GSCats/sound.s
blondie7575 2b5e7a29f0 Added shoot animations and more sound
Animation system now supports multiple sprite sizes
2023-07-05 20:27:47 -07:00

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