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[Refactor] Basic source code organization
2020-05-31 04:23:06 +01:00
;---------------------------------------------------------------------
[Refactor] Fully building - Font data now aligned properly in memory
2020-06-15 06:19:36 +01:00
; Music.asm
[Refactor] Basic source code organization
2020-05-31 04:23:06 +01:00
; 8.20.00 by Abe Pralle
;---------------------------------------------------------------------
[Refactor] Fully building - Font data now aligned properly in memory
2020-06-15 06:19:36 +01:00
INCLUDE "Source/Defs.inc"
[Refactor] Basic source code organization
2020-05-31 04:23:06 +01:00
;Routines
;--------------
; InitMusic
; PlayMusic
SECTION "MusicHome",ROM0
;---------------------------------------------------------------------
; Routine: IsCurMusic
; Arguments: a - bank of gbm data
; hl - address of compiled gbm music
; Alters: af
; Returns: a - 1 if same music is playing, 0 if not
; zflag - or a
; Description: Initializes a new piece of music *unless* it is
; already playing in which case it leaves it alone.
;---------------------------------------------------------------------
IsCurMusic::
push bc
ld b,a
ld a,[musicBank]
cp b
jr nz,.different
ld a,[musicAddress]
cp l
jr nz,.different
ld a,[musicAddress+1]
cp h
jr nz,.different
.same
pop bc
ld a,1
or a
ret
.different
pop bc
xor a
ret
;---------------------------------------------------------------------
; Routine: InitMusic
; Arguments: a - bank of gbm data
; hl - address of compiled gbm music
; Alters: af
; Description: Initializes a new piece of music *unless* it is
; already playing in which case it leaves it alone.
;---------------------------------------------------------------------
InitMusic::
push bc
push de
push hl
push af
ld b,a
ld a,[musicBank]
cp b
jr nz,.newMusic
ld a,[musicAddress]
cp l
jr nz,.newMusic
ld a,[musicAddress+1]
cp h
jr nz,.newMusic
pop af
jp .done ;currently playing this one
.newMusic
pop af
di
ld [musicBank],a
xor a
ld [musicEnabled],a
ei
ld a,l
ld [musicAddress],a
ld a,h
ld [musicAddress+1],a
PUSHROM
ld a,[musicBank]
call SetActiveROM
;parse header
inc hl ;skip version
ld a,[hl+] ;notes per second
ld [musicNoteCountdownInit],a
ld [musicNoteCountdown],a
ld de,6
add hl,de
ld bc,musicTrack1Pos
call .getTrackOffset
ld bc,musicTrack2Pos
call .getTrackOffset
ld bc,musicTrack3Pos
call .getTrackOffset
ld bc,musicTrack4Pos
call .getTrackOffset
ld a,BANK(instrumentDefaults)
call SetActiveROM
ld c,33
ld de,musicInstrument1
ld hl,instrumentDefaults
.copyDefaultInstruments
ld a,[hl+]
ld [de],a
inc de
dec c
jr nz,.copyDefaultInstruments
;actually set default instruments
ld hl,musicInstrument1
ld de,$ff10
ld bc,4
xor a
call MemCopy
ld hl,musicInstrument2
ld de,$ff16
ld bc,3
call MemCopy
ld hl,musicInstrument3
ld de,$ff31
call MemCopy
ld hl,musicInstrument4
ld de,$ff20
call MemCopy
;disable sound
xor a
ldio [$ff26],a
ldio [$ff12],a ;zero envelope all instruments
ldio [$ff17],a
ldio [$ff1c],a
ldio [$ff21],a
;ldio [$ff14],a ;turn off instruments
;ldio [$ff19],a
;ldio [$ff1e],a
;ldio [$ff23],a
;enable sound
ld a,$80
ldio [$ff26],a ;master
ld a,$ff
ldio [$ff24],a ;volume
ldio [$ff25],a ;sound output terminals
;ld a,[musicInstrument1]
;ldio [$ff10],a
;ld a,[musicInstrument1+1]
;ldio [$ff11],a
;ld a,[musicInstrument2]
;ldio [$ff16],a
;ld a,[musicInstrument2]
;ldio [$ff16],a
;setup waveform data
ld de,$ff30
ld hl,musicWaveform
ld bc,16
call MemCopy
xor a
POPROM
;initialize music stacks
ld a,32
ld hl,musicStackL1
ld [hl+],a
ld a,64
ld [hl+],a
ld a,96
ld [hl+],a
ld a,128
ld [hl+],a
.done
ld a,%11111
ldio [musicEnabled],a
pop hl
pop de
pop bc
ret
.getTrackOffset
ld a,[hl+]
ld e,a
ld a,[hl+]
ld d,a
push hl
add hl,de
ld a,l
ld [bc],a
inc bc
ld a,h
ld [bc],a
pop hl
ret
;---------------------------------------------------------------------
; Routine: StopMusic
; Arguments: None.
