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Elite on the BBC Micro

Sound: EXNO2 (Disc version)

       Name: EXNO2                                             [View in context]
       Type: Subroutine                                       [Compare versions]
   Category: Sound
    Summary: Process us making a kill
  Deep dive: Combat rank



 We have killed a ship, so increase the kill tally, displaying an iconic
 message of encouragement if the kill total is a multiple of 256, and then
 make a nearby explosion sound.

 Other entry points:

   EXNO-2               Set X = 7 and fall through into EXNO to make the sound
                        of a ship exploding



.EXNO2

 INC TALLY              \ Increment the low byte of the kill count in TALLY

 BNE EXNO-2             \ If there is no carry, jump to the LDX #7 below (at
                        \ EXNO-2)

 INC TALLY+1            \ Increment the high byte of the kill count in TALLY

 LDA #101               \ The kill total is a multiple of 256, so it's time
 JSR MESS               \ for a pat on the back, so print recursive token 101
                        \ ("RIGHT ON COMMANDER!") as an in-flight message

 LDX #7                 \ Set X = 7 and fall through into EXNO to make the
                        \ sound of a ship exploding