321 lines
7.1 KiB
ArmAsm
321 lines
7.1 KiB
ArmAsm
;
|
|
; sound
|
|
; Code and data structures for playing sound effects
|
|
;
|
|
; Created by Quinn Dunki on 6/30/23
|
|
;
|
|
|
|
|
|
NUM_SOUNDS = 5
|
|
|
|
SOUND_HOWL=0
|
|
SOUND_MEOW1=2
|
|
SOUND_MEOW2=4
|
|
SOUND_MEOW3=6
|
|
SOUND_MEOW4=8
|
|
|
|
|
|
soundTable:
|
|
; Sound Ram Address, Wave Size, Low Frequency
|
|
.byte $00,WAVE_SIZE_8192,200 ; SOUND_HOWL
|
|
.byte $20,WAVE_SIZE_8192,150 ; SOUND_MEOW1
|
|
.byte $40,WAVE_SIZE_8192,200 ; SOUND_MEOW2
|
|
.byte $60,WAVE_SIZE_8192,150 ; SOUND_MEOW3
|
|
.byte $80,WAVE_SIZE_8192,150 ; SOUND_MEOW4
|
|
|
|
|
|
; Ensoniq Control Register bit patterns
|
|
DOC_RAMACCESS = $40 ; or
|
|
DOC_DOCACCESS = $bf ; and
|
|
DOC_AUTOINC = $20 ; or
|
|
DOC_NOINC = $df ; and
|
|
|
|
; Oscillator Control Register bit patterns
|
|
OSC_MODE_FREE = $00
|
|
OSC_MODE_ONESHOT = $02
|
|
OSC_MODE_SYNC = $04
|
|
OSC_MODE_SWAP = $06
|
|
|
|
OSC_CHANNEL_ALL = $70
|
|
OSC_CHANNEL_RIGHT = $00
|
|
OSC_CHANNEL_LEFT = $10
|
|
|
|
; Internal oscillator-related registers (additional per-oscillator registers per the big table on page 110 of Apple IIGS Hardware Reference Manual)
|
|
OSC_REG_INTERRUPT = $e0
|
|
OSC_REG_ENABLE = $e1
|
|
OSC_REG_DIGITIZE = $e2
|
|
|
|
; Wave table page size bit patterns
|
|
WAVE_SIZE_256 = $07
|
|
WAVE_SIZE_512 = $0f
|
|
WAVE_SIZE_1024 = $17
|
|
WAVE_SIZE_2048 = $1f
|
|
WAVE_SIZE_4096 = $27
|
|
WAVE_SIZE_8192 = $2f
|
|
WAVE_SIZE_16384 = $37
|
|
WAVE_SIZE_32768 = $3f
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; ENSONIQ_WAIT
|
|
;
|
|
; Polls the high bit of the Sound Control Register, which tells us when we're allowed
|
|
; to talk to the DOC
|
|
;
|
|
.macro ENSONIQ_WAIT
|
|
.local busyLoop
|
|
BITS8A
|
|
busyLoop:
|
|
lda ENSONIQ_CONTROL
|
|
bmi busyLoop
|
|
BITS16
|
|
.endmacro
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; writeInternalRegister - Call in 8 BIT MODE ONLY (also why it's a macro)
|
|
;
|
|
; Writes to the internal registers of the Ensoniq
|
|
;
|
|
; A = Data to write (8 bits)
|
|
; X = Register number to write to (8 bits)
|
|
;
|
|
; Trashes A
|
|
;
|
|
.macro writeInternalRegister
|
|
pha
|
|
txa
|
|
sta ENSONIQ_ADDRL
|
|
pla
|
|
sta ENSONIQ_DATA
|
|
.endmacro
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; writeInternalRegisterPair - Call in 8 BIT MODE ONLY (also why it's a macro)
|
|
;
|
|
; Writes to the internal registers of the Ensoniq for a pair of oscillators
|
|
;
|
|
; A = Data to write (8 bits)
|
|
; X = Register number to write to (8 bits). X+1 will also be written
|
|
;
|
|
; Trashes A
|
|
;
|
|
.macro writeInternalRegisterPair
|
|
pha
|
|
txa
|
|
sta ENSONIQ_ADDRL
|
|
pla
|
|
sta ENSONIQ_DATA
