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s1.sounddriver.asm
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s1.sounddriver.asm
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; ---------------------------------------------------------------------------
; Modified SMPS 68k Type 1b sound driver
; The source code to a similar version of the driver can be found here:
; https://hiddenpalace.org/News/Sega_of_Japan_Sound_Documents_and_Source_Code
; ---------------------------------------------------------------------------
; Constants
SMPS_TRACK_COUNT = (SMPS_RAM.v_track_ram_end-SMPS_RAM.v_track_ram)/SMPS_Track.len
SMPS_MUSIC_TRACK_COUNT = (SMPS_RAM.v_music_track_ram_end-SMPS_RAM.v_music_track_ram)/SMPS_Track.len
SMPS_MUSIC_FM_DAC_TRACK_COUNT = (SMPS_RAM.v_music_fmdac_tracks_end-SMPS_RAM.v_music_fmdac_tracks)/SMPS_Track.len
SMPS_MUSIC_FM_TRACK_COUNT = (SMPS_RAM.v_music_fm_tracks_end-SMPS_RAM.v_music_fm_tracks)/SMPS_Track.len
SMPS_MUSIC_PSG_TRACK_COUNT = (SMPS_RAM.v_music_psg_tracks_end-SMPS_RAM.v_music_psg_tracks)/SMPS_Track.len
SMPS_SFX_TRACK_COUNT = (SMPS_RAM.v_sfx_track_ram_end-SMPS_RAM.v_sfx_track_ram)/SMPS_Track.len
SMPS_SFX_FM_TRACK_COUNT = (SMPS_RAM.v_sfx_fm_tracks_end-SMPS_RAM.v_sfx_fm_tracks)/SMPS_Track.len
SMPS_SFX_PSG_TRACK_COUNT = (SMPS_RAM.v_sfx_psg_tracks_end-SMPS_RAM.v_sfx_psg_tracks)/SMPS_Track.len
SMPS_SPECIAL_SFX_TRACK_COUNT = (SMPS_RAM.v_spcsfx_track_ram_end-SMPS_RAM.v_spcsfx_track_ram)/SMPS_Track.len
SMPS_SPECIAL_SFX_FM_TRACK_COUNT = (SMPS_RAM.v_spcsfx_fm_tracks_end-SMPS_RAM.v_spcsfx_fm_tracks)/SMPS_Track.len
SMPS_SPECIAL_SFX_PSG_TRACK_COUNT = (SMPS_RAM.v_spcsfx_psg_tracks_end-SMPS_RAM.v_spcsfx_psg_tracks)/SMPS_Track.len
; ---------------------------------------------------------------------------
; Macros
; turn a sample rate into a djnz loop counter
pcmLoopCounterBase function sampleRate,baseCycles, 1+(Z80_Clock/(sampleRate)-(baseCycles)+(13/2))/13
pcmLoopCounter function sampleRate, pcmLoopCounterBase(sampleRate,90) ; 90 is the number of cycles zPlaySEGAPCMLoop takes to deliver one sample.
dpcmLoopCounter function sampleRate, pcmLoopCounterBase(sampleRate,301/2) ; 301 is the number of cycles zPlayPCMLoop takes to deliver two samples.
; ---------------------------------------------------------------------------
; Go_SoundTypes:
Go_SoundPriorities: dc.l SoundPriorities
; Go_SoundD0:
Go_SpecSoundIndex: dc.l SpecSoundIndex
Go_MusicIndex: dc.l MusicIndex
Go_SoundIndex: dc.l SoundIndex
; off_719A0:
Go_SpeedUpIndex: dc.l SpeedUpIndex
Go_PSGIndex: dc.l PSG_Index
; ---------------------------------------------------------------------------
; PSG instruments used in music
; ---------------------------------------------------------------------------
PSG_Index:
dc.l PSG1, PSG2, PSG3
dc.l PSG4, PSG5, PSG6
dc.l PSG7, PSG8, PSG9
PSG1: binclude "sound/psg/psg1.bin"
PSG2: binclude "sound/psg/psg2.bin"
PSG3: binclude "sound/psg/psg3.bin"
PSG4: binclude "sound/psg/psg4.bin"
PSG6: binclude "sound/psg/psg6.bin"
PSG5: binclude "sound/psg/psg5.bin"
PSG7: binclude "sound/psg/psg7.bin"
PSG8: binclude "sound/psg/psg8.bin"
PSG9: binclude "sound/psg/psg9.bin"
; ---------------------------------------------------------------------------
; New tempos for songs during speed shoes
; ---------------------------------------------------------------------------
; DANGER! several songs will use the first few bytes of MusicIndex as their main
; tempos while speed shoes are active. If you don't want that, you should add
; their "correct" sped-up main tempos to the list.
