Apple-2-SW
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Applecorn
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Enable up to 16 envelopes.

This commit is contained in:
Bobbi Webber-Manners 2022-11-24 16:34:23 -05:00
parent 943cce4f70
commit b5b599aa1f
1 changed files with 4 additions and 2 deletions
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6
auxmem.audio.s
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@ -1,7 +1,9 @@
* AUXMEM.AUDIO.S
* (c) Bobbi 2022 GPLv3
*
* Applecorn audio code
* Applecorn audio code.
* This auxiliary memory code implements OSWORD &07 and &08, enqueueing events
* for the audio engine that lives in main memory (MAINMEM.AUDIO.S).
*
* OSWORD &07 - Make a sound
@ -67,7 +69,7 @@ WORD07 INY
* Supports 4 envelopes for now, could be extended for more
WORD08 LDA (OSCTRL),Y ; Get envelope number
DEC A ; Make it zero-based
CMP #$03 ; Check in range
CMP #$15 ; Check in range
BPL :RTS ; Ignore if out of range
TAX
LDA #$00