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Some bugfix. Pitch envelope more or less complete. Untested!

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Bobbi Webber-Manners 2022-10-15 03:32:39 -04:00
parent dd4ac31e4c
commit dec5df0707
2 changed files with 26 additions and 3 deletions
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applecorn.po
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mainmem.audio.s
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@ -464,6 +464,7 @@ GETENVADDR LDA #<ENVBUF0 ; Copy ENVBUF0 to A1L,A1H
DEY ; Decr envelopes remaining
BRA :L1 ; Go again
:DONE RTS
* Process pitch envelope
* On entry: X is audio channel #
@ -517,8 +518,7 @@ PITCHENV LDA CHANENV,X ; Set envelope number
UPDPITCH CLC
ADC CURRPITCH,X ; Add change to current
STA CURRPITCH,X ; Update
* TODO: Update Ensoniq too!
* Probably should have some ENSQxxx function for that
JSR ENSQFREQ ; Update Ensoniq regs
RTS
@ -654,8 +654,31 @@ ENSQNOTE PHA
PLA
RTS
* Adjust frequency of note already playing
* On entry: Y - frequency to set
* Preserves X & Y
ENSQFREQ PHX
PHY ; Gonna need it again
LDA FREQLOW,Y
TAY ; Frequency value LS byte
LDA #$00 ; DOC register base $00 (Freq Lo)
JSR ADDOSC ; Actual register in X
JSR ENSQWRTDOC
PLY ; Get freq back
PHY
LDA FREQHIGH,Y
TAY ; Frequency value MS byte
LDA #$20 ; DOC register base $20 (Freq Hi)
JSR ADDOSC ; Actual register in X
JSR ENSQWRTDOC
PLY
PLX
RTS
* Add oscillator number to value in A, return sum in X
* Used by ENSQNOTE
* Used by ENSQNOTE & ENSQFREQ
ADDOSC CLC
ADC OSCNUM
TAX