; byte_71A94:
SpeedUpIndex:
dc.b 7 ; GHZ
dc.b $72 ; LZ
dc.b $73 ; MZ
dc.b $26 ; SLZ
dc.b $15 ; SYZ
dc.b 8 ; SBZ
dc.b $FF ; Invincibility
dc.b 5 ; Extra Life
;dc.b ? ; Special Stage
;dc.b ? ; Title Screen
;dc.b ? ; Ending
;dc.b ? ; Boss
;dc.b ? ; FZ
;dc.b ? ; Sonic Got Through
;dc.b ? ; Game Over
;dc.b ? ; Continue Screen
;dc.b ? ; Credits
;dc.b ? ; Drowning
;dc.b ? ; Get Emerald
; ---------------------------------------------------------------------------
; Music Pointers
; ---------------------------------------------------------------------------
MusicIndex:
ptr_mus81: dc.l Music81
ptr_mus82: dc.l Music82
ptr_mus83: dc.l Music83
ptr_mus84: dc.l Music84
ptr_mus85: dc.l Music85
ptr_mus86: dc.l Music86
ptr_mus87: dc.l Music87
ptr_mus88: dc.l Music88
ptr_mus89: dc.l Music89
ptr_mus8A: dc.l Music8A
ptr_mus8B: dc.l Music8B
ptr_mus8C: dc.l Music8C
ptr_mus8D: dc.l Music8D
ptr_mus8E: dc.l Music8E
ptr_mus8F: dc.l Music8F
ptr_mus90: dc.l Music90
ptr_mus91: dc.l Music91
ptr_mus92: dc.l Music92
ptr_mus93: dc.l Music93
ptr_mus94: dc.l Music94
ptr_musend
; ---------------------------------------------------------------------------
; Priority of sound. New music or SFX must have a priority higher than or equal
; to what is stored in SMPS_RAM.v_sndprio or it won't play. If bit 7 of new priority is
; set ($80 and up), the new music or SFX will not set its priority -- meaning
; any music or SFX can override it (as long as it can override whatever was
; playing before). Usually, SFX will only override SFX, special SFX ($D0-$DF)
; will only override special SFX and music will only override music.
; ---------------------------------------------------------------------------
; SoundTypes:
SoundPriorities:
dc.b $90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90 ; $81
dc.b $90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90,$90 ; $90
dc.b $80,$70,$70,$70,$70,$70,$70,$70,$70,$70,$68,$70,$70,$70,$60,$70 ; $A0
dc.b $70,$60,$70,$60,$70,$70,$70,$70,$70,$70,$70,$70,$70,$70,$70,$7F ; $B0
dc.b $60,$70,$70,$70,$70,$70,$70,$70,$70,$70,$70,$70,$70,$70,$70,$70 ; $C0
dc.b $80,$80,$80,$80,$80,$80,$80,$80,$80,$80,$80,$80,$80,$80,$80,$80 ; $D0
dc.b $90,$90,$90,$90,$90 ; $E0
even
; ---------------------------------------------------------------------------
; Subroutine to update music more than once per frame
; (Called by horizontal & vert. interrupts)
; ---------------------------------------------------------------------------
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; sub_71B4C:
UpdateMusic:
stopZ80
nop
nop
nop
; loc_71B5A:
.updateloop:
btst #0,(z80_bus_request).l ; Is the z80 busy?
bne.s .updateloop ; If so, wait
btst #7,(z80_dac_status).l ; Is DAC accepting new samples?
beq.s .driverinput ; Branch if yes
startZ80
nop
nop
nop
nop
nop
bra.s UpdateMusic
; ===========================================================================
; loc_71B82:
.driverinput:
lea (v_snddriver_ram&$FFFFFF).l,a6
clr.b SMPS_RAM.f_voice_selector(a6)
tst.b SMPS_RAM.f_pausemusic(a6) ; is music paused?
bne.w PauseMusic ; if yes, branch
subq.b #1,SMPS_RAM.v_main_tempo_timeout(a6) ; Has main tempo timer expired?
bne.s .skipdelay
jsr TempoWait(pc)
; loc_71B9E:
.skipdelay:
move.b SMPS_RAM.v_fadeout_counter(a6),d0
beq.s .skipfadeout
jsr DoFadeOut(pc)
; loc_71BA8:
.skipfadeout:
tst.b SMPS_RAM.f_fadein_flag(a6)
beq.s .skipfadein
jsr DoFadeIn(pc)
; loc_71BB2:
.skipfadein:
; Sound driver bugfixes
moveq #0,d0
or.b SMPS_RAM.v_soundqueue2(a6),d0 ; Also check SMPS_RAM.v_soundqueue2
or.w SMPS_RAM.v_soundqueue0(a6),d0 ; is a music or sound queued for playing?
; Sound driver bugfixes end
beq.s .nosndinput ; if not, branch
jsr CycleSoundQueue(pc)
; loc_71BBC:
.nosndinput:
cmpi.b #$80,SMPS_RAM.v_sound_id(a6) ; is song queue set for silence (empty)?
beq.s .nonewsound ; If yes, branch
jsr PlaySoundID(pc)
; loc_71BC8:
.nonewsound:
; Spin Dash SFX
tst.b (v_spindashsfx2).w
beq.s .cont
subq.b #1,(v_spindashsfx2).w
.cont:
; Spin Dash SFX end
lea SMPS_RAM.v_music_dac_track(a6),a5
tst.b SMPS_Track.PlaybackControl(a5) ; Is DAC track playing?
bpl.s .dacdone ; Branch if not
jsr DACUpdateTrack(pc)
; loc_71BD4:
.dacdone:
clr.b SMPS_RAM.f_updating_dac(a6)
moveq #SMPS_MUSIC_FM_TRACK_COUNT-1,d7 ; 6 FM tracks
; loc_71BDA:
.bgmfmloop:
adda.w #SMPS_Track.len,a5
tst.b SMPS_Track.PlaybackControl(a5) ; Is track playing?
bpl.s .bgmfmnext ; Branch if not
jsr FMUpdateTrack(pc)
; loc_71BE6:
.bgmfmnext:
dbf d7,.bgmfmloop
moveq #SMPS_MUSIC_PSG_TRACK_COUNT-1,d7 ; 3 PSG tracks
; loc_71BEC:
.bgmpsgloop:
adda.w #SMPS_Track.len,a5
tst.b SMPS_Track.PlaybackControl(a5) ; Is track playing?
bpl.s .bgmpsgnext ; Branch if not
jsr PSGUpdateTrack(pc)
; loc_71BF8:
.bgmpsgnext:
dbf d7,.bgmpsgloop
move.b #$80,SMPS_RAM.f_voice_selector(a6) ; Now at SFX tracks
moveq #SMPS_SFX_FM_TRACK_COUNT-1,d7 ; 3 FM tracks (SFX)
; loc_71C04:
.sfxfmloop:
adda.w #SMPS_Track.len,a5
tst.b SMPS_Track.PlaybackControl(a5) ; Is track playing?
