Version analysis of BEEP - Elite on the BBC Micro and NES

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

Cassette, Disc (flight), Disc (docked), 6502 Second Processor, Master and Electron

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

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

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