|
|
pha
|
|
inx
|
|
txa
|
|
sta ENSONIQ_ADDRL
|
|
pla
|
|
sta ENSONIQ_DATA
|
|
.endmacro
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; initSoundSystem
|
|
;
|
|
; Trashes SCRATCHL
|
|
;
|
|
initSoundSystem:
|
|
SAVE_AXY
|
|
|
|
ENSONIQ_WAIT
|
|
|
|
; Load sound file bank into Ensoniq RAM
|
|
lda #$0000 ; Sound location in bank 4
|
|
sta PARAML0
|
|
ldx #$04
|
|
lda soundBankSize ; Far pointer
|
|
tay
|
|
jsr copyToSoundRAM
|
|
|
|
; Configure all our oscillators
|
|
lda #0
|
|
sta SCRATCHL
|
|
|
|
ldy #0
|
|
|
|
initSoundSystemLoop:
|
|
|
|
BITS8A
|
|
lda soundTable,y
|
|
sta PARAM0
|
|
iny
|
|
lda soundTable,y
|
|
sta PARAM1
|
|
iny
|
|
lda soundTable,y
|
|
sta PARAM2
|
|
iny
|
|
BITS16
|
|
|
|
phy
|
|
ldy SCRATCHL
|
|
jsr configureOscillatorPair
|
|
|
|
iny
|
|
iny
|
|
cpy #NUM_SOUNDS*2
|
|
beq initSoundSystemReady
|
|
sty SCRATCHL
|
|
ply
|
|
bra initSoundSystemLoop
|
|
|
|
initSoundSystemReady:
|
|
ply
|
|
|
|
; Enable oscillators (see page 108 of Apple IIGS Hardware Reference Manual)
|
|
BITS8
|
|
lda #(NUM_SOUNDS*2)<<1 ; Two oscillators per sound and leaving low bit untouched
|
|
ldx #OSC_REG_ENABLE
|
|
writeInternalRegister
|
|
BITS16
|
|
|
|
RESTORE_AXY
|
|
rts
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; playSound
|
|
;
|
|
; Y = Oscillator to start (+1 also starts)
|
|
;
|
|
playSound:
|
|
SAVE_AX
|
|
|
|
ENSONIQ_WAIT
|
|
|
|
BITS8
|
|
|
|
; Configure run mode for our oscillators
|
|
lda #OSC_CHANNEL_RIGHT | OSC_MODE_ONESHOT
|
|
ldx docRegisterTableControl,y
|
|
writeInternalRegister
|
|
|
|
lda #OSC_CHANNEL_LEFT | OSC_MODE_ONESHOT
|
|
ldx docRegisterTableControl+1,y
|
|
writeInternalRegister
|
|
|
|
BITS16
|
|
RESTORE_AX
|
|
rts
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; configureOscillatorPair
|
|
;
|
|
; Y = Oscillator number (+1 will also be configured)
|
|
; PARAM0 = Wave table address (one byte)
|
|
; PARAM1 = Wave table page size (must use WAVE_SIZE constants)
|
|
; PARAM2 = Low frequency (high frequency is always 0)
|
|
;
|
|
configureOscillatorPair:
|
|
SAVE_AXY
|
|
ENSONIQ_WAIT
|
|
BITS8
|
|
|
|
; Configure low frequency
|
|
lda PARAM2
|
|
ldx docRegisterTableLowFreq,y
|
|
writeInternalRegisterPair
|
|
|
|
; Configure high frequency
|
|
lda #0
|
|
ldx docRegisterTableHighFreq,y
|
|
writeInternalRegisterPair
|
|
|
|
; Configure volume
|
|
lda #$ff ; This is relative to system volume, so set it to max
|
|
ldx docRegisterTableVolume,y
|
|
writeInternalRegisterPair
|
|
|
|
; Configure sound RAM pointer
|
|
lda PARAM0
|
|
ldx docRegisterTableWavePointer,y
|
|
writeInternalRegisterPair
|
|
|
|
; Configure sound RAM size
|
|
; Format of this register is tricky. See page 114 of Apple IIGS Hardware Reference Manual