bpl.s .sfxfmnext ; Branch if not
jsr FMUpdateTrack(pc)
; loc_71C10:
.sfxfmnext:
dbf d7,.sfxfmloop
moveq #SMPS_SFX_PSG_TRACK_COUNT-1,d7 ; 3 PSG tracks (SFX)
; loc_71C16:
.sfxpsgloop:
adda.w #SMPS_Track.len,a5
tst.b SMPS_Track.PlaybackControl(a5) ; Is track playing?
bpl.s .sfxpsgnext ; Branch if not
jsr PSGUpdateTrack(pc)
; loc_71C22:
.sfxpsgnext:
dbf d7,.sfxpsgloop
move.b #$40,SMPS_RAM.f_voice_selector(a6) ; Now at special SFX tracks
adda.w #SMPS_Track.len,a5
tst.b SMPS_Track.PlaybackControl(a5) ; Is track playing?
bpl.s .specfmdone ; Branch if not
jsr FMUpdateTrack(pc)
; loc_71C38:
.specfmdone:
adda.w #SMPS_Track.len,a5
tst.b SMPS_Track.PlaybackControl(a5) ; Is track playing
bpl.s DoStartZ80 ; Branch if not
jsr PSGUpdateTrack(pc)
; loc_71C44:
DoStartZ80:
startZ80
rts
; End of function UpdateMusic
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; sub_71C4E: UpdateDAC:
DACUpdateTrack:
subq.b #1,SMPS_Track.DurationTimeout(a5) ; Has DAC sample timeout expired?
bne.s .locret ; Return if not
move.b #$80,SMPS_RAM.f_updating_dac(a6) ; Set flag to indicate this is the DAC
;DACDoNext:
movea.l SMPS_Track.DataPointer(a5),a4 ; DAC track data pointer
; loc_71C5E:
.sampleloop:
moveq #0,d5
move.b (a4)+,d5 ; Get next SMPS unit
cmpi.b #$E0,d5 ; Is it a coord. flag?
blo.s .notcoord ; Branch if not
jsr CoordFlag(pc)
bra.s .sampleloop
; ===========================================================================
; loc_71C6E:
.notcoord:
tst.b d5 ; Is it a sample?
bpl.s .gotduration ; Branch if not (duration)
move.b d5,SMPS_Track.SavedDAC(a5) ; Store new sample
move.b (a4)+,d5 ; Get another byte
bpl.s .gotduration ; Branch if it is a duration
subq.w #1,a4 ; Put byte back
move.b SMPS_Track.SavedDuration(a5),SMPS_Track.DurationTimeout(a5) ; Use last duration
bra.s .gotsampleduration
; ===========================================================================
; loc_71C84:
.gotduration:
jsr SetDuration(pc)
; loc_71C88:
.gotsampleduration:
move.l a4,SMPS_Track.DataPointer(a5) ; Save pointer
btst #2,SMPS_Track.PlaybackControl(a5) ; Is track being overridden?
bne.s .locret ; Return if yes
moveq #0,d0
move.b SMPS_Track.SavedDAC(a5),d0 ; Get sample
cmpi.b #$80,d0 ; Is it a rest?
beq.s .locret ; Return if yes
btst #3,d0 ; Is bit 3 set (samples between $88-$8F)?
bne.s .timpani ; Various timpani
move.b d0,(z80_dac_sample).l
; MPCM_stopZ80 ; ++
; move.b d0, z80_ram+Z_MPCM_CommandInput ; ++ send DAC sample to Mega PCM
; MPCM_startZ80 ; ++
; locret_71CAA:
.locret:
rts
; ===========================================================================
; loc_71CAC:
.timpani:
subi.b #$88,d0 ; Convert into an index
move.b DAC_sample_rate(pc,d0.w),d0
; Warning: this affects the raw pitch of sample $83, meaning it will
; use this value from then on.
move.b d0,(z80_dac_timpani_pitch).l
move.b #$83,(z80_dac_sample).l ; Use timpani
rts
; End of function DACUpdateTrack
; ===========================================================================
; Note: this only defines rates for samples $88-$8D, meaning $8E-$8F are invalid.
; Also, $8C-$8D are so slow you may want to skip them.
; byte_71CC4:
DAC_sample_rate:
dc.b dpcmLoopCounter(9750)
dc.b dpcmLoopCounter(8750)
dc.b dpcmLoopCounter(7150)
dc.b dpcmLoopCounter(7000)
dc.b $FF, $FF
even
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; sub_71CCA:
FMUpdateTrack:
subq.b #1,SMPS_Track.DurationTimeout(a5) ; Update duration timeout
bne.s .notegoing ; Branch if it hasn't expired
bclr #4,SMPS_Track.PlaybackControl(a5) ; Clear 'do not attack next note' bit
jsr FMDoNext(pc)
jsr FMPrepareNote(pc)
bra.w FMNoteOn
; ===========================================================================
; loc_71CE0:
.notegoing:
jsr NoteTimeoutUpdate(pc)
jsr DoModulation(pc)
bra.w FMUpdateFreq
; End of function FMUpdateTrack
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; sub_71CEC:
FMDoNext:
movea.l SMPS_Track.DataPointer(a5),a4 ; Track data pointer
bclr #1,SMPS_Track.PlaybackControl(a5) ; Clear 'track at rest' bit
; loc_71CF4:
.noteloop:
moveq #0,d5
move.b (a4)+,d5 ; Get byte from track
cmpi.b #$E0,d5 ; Is this a coord. flag?
blo.s .gotnote ; Branch if not
jsr CoordFlag(pc)
bra.s .noteloop
; ===========================================================================
; loc_71D04:
.gotnote:
jsr FMNoteOff(pc)
tst.b d5 ; Is this a note?
