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⌂ ∞ ▽ Elite on the 6502

Version analysis of EXNO3

This code appears in the following versions (click to see it in the source code):

Code variations between these versions are shown below.

       Name: EXNO3
       Type: Subroutine
   Category: Sound
    Summary: Make an explosion sound



 Make the sound of death in the cold, hard vacuum of space. Apparently, in
 Elite space, everyone can hear you scream.

 This routine also makes the sound of a destroyed cargo canister if we don't
 get scooping right, the sound of us colliding with another ship, and the sound
 of us being hit with depleted shields. It is not a good sound to hear.



.EXNO3

Code variation 1 of 1Related to the Master version

The Master version has a unique explosion sound.

Tap on a block to expand it, and tap it again to revert.

Cassette, Flight, Docked, 6502SP
Master
Electron
 LDA #16                \ Call the NOISE routine with A = 16 to make the first
 JSR NOISE              \ death sound

 LDA #24                \ Call the NOISE routine with A = 24 to make the second
 BNE NOISE              \ death sound and return from the subroutine using a
                        \ tail call (this BNE is effectively a JMP as A will
                        \ never be zero)

 LDY #soexpl            \ Call the NOISE routine with Y = 4 to make the sound of
 JMP NOISE              \ an explosion and return from the subroutine using a
                        \ tail call

 LDA #24                \ Call the NOISE routine with A = 24 to make the
 BNE NOISE              \ death sound and return from the subroutine using a
                        \ tail call (this BNE is effectively a JMP as A will
                        \ never be zero)