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⌂ ∞ ▽ Elite on the 6502

Version analysis of BEEP

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

Code variations between these versions are shown below.

       Name: BEEP
       Type: Subroutine
   Category: Sound
    Summary: Make a short, high beep



.BEEP

Code variation 1 of 1Minor and very low-impact

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Cassette, Electron
Flight, Docked, 6502SP
Master
 LDA #32                \ Set A = 32 to denote a short, high beep, and fall
                        \ through into the NOISE routine to make the sound

 LDA #32                \ Call the NOISE routine with A = 32 to make a short,
 BNE NOISE              \ high beep, returning from the subroutine using a tail
                        \ call (this BNE is effectively a JMP as A will never be
                        \ zero)

 LDY #sobeep            \ Call the NOISE routine with Y = 1 to make a short,
 BRA NOISE              \ high beep, returning from the subroutine using a tail
                        \ call