bpl.s .gotduration ; Branch if not
jsr FMSetFreq(pc)
move.b (a4)+,d5 ; Get another byte
bpl.s .gotduration ; Branch if it is a duration
subq.w #1,a4 ; Otherwise, put it back
bra.w FinishTrackUpdate
; ===========================================================================
; loc_71D1A:
.gotduration:
jsr SetDuration(pc)
bra.w FinishTrackUpdate
; End of function FMDoNext
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; sub_71D22:
FMSetFreq:
subi.b #$80,d5 ; Make it a zero-based index
beq.s TrackSetRest
add.b SMPS_Track.Transpose(a5),d5 ; Add track transposition
andi.w #$7F,d5 ; Clear high byte and sign bit
lsl.w #1,d5
lea FMFrequencies(pc),a0
move.w (a0,d5.w),d6
move.w d6,SMPS_Track.Freq(a5) ; Store new frequency
rts
; End of function FMSetFreq
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; sub_71D40:
SetDuration:
move.b d5,d0
move.b SMPS_Track.TempoDivider(a5),d1 ; Get dividing timing
; loc_71D46:
.multloop:
subq.b #1,d1
beq.s .donemult
add.b d5,d0
bra.s .multloop
; ===========================================================================
; loc_71D4E:
.donemult:
move.b d0,SMPS_Track.SavedDuration(a5) ; Save duration
move.b d0,SMPS_Track.DurationTimeout(a5) ; Save duration timeout
rts
; End of function SetDuration
; ===========================================================================
; loc_71D58:
TrackSetRest:
bset #1,SMPS_Track.PlaybackControl(a5) ; Set 'track at rest' bit
clr.w SMPS_Track.Freq(a5) ; Clear frequency
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; sub_71D60:
FinishTrackUpdate:
move.l a4,SMPS_Track.DataPointer(a5) ; Store new track position
move.b SMPS_Track.SavedDuration(a5),SMPS_Track.DurationTimeout(a5) ; Reset note timeout
btst #4,SMPS_Track.PlaybackControl(a5) ; Is track set to not attack note?
bne.s .locret ; If so, branch
move.b SMPS_Track.NoteTimeoutMaster(a5),SMPS_Track.NoteTimeout(a5) ; Reset note fill timeout
clr.b SMPS_Track.VolEnvIndex(a5) ; Reset PSG volume envelope index (even on FM tracks...)
btst #3,SMPS_Track.PlaybackControl(a5) ; Is modulation on?
beq.s .locret ; If not, return
movea.l SMPS_Track.ModulationPtr(a5),a0 ; Modulation data pointer
move.b (a0)+,SMPS_Track.ModulationWait(a5) ; Reset wait
move.b (a0)+,SMPS_Track.ModulationSpeed(a5) ; Reset speed
move.b (a0)+,SMPS_Track.ModulationDelta(a5) ; Reset delta
move.b (a0)+,d0 ; Get steps
lsr.b #1,d0 ; Halve them
move.b d0,SMPS_Track.ModulationSteps(a5) ; Then store
clr.w SMPS_Track.ModulationVal(a5) ; Reset frequency change
; locret_71D9C:
.locret:
rts
; End of function FinishTrackUpdate
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; sub_71D9E: NoteFillUpdate
NoteTimeoutUpdate:
tst.b SMPS_Track.NoteTimeout(a5) ; Is note fill on?
beq.s .locret
subq.b #1,SMPS_Track.NoteTimeout(a5) ; Update note fill timeout
bne.s .locret ; Return if it hasn't expired
bset #1,SMPS_Track.PlaybackControl(a5) ; Put track at rest
tst.b SMPS_Track.VoiceControl(a5) ; Is this a PSG track?
bmi.w .psgnoteoff ; If yes, branch
jsr FMNoteOff(pc)
addq.w #4,sp ; Do not return to caller
rts
; ===========================================================================
; loc_71DBE:
.psgnoteoff:
jsr PSGNoteOff(pc)
addq.w #4,sp ; Do not return to caller
; locret_71DC4:
.locret:
rts
; End of function NoteTimeoutUpdate
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; sub_71DC6:
DoModulation:
addq.w #4,sp ; Do not return to caller (but see below)
; Bugfix - Fix modulation during rests - ValleyBell
btst #1,(a5) ; Is note playing?
bne.s .locret ; no - return
; Fix End
btst #3,SMPS_Track.PlaybackControl(a5) ; Is modulation active?
beq.s .locret ; Return if not
tst.b SMPS_Track.ModulationWait(a5) ; Has modulation wait expired?
beq.s .waitdone ; If yes, branch
subq.b #1,SMPS_Track.ModulationWait(a5) ; Update wait timeout
rts
; ===========================================================================
; loc_71DDA:
.waitdone:
subq.b #1,SMPS_Track.ModulationSpeed(a5) ; Update speed
beq.s .updatemodulation ; If it expired, want to update modulation
rts
; ===========================================================================
; loc_71DE2:
.updatemodulation:
movea.l SMPS_Track.ModulationPtr(a5),a0 ; Get modulation data
move.b 1(a0),SMPS_Track.ModulationSpeed(a5) ; Restore modulation speed
tst.b SMPS_Track.ModulationSteps(a5) ; Check number of steps
bne.s .calcfreq ; If nonzero, branch
move.b 3(a0),SMPS_Track.ModulationSteps(a5) ; Restore from modulation data
neg.b SMPS_Track.ModulationDelta(a5) ; Negate modulation delta
rts
; ===========================================================================
; loc_71DFE:
.calcfreq:
subq.b #1,SMPS_Track.ModulationSteps(a5) ; Update modulation steps
move.b SMPS_Track.ModulationDelta(a5),d6 ; Get modulation delta
ext.w d6
add.w SMPS_Track.ModulationVal(a5),d6 ; Add cumulative modulation change
move.w d6,SMPS_Track.ModulationVal(a5) ; Store it
add.w SMPS_Track.Freq(a5),d6 ; Add note frequency to it
subq.w #4,sp ; In this case, we want to return to caller after all
; locret_71E16:
.locret:
rts
; End of function DoModulation
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; sub_71E18:
FMPrepareNote:
btst #1,SMPS_Track.PlaybackControl(a5) ; Is track resting?
