundData for the tunes played in the game
tuneProgress (Common)Workspace variable A variable for keeping track of progress while playing the current tune, so we send data to the APU at the correct time over multiple iterations of the MakeMusic routine, according to the tune speed in tuneSpeed
tuneSpeed (Common)Workspace variable The speed of the current tune, which can vary as the tune plays
tuneSpeedCopy (Common)Workspace variable The starting speed of the current tune, as stored in the tune's data
tuningAll (Common)Workspace variable The tuning value for all channels
tuningSQ1 (Common)Workspace variable The tuning value for the SQ1 channel
tuningSQ2 (Common)Workspace variable The tuning value for the SQ2 channel
tuningTRI (Common)Workspace variable The tuning value for the TRI channel
TWFL (Bank 7)Drawing linesReady-made character rows for the left end of a horizontal line in the space view
TWFR (Bank 7)Drawing linesReady-made character rows for the right end of a horizontal line in the space view
TWOK (Common)TextMacro definition for two-letter tokens in the token table
TWOS (Bank 7)Drawing pixelsReady-made single-pixel character row bytes for the space view
TWOS2 (Bank 7)Drawing pixelsReady-made double-pixel character row bytes for the space view
TYPE (Common)Workspace variable The current ship type
U (Common)Workspace variable Temporary storage, used in a number of places
U% (Bank 0)ControllersClear the key logger
UNIV (Bank 7)UniverseTable of pointers to the local universe's ship data blocks
UnpackToPPU (Bank 7)Utility routinesUnpack compressed image data and send it to the PPU
UnpackToPPU+2 (Bank 7)Utility routinesUnpack data from offset Y onwards
UnpackToRAM (Bank 7)Utility routinesUnpack compressed image data to RAM
Unused copy of XX21 (Bank 1)Drawing shipsRemnants of an unused copy of the XX21 ship blueprints lookup table
unusedVariable (Common)Workspace variable This variable is zeroed in RES2 but is never read
UpdateEquipment (Bank 0)EquipmentHighlight the newly chosen item of equipment, update the Cobra Mk III, redraw the screen and rejoin the main EQSHP routine
UpdateHangarView (Bank 7)PPUUpdate the hangar view on-screen by sending the data to the PPU, either immediately or during VBlank
UpdateIconBar (Bank 3)Icon barUpdate the icon bar
UpdateIconBar_b3 (Bank 7)Icon barCall the UpdateIconBar routine in ROM bank 3
UpdateJoystick (Bank 7)ControllersUpdate the values of JSTX and JSTY with the values from the controller
UpdateNMITimer (Bank 7)Utility routinesUpdate the NMI timer, which we can use to keep track of time for places like the combat demo
updatePaletteInNMI (Common)Workspace variable A flag that controls whether to send the palette data from XX3 to the PPU during NMI:
UpdateSaveCount (Bank 7)Save and loadUpdate the save counter for the current commander
UpdateSaveScreen (Bank 6)Save and loadUpdate the Save and Load screen
UpdateScreen (Bank 7)PPUUpdate the screen by sending data to the PPU, either immediately or during VBlank, depending on whether the screen is visible
UpdateVibratoSeeds (Bank 6)SoundUpdate the sound seeds that are used to randomise the vibrato effect
UpdateView (Bank 0)Drawing the screenUpdate the view
UpdateView_b0 (Bank 7)Drawing the screenCall the UpdateView routine in ROM bank 0
UpdateViewWithFade (Bank 7)Drawing the screenFade the screen to black, if required, hide all sprites and update the view
V (Common)Workspace variable Temporary storage, typically used for storing an address pointer
var (Bank 0)MarketCalculate QQ19+3 = economy * |economic_factor|
VCSU1 (Bank 0)Maths (Arithmetic)Calculate vector K3(8 0) = [x y z] - coordinates of the sun or space station
VCSUB (Bank 0)Maths (Arithmetic)Calculate vector K3(8 0) = [x y z] - coordinates in (A V)
Vectors (Bank 0)Utility routinesVectors and padding at the end of the ROM bank