; Alters: af
; Description: Halts the music
;---------------------------------------------------------------------
StopMusic::
xor a
ldio [musicEnabled],a
ret
;---------------------------------------------------------------------
; Routine: PlayMusic
; Arguments: None.
; Alters: af
; Description: Plays the next note for each voice. Should only be
; called after [musicNoteCountdown] has reached zero
; (being decremented 60 times per second).
;---------------------------------------------------------------------
PlayMusic::
push bc
push de
push hl
;save the current RAM bank in use
ldio a,[$ff70]
push af
ld a,MUSICBANK
ldio [$ff70],a
PUSHROM
ld hl,musicBank
ld a,[hl+]
call SetActiveROM
ld a,[hl+] ;countdown init
ld [hl+],a ;reset cur countdown
;decrement sound effect override counters
push hl
xor a
ld hl,musicOverride1
cp [hl]
jr z,.skipOverride1
dec [hl]
.skipOverride1
inc hl
cp [hl]
jr z,.skipOverride4
dec [hl]
.skipOverride4
pop hl
ld a,[musicStackL1]
ld [curTrackStackL],a
call .playTrack
ld a,[curTrackStackL]
ld [musicStackL1],a
.playTrack2
ld a,[musicStackL2]
ld [curTrackStackL],a
call .playTrack
ld a,[curTrackStackL]
ld [musicStackL2],a
.playTrack3
ld a,[musicStackL3]
ld [curTrackStackL],a
call .playTrack
ld a,[curTrackStackL]
ld [musicStackL3],a
.playTrack4
ld a,[musicStackL4]
ld [curTrackStackL],a
call .playTrack
ld a,[curTrackStackL]
ld [musicStackL4],a
.afterPlayTrack4
POPROM
;restore RAM bank
pop af
ldio [$ff70],a
pop hl
pop de
pop bc
ret
.playTrack
;hl - address of pc for current track
push hl
ld a,[hl+] ;set the pc
ld e,a
ld a,[hl+]
ld d,a
;ld a,d
;cp $ff
;jr nz,.okay
;ld b,b
;.okay
call ExecuteByteCode
pop hl
;save new pc for this track
ld a,e
ld [hl+],a
ld a,d
ld [hl+],a
ret
ExecuteByteCode:
ld a,[de] ;get a bytecode
inc de
or a ;nop?
ret z
ld b,a
and $f0
jr nz,.check1xTo8x
ld a,b
bit 3,a
jr nz,.check08To0f
cp 2
jp z,.return
cp 4
jp z,.note1
cp 5
jp z,.note2
cp 6
jp z,.note3
cp 7
jp z,.note4
.error02To07 jr .error02To07
.check08To0f
cp 8
jp z,.hold1
cp 9
jp z,.hold2
cp $0a
jp z,.hold3
cp $0b
jp z,.hold4
cp $0c
jp z,.instr1
cp $0d
jp z,.instr2
cp $0e
jp z,.instr3
cp $0f
jp z,.instr4
.error08To0f jr .error08To0f
.check1xTo8x
cp $10
jp z,.setDec
cp $20
jp z,.setReg
cp $30
jp z,.decReg
cp $40
jp z,.cmpDec
cp $50
jp z,.cmpReg
cp $60
jp z,.jump
cp $70
jp z,.call
cp $80
jp z,.repeat
.error1xTo8x jr .error1xTo8x
.return
;pop return address off the current stack & execute another
;command
ld h,((musicStack>>8)&$ff)
ld a,[curTrackStackL]
ld l,a
ld a,[hl+]
ld e,a
ld a,[hl+]
ld d,a
ld a,l
ld [curTrackStackL],a
jp ExecuteByteCode
.hold1
ld a,[de]
inc de
ld [musicInstrument1+2],a
jr .note1
.hold2 ld a,[de]
inc de
ld [musicInstrument2+1],a
jr .note2
.hold3 ld a,[de]
inc de
ld [musicInstrument3],a
jr .note3
.hold4 ld a,[de]
inc de
ld [musicInstrument4+1],a