bne.s locret_71E48 ; Return if so
move.w SMPS_Track.Freq(a5),d6 ; Get current note frequency
beq.s FMSetRest ; Branch if zero
; Bugfix: Fix Modulation Frequency bug on note-on - AURORA☆FIELDS
btst #3,(a5) ; check if modulation is active
beq.s FMUpdateFreq ; if not, branch
add.w SMPS_Track.ModulationVal(a5),d6 ; add modulation frequency to d6
; Bugfix end
; loc_71E24:
FMUpdateFreq:
move.b SMPS_Track.Detune(a5),d0 ; Get detune value
ext.w d0
add.w d0,d6 ; Add note frequency
btst #2,SMPS_Track.PlaybackControl(a5) ; Is track being overridden?
bne.s locret_71E48 ; Return if so
move.w d6,d1
lsr.w #8,d1
move.b #$A4,d0 ; Register for upper 6 bits of frequency
jsr WriteFMIorII(pc)
move.b d6,d1
move.b #$A0,d0 ; Register for lower 8 bits of frequency
jsr WriteFMIorII(pc) ; (It would be better if this were a jmp)
; locret_71E48:
locret_71E48:
rts
; ===========================================================================
; loc_71E4A:
FMSetRest:
bset #1,SMPS_Track.PlaybackControl(a5) ; Set 'track at rest' bit
rts
; End of function FMPrepareNote
; ===========================================================================
; loc_71E50:
PauseMusic:
bmi.s .unpausemusic ; Branch if music is being unpaused
cmpi.b #2,SMPS_RAM.f_pausemusic(a6)
beq.w .unpausedallfm
move.b #2,SMPS_RAM.f_pausemusic(a6)
moveq #2,d3
move.b #$B4,d0 ; Command to set AMS/FMS/panning
moveq #0,d1 ; No panning, AMS or FMS
; loc_71E6A:
.killpanloop:
jsr WriteFMI(pc)
jsr WriteFMII(pc)
addq.b #1,d0
dbf d3,.killpanloop
moveq #2,d3
moveq #$28,d0 ; Key on/off register
; loc_71E7C:
.noteoffloop:
move.b d3,d1 ; FM1, FM2, FM3
jsr WriteFMI(pc)
addq.b #4,d1 ; FM4, FM5, FM6
jsr WriteFMI(pc)
dbf d3,.noteoffloop
jsr PSGSilenceAll(pc)
bra.w DoStartZ80
; ===========================================================================
; loc_71E94:
.unpausemusic:
clr.b SMPS_RAM.f_pausemusic(a6)
moveq #SMPS_Track.len,d3
lea SMPS_RAM.v_music_fmdac_tracks(a6),a5
moveq #SMPS_MUSIC_FM_DAC_TRACK_COUNT-1,d4 ; 6 FM + 1 DAC tracks
; loc_71EA0:
.bgmfmloop:
btst #7,SMPS_Track.PlaybackControl(a5) ; Is track playing?
beq.s .bgmfmnext ; Branch if not
btst #2,SMPS_Track.PlaybackControl(a5) ; Is track being overridden?
bne.s .bgmfmnext ; Branch if yes
move.b #$B4,d0 ; Command to set AMS/FMS/panning
move.b SMPS_Track.AMSFMSPan(a5),d1 ; Get value from track RAM
jsr WriteFMIorII(pc)
; loc_71EB8:
.bgmfmnext:
adda.w d3,a5
dbf d4,.bgmfmloop
lea SMPS_RAM.v_sfx_fm_tracks(a6),a5
moveq #SMPS_SFX_FM_TRACK_COUNT-1,d4 ; 3 FM tracks (SFX)
; loc_71EC4:
.sfxfmloop:
btst #7,SMPS_Track.PlaybackControl(a5) ; Is track playing?
beq.s .sfxfmnext ; Branch if not
btst #2,SMPS_Track.PlaybackControl(a5) ; Is track being overridden?
bne.s .sfxfmnext ; Branch if yes
move.b #$B4,d0 ; Command to set AMS/FMS/panning
move.b SMPS_Track.AMSFMSPan(a5),d1 ; Get value from track RAM
jsr WriteFMIorII(pc)
; loc_71EDC:
.sfxfmnext:
adda.w d3,a5
dbf d4,.sfxfmloop
lea SMPS_RAM.v_spcsfx_track_ram(a6),a5
btst #7,SMPS_Track.PlaybackControl(a5) ; Is track playing?
beq.s .unpausedallfm ; Branch if not
btst #2,SMPS_Track.PlaybackControl(a5) ; Is track being overridden?
bne.s .unpausedallfm ; Branch if yes
move.b #$B4,d0 ; Command to set AMS/FMS/panning
move.b SMPS_Track.AMSFMSPan(a5),d1 ; Get value from track RAM
jsr WriteFMIorII(pc)
; loc_71EFE:
.unpausedallfm:
bra.w DoStartZ80
; ---------------------------------------------------------------------------
; Subroutine to play a sound or music track
; ---------------------------------------------------------------------------
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; Sound_Play:
CycleSoundQueue:
movea.l (Go_SoundPriorities).l,a0
lea SMPS_RAM.v_soundqueue0(a6),a1 ; load music track number
_move.b SMPS_RAM.v_sndprio(a6),d3 ; Get priority of currently playing SFX
moveq #SMPS_RAM.v_soundqueue_end-SMPS_RAM.v_soundqueue_start-1,d4
; loc_71F12:
.inputloop:
move.b (a1),d0 ; move track number to d0
move.b d0,d1
clr.b (a1)+ ; Clear entry
subi.b #bgm__First,d0 ; Make it into 0-based index
bcs.s .nextinput ; If negative (i.e., it was $80 or lower), branch
cmpi.b #$80,SMPS_RAM.v_sound_id(a6) ; Is SMPS_RAM.v_sound_id a $80 (silence/empty)?