Vectors (Bank 1)Utility routinesVectors and padding at the end of the ROM bank
Vectors (Bank 2)Utility routinesVectors and padding at the end of the ROM bank
Vectors (Bank 3)Utility routinesVectors and padding at the end of the ROM bank
Vectors (Bank 4)Utility routinesVectors and padding at the end of the ROM bank
Vectors (Bank 5)Utility routinesVectors and padding at the end of the ROM bank
Vectors (Bank 6)Utility routinesVectors and padding at the end of the ROM bank
Vectors_b7 (Bank 7)Utility routinesVectors at the end of ROM bank 7
Version number (Bank 0)TextThe game's version number
Version number (Bank 1)TextThe game's version number
Version number (Bank 2)TextThe game's version number
Version number (Bank 3)TextThe game's version number
Version number (Bank 4)TextThe game's version number
Version number (Bank 5)TextThe game's version number
Version number (Bank 6)TextThe game's version number
VERTEX (Common)Drawing shipsMacro definition for adding vertices to ship blueprints
VIEW (Common)Workspace variable The number of the current space view
viewAttrCount (Bank 3)Drawing the screenThe number of sets of view attributes in the viewAttrOffset table
viewAttributes0 (Bank 3)Drawing the screenPacked view attribute data for attribute set 0
viewAttributes1 (Bank 3)Drawing the screenPacked view attribute data for attribute set 1
viewAttributes10 (Bank 3)Drawing the screenPacked view attribute data for attribute set 10
viewAttributes11 (Bank 3)Drawing the screenPacked view attribute data for attribute set 11
viewAttributes12 (Bank 3)Drawing the screenPacked view attribute data for attribute set 12
viewAttributes13 (Bank 3)Drawing the screenPacked view attribute data for attribute set 13
viewAttributes14 (Bank 3)Drawing the screenPacked view attribute data for attribute set 14
viewAttributes15 (Bank 3)Drawing the screenPacked view attribute data for attribute set 15
viewAttributes16 (Bank 3)Drawing the screenPacked view attribute data for attribute set 16
viewAttributes17 (Bank 3)Drawing the screenPacked view attribute data for attribute set 17
viewAttributes18 (Bank 3)Drawing the screenPacked view attribute data for attribute set 18
viewAttributes19 (Bank 3)Drawing the screenPacked view attribute data for attribute set 19
viewAttributes2 (Bank 3)Drawing the screenPacked view attribute data for attribute set 2
viewAttributes20 (Bank 3)Drawing the screenPacked view attribute data for attribute set 20
viewAttributes21 (Bank 3)Drawing the screenPacked view attribute data for attribute set 21
viewAttributes22 (Bank 3)Drawing the screenPacked view attribute data for attribute set 22
viewAttributes23 (Bank 3)Drawing the screenPacked view attribute data for attribute set 23
viewAttributes3 (Bank 3)Drawing the screenPacked view attribute data for attribute set 3
viewAttributes4 (Bank 3)Drawing the screenPacked view attribute data for attribute set 4
viewAttributes5 (Bank 3)Drawing the screenPacked view attribute data for attribute set 5
viewAttributes6 (Bank 3)Drawing the screenPacked view attribute data for attribute set 6
viewAttributes7 (Bank 3)Drawing the screenPacked view attribute data for attribute set 7
viewAttributes8 (Bank 3)Drawing the screenPacked view attribute data for attribute set 8
viewAttributes9 (Bank 3)Drawing the screenPacked view attribute data for attribute set 9
viewAttributes_DE (Bank 3)Drawing the screenThe view attributes to use for each view type in German
viewAttributes_EN (Bank 3)Drawing the screenThe view attributes to use for each view type in English
viewAttributes_FR (Bank 3)Drawing the screenThe view attributes to use for each view type in French
viewAttributesHi (Bank 3)Drawing the screenThe high byte of the view attributes lookup table for each language
viewAttributesLo (Bank 3)Drawing the screenThe low byte of the view attributes lookup table for each language