|
|
lda PARAM1
|
|
ldx docRegisterTableWaveSize,y
|
|
writeInternalRegisterPair
|
|
|
|
BITS16
|
|
RESTORE_AXY
|
|
rts
|
|
|
|
; DOC register locations for each oscillator
|
|
docRegisterTableLowFreq:
|
|
.byte $00,$01,$02,$03,$04,$05,$06,$07,$08,$09,$0a,$0b,$0c,$0d,$0e,$0f,$10,$11,$12,$13,$14,$15,$16,$17,$18,$19,$1a,$1b,$1c,$1d,$1e,$1f
|
|
docRegisterTableHighFreq:
|
|
.byte $20,$21,$22,$23,$24,$25,$26,$27,$28,$29,$2a,$2b,$2c,$2d,$2e,$2f,$30,$31,$32,$33,$34,$35,$36,$37,$38,$39,$3a,$3b,$3c,$3d,$3e,$3f
|
|
docRegisterTableVolume:
|
|
.byte $40,$41,$42,$43,$44,$45,$46,$47,$48,$49,$4a,$4b,$4c,$4d,$4e,$4f,$50,$51,$52,$53,$54,$55,$56,$57,$58,$59,$5a,$5b,$5c,$5d,$5e,$5f
|
|
docRegisterTableData:
|
|
.byte $60,$61,$62,$63,$64,$65,$66,$67,$68,$69,$6a,$6b,$6c,$6d,$6e,$6f,$70,$71,$72,$73,$74,$75,$76,$77,$78,$79,$7a,$7b,$7c,$7d,$7e,$7f
|
|
docRegisterTableWavePointer:
|
|
.byte $80,$81,$82,$83,$84,$85,$86,$87,$88,$89,$8a,$8b,$8c,$8d,$8e,$8f,$90,$91,$92,$93,$94,$95,$96,$97,$98,$99,$9a,$9b,$9c,$9d,$9e,$9f
|
|
docRegisterTableControl:
|
|
.byte $a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7,$a8,$a9,$aa,$ab,$ac,$ad,$ae,$af,$b0,$b1,$b2,$b3,$b4,$b5,$b6,$b7,$b8,$b9,$ba,$bb,$bc,$bd,$be,$bf
|
|
docRegisterTableWaveSize:
|
|
.byte $c0,$c1,$c2,$c3,$c4,$c5,$c6,$c7,$c8,$c9,$ca,$cb,$cc,$cd,$ce,$cf,$d0,$d1,$d2,$d3,$d4,$d5,$d6,$d7,$d8,$d9,$da,$db,$dc,$dd,$de,$df
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; copyToSoundRAM
|
|
;
|
|
; Copies data from main RAM to sound RAM
|
|
;
|
|
; PARAML0 = Pointer to sound data in main RAM
|
|
; X = Bank number of sound data in main RAM
|
|
; Y = Size of sound bank in bytes
|
|
;
|
|
; Trashes SCRATCHL
|
|
;
|
|
copyToSoundRAM:
|
|
SAVE_AXY
|
|
sty SCRATCHL
|
|
|
|
ENSONIQ_WAIT
|
|
|
|
lda #0
|
|
BITS8
|
|
stx copyToSoundRAMLoop+3 ; Self modifying code. Don't panic
|
|
|
|
; Enable sound RAM access and auto-increment mode
|
|
lda ENSONIQ_CONTROL
|
|
ora #DOC_RAMACCESS | DOC_AUTOINC
|
|
sta ENSONIQ_CONTROL
|
|
BITS16
|
|
|
|
; Prepare start address in sound RAM
|
|
lda #$0000
|
|
sta ENSONIQ_ADDRL
|
|
|
|
; Copy all the data
|
|
lda #0
|
|
BITS8A
|
|
ldx #0
|
|
|
|
copyToSoundRAMLoop:
|
|
lda $ff0000,x ; Note: 8 bit accumulator! DOC takes one byte at a time
|
|
sta ENSONIQ_DATA ; Do not use indexed addressing here- see page 107 of Apple IIGS Hardware Reference Manual
|
|
inx
|
|
cpx SCRATCHL
|
|
bne copyToSoundRAMLoop
|
|
|
|
; Enable DOC access and disable auto-increment mode
|
|
; This is a nicer mode to leave the Ensoniq in for normal usage once loading is complete
|
|
lda ENSONIQ_CONTROL
|
|
and #DOC_DOCACCESS & DOC_NOINC
|
|
sta ENSONIQ_CONTROL
|
|
|
|
BITS16
|
|
RESTORE_AXY
|
|
rts
|
|
|