beq.s .havesound ; If yes, branch
move.b d1,SMPS_RAM.v_soundqueue0(a6) ; Put sound into SMPS_RAM.v_soundqueue0
bra.s .nextinput
; ===========================================================================
; loc_71F2C:
.havesound:
andi.w #$7F,d0 ; Clear high byte and sign bit
move.b (a0,d0.w),d2 ; Get sound type
cmp.b d3,d2 ; Is it a lower priority sound?
blo.s .nextinput ; Branch if yes
move.b d2,d3 ; Store new priority
move.b d1,SMPS_RAM.v_sound_id(a6) ; Queue sound for play
; loc_71F3E:
.nextinput:
dbf d4,.inputloop
tst.b d3 ; We don't want to change sound priority if it is negative
bmi.s .locret
_move.b d3,SMPS_RAM.v_sndprio(a6) ; Set new sound priority
; locret_71F4A:
.locret:
rts
; End of function CycleSoundQueue
; ||||||||||||||| S U B R O U T I N E |||||||||||||||||||||||||||||||||||||||
; Sound_ChkValue:
PlaySoundID:
moveq #0,d7
move.b SMPS_RAM.v_sound_id(a6),d7
beq.w StopAllSound ; if 0, stop all sounds
bpl.s .locret ; If >= 0 and < $80, return (not a valid sound, bgm or command)
move.b #$80,SMPS_RAM.v_sound_id(a6) ; reset music flag
; Music
cmpi.b #bgm__Last,d7 ; Is this music ($81-$93)? -- Sound driver bugfixes: Playing sounds $94-$9F will cause a crash!
bls.w Sound_PlayBGM ; Branch and play if yes
cmpi.b #sfx__First,d7 ; Is this after music but before sfx? ($94-$9F)
blo.w .locret ; Return if yes. Playing sounds $94-$9F will cause a crash!
; SFX
cmpi.b #sfx__Last,d7 ; Is this sfx? ($A0-$CF)?
bls.w Sound_PlaySFX ; Branch and play if yes
cmpi.b #spec__First,d7 ; Is this after sfx but before special sfx?
blo.w .locret ; Return if yes
; Special SFX
cmpi.b #sfx_Waterfall,d7 ; Is this special sfx?
bcs.w Sound_PlaySpecial ; Branch and play if yes
cmpi.b #spec__Last,d7 ; Is this other new special sfx?
ble.w Sound_SpecialSFX ; Branch and play if yes
; Sound Commands
cmpi.b #flg__Last,d7 ; Is this a command flag?
bls.s Sound_Commands ; Branch if yes
; locret_71F8C:
.locret:
rts
; ===========================================================================
; Sound_E0toE4:
Sound_Commands:
subi.b #flg__First,d7
lsl.w #2,d7
jmp Sound_ExIndex(pc,d7.w)
; ===========================================================================
Sound_ExIndex:
ptr_flgE0: bra.w FadeOutMusic
ptr_flgE1: bra.w PlaySegaSound
ptr_flgE2: bra.w SpeedUpMusic
ptr_flgE3: bra.w SlowDownMusic
ptr_flgE4: bra.w StopAllSound
ptr_flgend
; ===========================================================================
; ---------------------------------------------------------------------------
; Play "Say-gaa" PCM sound
; ---------------------------------------------------------------------------
; Sound_E1: PlaySega:
PlaySegaSound:
; ValleyBell Panning Reset Fix
move.b #$B6,d0 ; Register: FM3/6 Panning
move.b #$C0,d1 ; Value: Enable both channels
jsr WriteFMII(pc) ; Write to YM2612 Port 1 (for FM6) [sub_72764]
; Fix end
; Puto Sega Sound Fix
lea (SegaPCM).l,a2 ; Load the SEGA PCM sample into a2. It's important that we use a2 since a0 and a1 are going to be used up ahead when reading the joypad ports
move.l #$6978,d3 ; Load the size of the SEGA PCM sample into d3
move.b #$2A,(ym2612_a0).l ; $A04000 = $2A -> Write to DAC channel
PlayPCM_Loop:
move.b (a2)+,(ym2612_d0).l ; Write the PCM data (contained in a2) to $A04001 (YM2612 register D0)
move.w #$3,d0 ; Write the pitch ($3 in this case) to d0
dbf d0,* ; Decrement d0; jump to itself if not 0. (for pitch control, avoids playing the sample too fast)
sub.l #1,d3 ; Subtract 1 from the PCM sample size
beq.s return_PlayPCM ; If d3 = 0, we finished playing the PCM sample, so stop playing, leave this loop, and unfreeze the 68K
lea (v_jpadhold1).w,a0 ; address where JoyPad states are written
lea (ym2612_d1).l,a1 ; address where JoyPad states are read from
jsr (ReadJoypads).w ; Read only the first joypad port. It's important that we do NOT do the two ports, we don't have the cycles for that
btst #bitStart,(v_jpadhold1).w ; Check for Start button
bne.s return_PlayPCM ; If start is pressed, stop playing, leave this loop, and unfreeze the 68K
bra.s PlayPCM_Loop ; Otherwise, continue playing PCM sample
return_PlayPCM:
addq.w #4,sp
rts
; ===========================================================================
; ---------------------------------------------------------------------------
; Play music track $81-$9F
; ---------------------------------------------------------------------------
; Sound_81to9F:
Sound_PlayBGM:
cmpi.b #bgm_ExtraLife,d7 ; is the "extra life" music to be played?