viewAttrOffset (Bank 3)Drawing the screenOffset to the data for each of the 24 sets of view attributes
viewPalettes (Bank 3)Drawing the screenThe palettes to use for the different views
visibleColour (Common)Workspace variable Contains the colour to use for pixels that are visible in palette 0, e.g. $2C for cyan
volumeCounterNOISE (Common)Workspace variable A counter for keeping track of repeated bytes from the volume envelope on channel NOISE
volumeCounterSQ1 (Common)Workspace variable A counter for keeping track of repeated bytes from the volume envelope on channel SQ1
volumeCounterSQ2 (Common)Workspace variable A counter for keeping track of repeated bytes from the volume envelope on channel SQ2
volumeCounterTRI (Common)Workspace variable A counter for keeping track of repeated bytes from the volume envelope on channel TRI
volumeEnvelope (Bank 6)SoundVolume envelope data for the game music
volumeEnvelopeNOISE (Common)Workspace variable The number of the volume envelope to be applied to the current tune on channel NOISE
volumeEnvelopeSQ1 (Common)Workspace variable The number of the volume envelope to be applied to the current tune on channel SQ1
volumeEnvelopeSQ2 (Common)Workspace variable The number of the volume envelope to be applied to the current tune on channel SQ2
volumeEnvelopeTRI (Common)Workspace variable The number of the volume envelope to be applied to the current tune on channel TRI
volumeIndexNOISE (Common)Workspace variable The index into the volume envelope data of the next volume byte to apply to channel NOISE
volumeIndexSQ1 (Common)Workspace variable The index into the volume envelope data of the next volume byte to apply to channel SQ1
volumeIndexSQ2 (Common)Workspace variable The index into the volume envelope data of the next volume byte to apply to channel SQ2
volumeRepeatNOISE (Common)Workspace variable The number of repeats to be applied to each byte in the volume envelope on channel NOISE
volumeRepeatSQ1 (Common)Workspace variable The number of repeats to be applied to each byte in the volume envelope on channel SQ1
volumeRepeatSQ2 (Common)Workspace variable The number of repeats to be applied to each byte in the volume envelope on channel SQ2
VOWEL (Bank 2)TextTest whether a character is a vowel
WaitFor2NMIs (Bank 7)Utility routinesWait until two NMI interrupts have passed (i.e. the next two VBlanks)
WaitFor3xVBlank (Bank 7)Utility routinesWait for three VBlanks to pass
WaitForIconBarPPU (Bank 7)PPUWait until the PPU starts drawing the icon bar
WaitForNextNMI (Bank 7)Utility routinesAn unused routine that waits until the NMI counter increments (i.e. the next VBlank)
WaitForNMI (Bank 7)Utility routinesWait until the next NMI interrupt has passed (i.e. the next VBlank)
WaitForNoDirection (Bank 6)ControllersWait until the left and right buttons on controller 1 have been released and remain released for at least four VBlanks
WaitForPPUToFinish (Bank 7)PPUWait until the NMI handler has finished updating both bitplanes, so the screen is no longer refreshing
WaitForVBlank (Bank 7)Utility routinesWait for the next VBlank to pass
WARP (Bank 0)FlightProcess the fast-forward button to end the demo, dock instantly or perform an in-system jump
widget (Common)Workspace variable Temporary storage, used to store the original argument in A in the logarithmic FMLTU and LL28 routines
WP (Common)WorkspacesShip slots, variables
WPSHPS (Bank 0)DashboardSet all ships to be hidden from the screen
wW (Bank 0)FlightStart a hyperspace countdown
wW2 (Bank 0)FlightStart the hyperspace countdown, starting the countdown from the value in A
X1 (Common)Workspace variable Temporary storage, typically used for x-coordinates in line-drawing routines
X1TB (Common)Workspace variable The x-coordinates of the start points for character lines in the scroll text
