The BR1 (Part 1 of 2) subroutine - Elite on the BBC Micro and NES

       Name: BR1 (Part 1 of 2)                                       [Show more]
       Type: Subroutine
   Category: Start and end
    Summary: Show the "Load New Commander (Y/N)?" screen and start the game
    Context: See this subroutine in context in the source code
 Variations: See code variations for this subroutine in the different versions
 References: This subroutine is called as follows:
             * BRBR calls BR1
             * TT102 calls via QU5


 Other entry points:

   QU5                  Restart the game using the last saved commander without
                        asking whether to load a new commander file


.BR1

 JSR ZEKTRAN            \ Reset the key logger buffer that gets returned from
                        \ the I/O processor

 LDA #3                 \ Move the text cursor to column 3
 JSR DOXC

 LDX #3                 \ Set X = 3 for the call to FX200

 JSR FX200              \ Disable the ESCAPE key and clear memory if the BREAK
                        \ key is pressed (*FX 200,3)

IF _EXECUTIVE

 LDX #3                 \ Call TALK with X = 3 to say "Elite" using the Watford
 JSR TALK               \ Electronics Beeb Speech Synthesiser (if one is fitted
                        \ and speech has been enabled)

ENDIF

 LDX #CYL               \ Call TITLE to show a rotating Cobra Mk III (#CYL) and
 LDA #6                 \ token 6 ("LOAD NEW {single cap}COMMANDER {all caps}
 JSR TITLE              \ (Y/N)?{sentence case}{cr}{cr}"), returning with the
                        \ internal number of the key pressed in A

 CMP #&60               \ Did we press TAB? If not, skip the following
 BNE P%+5               \ instruction

.BRGO

 JMP DEMON              \ We pressed TAB, so jump to DEMON to show the demo

 CMP #&44               \ Did we press "Y"? If not, jump to QU5, otherwise
 BNE QU5                \ continue on to load a new commander

 JSR DFAULT             \ Call DFAULT to reset the current commander data block
                        \ to the last saved commander

 JSR SVE                \ Call SVE to load a new commander into the last saved
                        \ commander data block

.QU5

 JSR DFAULT             \ Call DFAULT to reset the current commander data block
                        \ to the last saved commander

[X]

Configuration variable CYL = 11

Ship type for a Cobra Mk III

[X]

Subroutine DEMON (category: Demo)

Show the demo

[X]

Subroutine DFAULT (category: Start and end)

Reset the current commander data block to the last saved commander

[X]

Subroutine DOXC (category: Text)

Move the text cursor to a specified column by sending a #SETXC command to the I/O processor

[X]

Subroutine FX200 (category: Utility routines)

Set the behaviour of the ESCAPE and BREAK keys

[X]

Entry point QU5 in subroutine BR1 (Part 1 of 2) (category: Start and end)

Restart the game using the last saved commander without asking whether to load a new commander file

[X]

Subroutine SVE (category: Save and load)

Display the disc access menu and process saving of commander files

[X]

Subroutine TALK (category: Sound)

Speak using the Watford Electronics Beeb Speech Synthesiser

[X]

Subroutine TITLE (category: Start and end)

Display a title screen with a rotating ship and prompt

[X]

Subroutine ZEKTRAN (category: Keyboard)

Reset the key logger buffer at KTRAN

Start and end: BR1 (Part 1 of 2)

[6502 Second Processor version]