bne.s .bgmnot1up ; if not, branch
tst.b SMPS_RAM.f_1up_playing(a6) ; Is a 1-up music playing?
bne.w .locdblret ; if yes, branch
lea SMPS_RAM.v_music_track_ram(a6),a5
moveq #SMPS_MUSIC_TRACK_COUNT-1,d0 ; 1 DAC + 6 FM + 3 PSG tracks
; loc_71FE6:
.clearsfxloop:
bclr #2,SMPS_Track.PlaybackControl(a5) ; Clear 'SFX is overriding' bit
adda.w #SMPS_Track.len,a5
dbf d0,.clearsfxloop
lea SMPS_RAM.v_sfx_track_ram(a6),a5
moveq #SMPS_SFX_TRACK_COUNT-1,d0 ; 3 FM + 3 PSG tracks (SFX)
; loc_71FF8:
.cleartrackplayloop:
bclr #7,SMPS_Track.PlaybackControl(a5) ; Clear 'track is playing' bit
adda.w #SMPS_Track.len,a5
dbf d0,.cleartrackplayloop
_clr.b SMPS_RAM.v_sndprio(a6) ; Clear priority
movea.l a6,a0
lea SMPS_RAM.v_1up_ram_copy(a6),a1
move.w #((SMPS_RAM.v_1up_ram_end-SMPS_RAM.v_1up_ram)/4)-1,d0 ; Backup $220 bytes: all variables and music track data
; loc_72012:
.backupramloop:
move.l (a0)+,(a1)+
dbf d0,.backupramloop
move.b #$80,SMPS_RAM.f_1up_playing(a6)
_clr.b SMPS_RAM.v_sndprio(a6) ; Clear priority again (?)
bra.s .bgm_loadMusic
; ===========================================================================
; loc_72024:
.bgmnot1up:
clr.b SMPS_RAM.f_1up_playing(a6)
clr.b SMPS_RAM.v_fadein_counter(a6)
; loc_7202C:
.bgm_loadMusic:
jsr InitMusicPlayback(pc)
movea.l (Go_SpeedUpIndex).l,a4
subi.b #bgm__First,d7
move.b (a4,d7.w),SMPS_RAM.v_speeduptempo(a6)
movea.l (Go_MusicIndex).l,a4
lsl.w #2,d7
movea.l (a4,d7.w),a4 ; a4 now points to (uncompressed) song data
moveq #0,d0
move.w (a4),d0 ; load voice pointer
add.l a4,d0 ; It is a relative pointer
move.l d0,SMPS_RAM.v_voice_ptr(a6)
move.b 5(a4),d0 ; load tempo
move.b d0,SMPS_RAM.v_tempo_mod(a6)
tst.b SMPS_RAM.f_speedup(a6)
beq.s .nospeedshoes
move.b SMPS_RAM.v_speeduptempo(a6),d0
; loc_72068:
.nospeedshoes:
move.b d0,SMPS_RAM.v_main_tempo(a6)
move.b d0,SMPS_RAM.v_main_tempo_timeout(a6)
moveq #0,d1
movea.l a4,a3
addq.w #6,a4 ; Point past header
; Valleybell fix for 0 FM/DAC channels
move.b 4(a3),d4 ; load tempo dividing timing [!]
moveq #SMPS_Track.len,d6 ; [!]
move.b #1,d5 ; Note duration for first "note" [!]
; fix end
moveq #0,d7
move.b 2(a3),d7 ; load number of FM+DAC tracks
beq.w .bgm_fmdone ; branch if zero
subq.b #1,d7
move.b #$C0,d1 ; Default AMS+FMS+Panning
lea SMPS_RAM.v_music_fmdac_tracks(a6),a1
lea FMDACInitBytes(pc),a2
; loc_72098:
.bgm_fmloadloop:
bset #7,SMPS_Track.PlaybackControl(a1) ; Initial playback control: set 'track playing' bit
move.b (a2)+,SMPS_Track.VoiceControl(a1) ; Voice control bits
move.b d4,SMPS_Track.TempoDivider(a1)
move.b d6,SMPS_Track.StackPointer(a1) ; set "gosub" (coord flag $F8) stack init value
move.b d1,SMPS_Track.AMSFMSPan(a1) ; Set AMS/FMS/Panning
move.b d5,SMPS_Track.DurationTimeout(a1) ; Set duration of first "note"
moveq #0,d0
move.w (a4)+,d0 ; load DAC/FM pointer
add.l a3,d0 ; Relative pointer
move.l d0,SMPS_Track.DataPointer(a1) ; Store track pointer
move.w (a4)+,SMPS_Track.Transpose(a1) ; load FM channel modifier
adda.w d6,a1
dbf d7,.bgm_fmloadloop
cmpi.b #7,2(a3) ; Are 7 FM tracks defined?