X2 (Common)Workspace variable Temporary storage, typically used for x-coordinates in line-drawing routines
X2TB (Common)Workspace variable The x-coordinates of the end points for character lines in the scroll text
XC (Common)Workspace variable The x-coordinate of the text cursor (i.e. the text column), which can be from 0 to 32
xCash (Bank 0)MarketThe text column for our cash levels on the Market Price page
xDataOnSystem (Bank 0)UniverseThe text column for the Data on System title for each language
xEquipShip (Bank 0)EquipmentThe text column for the Equip Ship title for each language
xIconBarPointer (Common)Workspace variable The x-coordinate of the icon bar pointer
xLanguage (Bank 6)Start and endThe text column for the language buttons on the Start screen
xLaserView (Bank 0)EquipmentThe text column of the right edge of the laser-buying popup, so the popup gets filled with spaces and covers what's underneath it
XP (Common)Workspace variable The x-coordinate of the current character as we construct the lines for the Star Wars scroll text
xPointerDelta (Common)Workspace variable The direction in which the icon bar pointer is moving, expressed as a delta to add to the x-coordinate of the pointer sprites
XSAV (Common)Workspace variable Temporary storage for saving the value of the X register, used in a number of places
XSAV2 (Common)Workspace variable Temporary storage, used for storing the value of the X register in the CHPR routine
xSaveHeader (Bank 6)Save and loadThe text column for the Save and Load screen headers for each language
xShortRange (Bank 0)ChartsThe text column for the Short-range Chart title for each language
xSpaceView (Bank 7)FlightThe text column for the space view name for each language
xSprite0 (Common)Workspace variable Screen x-coordinate for sprite 0
xSprite1 (Common)Workspace variable Screen x-coordinate for sprite 1
xSprite10 (Common)Workspace variable Screen x-coordinate for sprite 10
xSprite11 (Common)Workspace variable Screen x-coordinate for sprite 11
xSprite12 (Common)Workspace variable Screen x-coordinate for sprite 12
xSprite13 (Common)Workspace variable Screen x-coordinate for sprite 13
xSprite14 (Common)Workspace variable Screen x-coordinate for sprite 14
xSprite15 (Common)Workspace variable Screen x-coordinate for sprite 15
xSprite16 (Common)Workspace variable Screen x-coordinate for sprite 16
xSprite17 (Common)Workspace variable Screen x-coordinate for sprite 17
xSprite18 (Common)Workspace variable Screen x-coordinate for sprite 18
xSprite19 (Common)Workspace variable Screen x-coordinate for sprite 19
xSprite2 (Common)Workspace variable Screen x-coordinate for sprite 2
xSprite20 (Common)Workspace variable Screen x-coordinate for sprite 20
xSprite21 (Common)Workspace variable Screen x-coordinate for sprite 21
xSprite22 (Common)Workspace variable Screen x-coordinate for sprite 22
xSprite23 (Common)Workspace variable Screen x-coordinate for sprite 23
xSprite24 (Common)Workspace variable Screen x-coordinate for sprite 24
xSprite25 (Common)Workspace variable Screen x-coordinate for sprite 25
xSprite26 (Common)Workspace variable Screen x-coordinate for sprite 26
xSprite27 (Common)Workspace variable Screen x-coordinate for sprite 27
xSprite28 (Common)Workspace variable Screen x-coordinate for sprite 28
xSprite29 (Common)Workspace variable Screen x-coordinate for sprite 29
xSprite3 (Common)Workspace variable Screen x-coordinate for sprite 3
xSprite30 (Common)Workspace variable Screen x-coordinate for sprite 30
xSprite31 (Common)Workspace variable Screen x-coordinate for sprite 31
xSprite32 (Common)Workspace variable Screen x-coordinate for sprite 32
xSprite33 (Common)Workspace variable Screen x-coordinate for sprite 33
xSprite34 (Common)Workspace variable Screen x-coordinate for sprite 34
xSprite35 (Common)Workspace variable Screen x-coordinate for sprite 35
