ORG &008B .DL SKIP 1 \ Vertical sync flag \ \ DL gets set to 30 every time we reach vertical sync on \ the video system, which happens 50 times a second \ (50Hz). The WSCAN routine uses this to pause until the \ vertical sync, by setting DL to 0 and then monitoring \ its value until it changes to 30 \ \ [Show more]Name: ZP [Show more] Type: Workspace Address: &008B to &009F Category: Workspaces Summary: Important variables used by the I/O processorContext: See this workspace in context in the source code References: No direct references to this workspace in this source file\ \ This variable is used by the following: \ \ * WSCAN \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned aboveORG &0090 .key_tube SKIP 2 \ Contains the address of the I/O processor's keyboard \ translation table (as opposed to the parasite's \ table), which is used to translate internal key \ numbers to ASCII in the I/O processor code \ \ [Show more]\ \ This variable is used by the following: \ \ * get_key \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.SC SKIP 1 \ Screen address (low byte) \ \ Elite draws on-screen by poking bytes directly into \ screen memory, and SC(1 0) is typically set to the \ address of the character block containing the pixel \ we want to draw (see the deep dives on "Drawing \ monochrome pixels in mode 4" and "Drawing colour \ pixels in mode 5" for more details) \ \ [Show more]\ \ This variable is used by the following: \ \ * BULB \ * CLYNS \ * CPIX2 \ * DIL2 \ * DILX \ * draw_tail \ * HA2 \ * HANGER \ * HAS2 \ * HAS3 \ * HLOIN \ * LOIN (Part 2 of 7) \ * LOIN (Part 3 of 7) \ * LOIN (Part 4 of 7) \ * LOIN (Part 5 of 7) \ * LOIN (Part 6 of 7) \ * LOIN (Part 7 of 7) \ * LYN \ * MSBAR \ * PIXEL \ * printer \ * PX3 \ * tube_wrch \ * wrch_font \ * ZES1 \ * ZES2 \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.SCH SKIP 1 \ Screen address (high byte) \ \ [Show more]\ \ This variable is used by the following: \ \ * CPIX2 \ * HLOIN \ * LOIN (Part 2 of 7) \ * LOIN (Part 3 of 7) \ * LOIN (Part 4 of 7) \ * LOIN (Part 5 of 7) \ * LOIN (Part 6 of 7) \ * LOIN (Part 7 of 7) \ * PIXEL \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.font .ZZ .bar_1 .angle_1 .missle_1 .picture_1 .print_bits .X1 SKIP 1 \ Temporary storage, typically used for x-coordinates in \ line-drawing routines \ \ [Show more]\ \ This variable is used by the following: \ \ * CPIX2 \ * draw_blob \ * draw_tail \ * HLOIN \ * LOIN (Part 1 of 7) \ * LOIN (Part 2 of 7) \ * LOIN (Part 5 of 7) \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.bar_2 .picture_2 .Y1 SKIP 1 \ Temporary storage, typically used for y-coordinates in \ line-drawing routines \ \ [Show more]\ \ This variable is used by the following: \ \ * CPIX2 \ * draw_blob \ * draw_tail \ * HLOIN \ * LOIN (Part 1 of 7) \ * LOIN (Part 2 of 7) \ * LOIN (Part 5 of 7) \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.bar_3 .K3 .COL .X2 SKIP 1 \ Temporary storage, typically used for x-coordinates in \ line-drawing routines \ \ [Show more]\ \ This variable is used by the following: \ \ * HLOIN \ * LOIN (Part 1 of 7) \ * LOIN (Part 2 of 7) \ * LOIN (Part 5 of 7) \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.XSAV2 .Y2 SKIP 1 \ Temporary storage, typically used for y-coordinates in \ line-drawing routines \ \ [Show more]\ \ This variable is used by the following: \ \ * draw_tail \ * LOIN (Part 1 of 7) \ * LOIN (Part 2 of 7) \ * LOIN (Part 5 of 7) \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.YSAV2 .P SKIP 1 \ Temporary storage, used in a number of places \ \ [Show more]\ \ This variable is used by the following: \ \ * draw_tail \ * HLOIN \ * LOIN (Part 1 of 7) \ * LOIN (Part 2 of 7) \ * LOIN (Part 5 of 7) \ * LOIN (Part 6 of 7) \ * LOIN (Part 7 of 7) \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.T .Q SKIP 1 \ Temporary storage, used in a number of places \ \ [Show more]\ \ This variable is used by the following: \ \ * LOIN (Part 1 of 7) \ * LOIN (Part 2 of 7) \ * LOIN (Part 3 of 7) \ * LOIN (Part 4 of 7) \ * LOIN (Part 5 of 7) \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.R SKIP 1 \ Temporary storage, used in a number of places \ \ [Show more]\ \ This variable is used by the following: \ \ * LOIN (Part 2 of 7) \ * LOIN (Part 3 of 7) \ * LOIN (Part 4 of 7) \ * LOIN (Part 5 of 7) \ * LOIN (Part 6 of 7) \ * LOIN (Part 7 of 7) \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.S SKIP 1 \ Temporary storage, used in a number of places \ \ [Show more]\ \ This variable is used by the following: \ \ * LOIN (Part 1 of 7) \ * LOIN (Part 3 of 7) \ * LOIN (Part 4 of 7) \ * LOIN (Part 6 of 7) \ * LOIN (Part 7 of 7) \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.SWAP SKIP 1 \ 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) \ \ [Show more]\ \ This variable is used by the following: \ \ * LOIN (Part 1 of 7) \ * LOIN (Part 2 of 7) \ * LOIN (Part 3 of 7) \ * LOIN (Part 4 of 7) \ * LOIN (Part 5 of 7) \ * LOIN (Part 6 of 7) \ * LOIN (Part 7 of 7) \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned aboveSKIP 1 .XC SKIP 1 \ The x-coordinate of the text cursor (i.e. the text \ column), which can be from 0 to 32 \ \ A value of 0 denotes the leftmost column and 32 the \ rightmost column, but because the top part of the \ screen (the space view) has a white border that \ clashes with columns 0 and 32, text is only shown \ in columns 1-31 \ \ [Show more]\ \ This variable is used by the following: \ \ * CHPR \ * tube_wrch \ * wrch_font \ \ This list only includes code that refers to the \ variable by name; there may be other references to \ this memory location that don't use this label, and \ these will not be mentioned above.YC SKIP 1 \ The y-coordinate of the text cursor (i.e. the text \ row), which can be from 0 to 23 \ \ The screen actually has 31 character rows if you \ include the dashboard, but the text printing routines \ only work on the top part (the space view), so the \ text cursor only goes up to a maximum of 23, the row \ just before the screen splits \ \ A value of 0 denotes the top row, but because the \ top part of the screen has a white border that clashes \ with row 0, text is always shown at row 1 or greater \ \ [Show more]