bne.s .silencefm6
moveq #$2B,d0 ; DAC enable/disable register
moveq #0,d1 ; Disable DAC
jsr WriteFMI(pc)
bra.w .bgm_fmdone
; ===========================================================================
; loc_720D8:
.silencefm6:
moveq #$28,d0 ; Key on/off register
moveq #6,d1 ; Note off on all operators of channel 6
jsr WriteFMI(pc)
move.b #$42,d0 ; TL for operator 1 of FM6
moveq #$7F,d1 ; Total silence
jsr WriteFMII(pc)
move.b #$4A,d0 ; TL for operator 3 of FM6
moveq #$7F,d1 ; Total silence
jsr WriteFMII(pc)
move.b #$46,d0 ; TL for operator 2 of FM6
moveq #$7F,d1 ; Total silence
jsr WriteFMII(pc)
move.b #$4E,d0 ; TL for operator 4 of FM6
moveq #$7F,d1 ; Total silence
jsr WriteFMII(pc)
move.b #$B6,d0 ; AMS/FMS/panning of FM6
move.b #$C0,d1 ; Stereo
jsr WriteFMII(pc)
; loc_72114:
.bgm_fmdone:
moveq #0,d7
move.b 3(a3),d7 ; Load number of PSG tracks
beq.s .bgm_psgdone ; branch if zero
subq.b #1,d7
lea SMPS_RAM.v_music_psg_tracks(a6),a1
lea PSGInitBytes(pc),a2
; loc_72126:
.bgm_psgloadloop:
bset #7,SMPS_Track.PlaybackControl(a1) ; Initial playback control: set 'track playing' bit
move.b (a2)+,SMPS_Track.VoiceControl(a1) ; Voice control bits
move.b d4,SMPS_Track.TempoDivider(a1)
move.b d6,SMPS_Track.StackPointer(a1) ; set "gosub" (coord flag $F8) stack init value
move.b d5,SMPS_Track.DurationTimeout(a1) ; Set duration of first "note"
moveq #0,d0
move.w (a4)+,d0 ; load PSG channel pointer
add.l a3,d0 ; Relative pointer
move.l d0,SMPS_Track.DataPointer(a1) ; Store track pointer
move.w (a4)+,SMPS_Track.Transpose(a1) ; load PSG modifier
move.b (a4)+,d0 ; load redundant byte
move.b (a4)+,SMPS_Track.VoiceIndex(a1) ; Initial PSG tone
adda.w d6,a1
dbf d7,.bgm_psgloadloop
; loc_72154:
.bgm_psgdone:
lea SMPS_RAM.v_sfx_track_ram(a6),a1
moveq #SMPS_SFX_TRACK_COUNT-1,d7 ; 6 SFX tracks
; loc_7215A:
.sfxstoploop:
tst.b SMPS_Track.PlaybackControl(a1) ; Is SFX playing?
bpl.w .sfxnext ; Branch if not
moveq #0,d0
move.b SMPS_Track.VoiceControl(a1),d0 ; Get voice control bits
bmi.s .sfxpsgchannel ; Branch if this is a PSG channel
subq.b #2,d0 ; SFX can't have FM1 or FM2
lsl.b #2,d0 ; Convert to index
bra.s .gotchannelindex
; ===========================================================================
; loc_7216E:
.sfxpsgchannel:
lsr.b #3,d0 ; Convert to index
; loc_72170:
.gotchannelindex:
lea SFX_BGMChannelRAM(pc),a0
movea.l (a0,d0.w),a0
bset #2,SMPS_Track.PlaybackControl(a0) ; Set 'SFX is overriding' bit
; loc_7217C:
.sfxnext:
adda.w d6,a1
dbf d7,.sfxstoploop
tst.w SMPS_RAM.v_spcsfx_fm4_track.PlaybackControl(a6) ; Is special SFX being played?
bpl.s .checkspecialpsg ; Branch if not
bset #2,SMPS_RAM.v_music_fm4_track.PlaybackControl(a6) ; Set 'SFX is overriding' bit
; loc_7218E:
.checkspecialpsg:
tst.w SMPS_RAM.v_spcsfx_psg3_track.PlaybackControl(a6) ; Is special SFX being played?
bpl.s .sendfmnoteoff ; Branch if not
bset #2,SMPS_RAM.v_music_psg3_track.PlaybackControl(a6) ; Set 'SFX is overriding' bit
; loc_7219A:
.sendfmnoteoff:
lea SMPS_RAM.v_music_fm_tracks(a6),a5
moveq #SMPS_MUSIC_FM_TRACK_COUNT-1,d4 ; 6 FM tracks
; loc_721A0:
.fmnoteoffloop:
jsr FMNoteOff(pc)
adda.w d6,a5
dbf d4,.fmnoteoffloop ; run all FM tracks
moveq #SMPS_MUSIC_PSG_TRACK_COUNT-1,d4 ; 3 PSG tracks
; loc_721AC:
.psgnoteoffloop:
jsr PSGNoteOff(pc)
adda.w d6,a5
dbf d4,.psgnoteoffloop ; run all PSG tracks
; loc_721B6:
.locdblret:
addq.w #4,sp ; Tamper with return value to not return to caller
rts
; ===========================================================================
; byte_721BA:
FMDACInitBytes: dc.b 6, 0, 1, 2, 4, 5, 6 ; first byte is for DAC; then notice the 0, 1, 2 then 4, 5, 6; this is the gap between parts I and II for YM2612 port writes
even
; byte_721C2:
PSGInitBytes: dc.b $80, $A0, $C0 ; Specifically, these configure writes to the PSG port for each channel
even
; ===========================================================================
; ===========================================================================
; ---------------------------------------------------------------------------
; Add more sound effects between $D1 onwards
; ---------------------------------------------------------------------------
; Sound_D1_onwards:
Sound_SpecialSFX:
tst.b SMPS_RAM.f_1up_playing(a6)
bne.w Sound_ClearPriority
tst.b SMPS_RAM.v_fadeout_counter(a6)
bne.w Sound_ClearPriority
tst.b SMPS_RAM.f_fadein_flag(a6)
bne.w Sound_ClearPriority
clr.b (v_spindashsfx1).w
cmp.b #sfx_SpinDash,d7 ; is this the Spin Dash sound?
bne.s .cont3 ; if not, branch
move.w d0,-(sp)
move.b (v_spindashsfx3).w,d0 ; store extra frequency
tst.b (v_spindashsfx2).w ; is the Spin Dash timer active?