xSprite36 (Common)Workspace variable Screen x-coordinate for sprite 36
xSprite37 (Common)Workspace variable Screen x-coordinate for sprite 37
xSprite38 (Common)Workspace variable Screen x-coordinate for sprite 38
xSprite39 (Common)Workspace variable Screen x-coordinate for sprite 39
xSprite4 (Common)Workspace variable Screen x-coordinate for sprite 4
xSprite40 (Common)Workspace variable Screen x-coordinate for sprite 40
xSprite41 (Common)Workspace variable Screen x-coordinate for sprite 41
xSprite42 (Common)Workspace variable Screen x-coordinate for sprite 42
xSprite43 (Common)Workspace variable Screen x-coordinate for sprite 43
xSprite44 (Common)Workspace variable Screen x-coordinate for sprite 44
xSprite45 (Common)Workspace variable Screen x-coordinate for sprite 45
xSprite46 (Common)Workspace variable Screen x-coordinate for sprite 46
xSprite47 (Common)Workspace variable Screen x-coordinate for sprite 47
xSprite48 (Common)Workspace variable Screen x-coordinate for sprite 48
xSprite49 (Common)Workspace variable Screen x-coordinate for sprite 49
xSprite5 (Common)Workspace variable Screen x-coordinate for sprite 5
xSprite50 (Common)Workspace variable Screen x-coordinate for sprite 50
xSprite51 (Common)Workspace variable Screen x-coordinate for sprite 51
xSprite52 (Common)Workspace variable Screen x-coordinate for sprite 52
xSprite53 (Common)Workspace variable Screen x-coordinate for sprite 53
xSprite54 (Common)Workspace variable Screen x-coordinate for sprite 54
xSprite55 (Common)Workspace variable Screen x-coordinate for sprite 55
xSprite56 (Common)Workspace variable Screen x-coordinate for sprite 56
xSprite57 (Common)Workspace variable Screen x-coordinate for sprite 57
xSprite58 (Common)Workspace variable Screen x-coordinate for sprite 58
xSprite59 (Common)Workspace variable Screen x-coordinate for sprite 59
xSprite6 (Common)Workspace variable Screen x-coordinate for sprite 6
xSprite60 (Common)Workspace variable Screen x-coordinate for sprite 60
xSprite61 (Common)Workspace variable Screen x-coordinate for sprite 61
xSprite62 (Common)Workspace variable Screen x-coordinate for sprite 62
xSprite63 (Common)Workspace variable Screen x-coordinate for sprite 63
xSprite7 (Common)Workspace variable Screen x-coordinate for sprite 7
xSprite8 (Common)Workspace variable Screen x-coordinate for sprite 8
xSprite9 (Common)Workspace variable Screen x-coordinate for sprite 9
xStatusMode (Bank 0)StatusThe text column for the Status Mode entries for each language
xTitleScreen (Bank 7)Start and endThe text column for the title screen's title for each language
XX (Common)Workspace variable Temporary storage, typically used for storing a 16-bit x-coordinate
XX0 (Common)Workspace variable Temporary storage, used to store the address of a ship blueprint. For example, it is used when we add a new ship to the local bubble in routine NWSHP, and it contains the address of the current ship's blueprint as we loop through all the nearby ships in the main flight loop
XX1 (Common)Workspace variable This is an alias for INWK that is used in the main ship-drawing routine at LL9
XX12 (Common)Workspace variable Temporary storage for a block of values, used in a number of places
XX13 (Common)Workspace variable Temporary storage, typically used in the line-drawing routines
XX14 (Common)Workspace variable This byte appears to be unused
XX15 (Common)Workspace variable Temporary storage, typically used for storing screen coordinates in line-drawing routines
XX16 (Common)Workspace variable Temporary storage for a block of values, used in a number of places
XX17 (Common)Workspace variable Temporary storage, used in BPRNT to store the number of characters to print, and as the edge counter in the main ship-drawing routine
XX18 (Common)Workspace variable Temporary storage used to store coordinates in the LL9 ship-drawing routine
XX2 (Common)Workspace variable Temporary storage, used to store the visibility of the ship's faces during the ship-drawing routine at LL9
XX20 (Common)Workspace variable Temporary storage, used in a number of places
XX21 (Bank 7)Drawing shipsShip blueprints lookup table
XX3 (Common)WorkspacesTemporary storage space for complex calculations
XX4 (Common)Workspace variable Temporary storage, used in a number of places
Y1 (Common)Workspace variable Temporary storage, typically used for y-coordinates in line-drawing routines
Y1TB (Common)Workspace variable The y-coordinates of the start and end points for character lines in the scroll text, with the start point (Y1) in the low nibble and the end point (Y2) in the high nibble
Y2 (Common)Workspace variable Temporary storage, typically used for y-coordinates in line-drawing routines
YC (Common)Workspace variable The y-coordinate of the text cursor (i.e. the text row), which can be from 0 to 23
yCash (Bank 0)MarketThe text row for the cash levels on the Market Price page
YESNO (Bank 0)ControllersDisplay "YES" or "NO" and wait until one is chosen
yHangarFloor (Bank 1)Ship hangarPixel y-coordinates for the four horizontal lines that make up the floor of the ship hangar
yHeadshot (Bank 0)StatusThe text row for the headshot on the Status Mode page
yIconBarPointer (Common)Workspace variable The y-coordinate of the icon bar pointer
yLanguage (Bank 6)Start and endThe text row for the language buttons on the Start screen
yLookupHi (Bank 7)Drawing pixelsLookup table for converting pixel y-coordinate to tile number (high byte)
yLookupLo (Bank 7)Drawing pixelsLookup table for converting pixel y-coordinate to tile number (low byte)
yMarketPrice (Bank 0)MarketThe text row for the Market Price title for each language
YP (Common)Workspace variable The y-coordinate of the current character as we construct the lines for the Star Wars scroll text
ypl (Bank 0)UniversePrint the current system name
ypl-1 (Bank 0)UniverseContains an RTS
ypls (Bank 0)TextPrint the current system name
YSAV (Common)Workspace variable Temporary storage for saving the value of the Y register, used in a number of places
YSAV2 (Common)Workspace variable Temporary storage, used for storing the value of the Y register in the CHPR routine
ySprite0 (Common)Workspace variable Screen y-coordinate for sprite 0
ySprite1 (Common)Workspace variable Screen y-coordinate for sprite 1
ySprite10 (Common)Workspace variable Screen y-coordinate for sprite 10
ySprite11 (Common)Workspace variable Screen y-coordinate for sprite 11
ySprite12 (Common)Workspace variable Screen y-coordinate for sprite 12
ySprite13 (Common)Workspace variable Screen y-coordinate for sprite 13
ySprite14 (Common)Workspace variable Screen y-coordinate for sprite 14
ySprite15 (Common)Workspace variable Screen y-coordinate for sprite 15
ySprite16 (Common)Workspace variable Screen y-coordinate for sprite 16
ySprite17 (Common)Workspace variable Screen y-coordinate for sprite 17
ySprite18 (Common)Workspace variable Screen y-coordinate for sprite 18
ySprite19 (Common)Workspace variable Screen y-coordinate for sprite 19
ySprite2 (Common)Workspace variable Screen y-coordinate for sprite 2
ySprite20 (Common)Workspace variable Screen y-coordinate for sprite 20
ySprite21 (Common)Workspace variable Screen y-coordinate for sprite 21
ySprite22 (Common)Workspace variable Screen y-coordinate for sprite 22
ySprite23 (Common)Workspace variable Screen y-coordinate for sprite 23
ySprite24 (Common)Workspace variable Screen y-coordinate for sprite 24
ySprite25 (Common)Workspace variable Screen y-coordinate for sprite 25
ySprite26 (Common)Workspace variable Screen y-coordinate for sprite 26
ySprite27 (Common)Workspace variable Screen y-coordinate for sprite 27
ySprite28 (Common)Workspace variable Screen y-coordinate for sprite 28
ySprite29 (Common)Workspace variable Screen y-coordinate for sprite 29
ySprite3 (Common)Workspace variable Screen y-coordinate for sprite 3
ySprite30 (Common)Workspace variable Screen y-coordinate for sprite 30
ySprite31 (Common)Workspace variable Screen y-coordinate for sprite 31
ySprite32 (Common)Workspace variable Screen y-coordinate for sprite 32
ySprite33 (Common)Workspace variable Screen y-coordinate for sprite 33
ySprite34 (Common)Workspace variable Screen y-coordinate for sprite 34
ySprite35 (Common)Workspace variable Screen y-coordinate for sprite 35
ySprite36 (Common)Workspace variable Screen y-coordinate for sprite 36
ySprite37 (Common)Workspace variable Screen y-coordinate for sprite 37
ySprite38 (Common)Workspace variable Screen y-coordinate for sprite 38
ySprite39 (Common)Workspace variable Screen y-coordinate for sprite 39
ySprite4 (Common)Workspace variable Screen y-coordinate for sprite 4
ySprite40 (Common)Workspace variable Screen y-coordinate for sprite 40
ySprite41 (Common)Workspace variable Screen y-coordinate for sprite 41
ySprite42 (Common)Workspace variable Screen y-coordinate for sprite 42
ySprite43 (Common)Workspace variable Screen y-coordinate for sprite 43
ySprite44 (Common)Workspace variable Screen y-coordinate for sprite 44
ySprite45 (Common)Workspace variable Screen y-coordinate for sprite 45
ySprite46 (Common)Workspace variable Screen y-coordinate for sprite 46
ySprite47 (Common)Workspace variable Screen y-coordinate for sprite 47
ySprite48 (Common)Workspace variable Screen y-coordinate for sprite 48
ySprite49 (Common)Workspace variable Screen y-coordinate for sprite 49
ySprite5 (Common)Workspace variable Screen y-coordinate for sprite 5
ySprite50 (Common)Workspace variable Screen y-coordinate for sprite 50
ySprite51 (Common)Workspace variable Screen y-coordinate for sprite 51
ySprite52 (Common)Workspace variable Screen y-coordinate for sprite 52
ySprite53 (Common)Workspace variable Screen y-coordinate for sprite 53
ySprite54 (Common)Workspace variable Screen y-coordinate for sprite 54
ySprite55 (Common)Workspace variable Screen y-coordinate for sprite 55
ySprite56 (Common)Workspace variable Screen y-coordinate for sprite 56
ySprite57 (Common)Workspace variable Screen y-coordinate for sprite 57
ySprite58 (Common)Workspace variable Screen y-coordinate for sprite 58
ySprite59 (Common)Workspace variable Screen y-coordinate for sprite 59
ySprite6 (Common)Workspace variable Screen y-coordinate for sprite 6
ySprite60 (Common)Workspace variable Screen y-coordinate for sprite 60
ySprite61 (Common)Workspace variable Screen y-coordinate for sprite 61
ySprite62 (Common)Workspace variable Screen y-coordinate for sprite 62
ySprite63 (Common)Workspace variable Screen y-coordinate for sprite 63
ySprite7 (Common)Workspace variable Screen y-coordinate for sprite 7
ySprite8 (Common)Workspace variable Screen y-coordinate for sprite 8
ySprite9 (Common)Workspace variable Screen y-coordinate for sprite 9
Yx2M1 (Common)Workspace variable The height of the drawable part of the screen in pixels minus 1, often used when calculating the y-coordinate of the bottom pixel row of the space view
YY (Common)Workspace variable Temporary storage, typically used for storing a 16-bit y-coordinate
Ze (Bank 7)UniverseInitialise the INWK workspace to a hostile ship
ZERO (Bank 0)Utility routinesReset the local bubble of universe and ship status
ZINF (Bank 0)UniverseReset the INWK workspace and orientation vectors
ZINF_b1 (Bank 1)UniverseReset the INWK workspace and orientation vectors
ZP (Common)WorkspacesLots of important variables are stored in the zero page workspace as it is quicker and more space-efficient to access memory here
ZZ (Common)Workspace variable Temporary storage, typically used for distance values
zZ+1 (Bank 0)FlightContains an RTS