jr .note4
.note1
ld hl,musicInstrument1+3
call .noteCommon
.repeat1
ldio a,[musicEnabled]
and %00001
ret z
ld hl,musicInstrument1
jp PlaySoundChannel1
.note2
ld hl,musicInstrument2+2
call .noteCommon
.repeat2
ldio a,[musicEnabled]
and %00010
ret z
ld hl,musicInstrument2
jp PlaySoundChannel2
.note3
ld hl,musicInstrument3+2
call .noteCommon
.repeat3
ldio a,[musicEnabled]
and %00100
ret z
ld hl,musicInstrument3
jp PlaySoundChannel3
.note4
ld hl,musicInstrument4
call .noteCommon
call .noteCommon
.repeat4
ldio a,[musicEnabled]
and %01000
ret z
ld hl,musicInstrument4
jp PlaySoundChannel4
.noteCommon
ld a,[de]
inc de
ld [hl+],a
ld a,[de]
inc de
ld [hl+],a
ret
.instr1
ld hl,musicInstrument1
ld c,3
jp .instrCommon
.instr2
ld hl,musicInstrument2
ld c,2
jp .instrCommon
.instr3
ld hl,musicInstrument3
ld a,[de]
inc de
ld [hl+],a
ld a,[de]
inc de
ld [hl+],a
ld hl,musicWaveform
ld c,16
jp .instrCommon
.instr4
ld hl,musicInstrument4
ld c,4
jp .instrCommon
.instrCommon
ld a,[de]
inc de
ld [hl+],a
dec c
jr nz,.instrCommon
jp ExecuteByteCode
.setDec
ld b,b
ld a,b
call .setHLToReg
ld a,[de]
inc de
ld [hl],a
jp ExecuteByteCode
.setReg
ld b,b
ld a,[de]
inc de
call .setHLToReg
ld c,[hl]
ld a,b
call .setHLToReg
ld [hl],a
jp ExecuteByteCode
.decReg
;ld a,b
;call .setHLToReg
;dec [hl]
;TODO
jp ExecuteByteCode
.cmpDec
ld b,a ;which register?
and $f
add (musicRegisters & $ff)
ld l,a
ld h,((musicRegisters>>8) & $ff)
ld a,[de]
cp [hl]
call nz,.nonZeroResult
call z,.zeroResult
.cmpReg
;TODO
inc de
jp ExecuteByteCode
.nonZeroResult
ld a,0
ld [musicRegisters+15],a
ret
.zeroResult
ld a,1
ld [musicRegisters+15],a
ret
.setHLToReg
and $0f
add (musicRegisters & $ff)
ld h,((musicRegisters>>8) & $ff)
ld l,a
ret
.jump
ld a,[de] ;hl = offset to new address
inc de
ld l,a
ld a,[de]
inc de
ld h,a
ld a,b
and $7
cp 6
jr z,.jumpAlways
;assume cc=eq
ld a,[musicRegisters+15]
or a
jr z,.afterJump ;not eq
.jumpAlways
add hl,de
ld d,h
ld e,l
.afterJump
jp ExecuteByteCode
.call ;save return address on current music stack
ld h,((musicStack>>8)&$ff)
ld a,[curTrackStackL]
sub 2
ld [curTrackStackL],a
ld l,a
ld a,e
add 2
ld [hl+],a
ld a,d
adc 0
ld [hl-],a
ld b,6 ;cc=jump always
jr .jump
.repeat
ld a,b
and $0f
jp z,.repeat1
cp 1
jp z,.repeat2
cp 2
jp z,.repeat3
cp 3
jp z,.repeat4
.error8x jr .error8x
;---------------------------------------------------------------------
SECTION "MusicData1",ROMX
;---------------------------------------------------------------------
instrumentDefaults:
.instrument1
DB $07,$80,$f1,$43,$85
.instrument2
DB $80,$c2,$02,$86
.instrument3
DB $cf,$20,$00,$c5
.instrument4
DB $00,$f0,$00,$c0
.waveform
DB $dd,$dd,$dd,$dd,$dd,$dd,$dd,$dd
DB $00,$00,$00,$00,$00,$00,$00,$00
alarm_gbm::
INCBIN "Data/Music/alarm.gbm.bin"
intro_cinema_gbm::
INCBIN "Data/Music/intro_cinema.gbm.bin"
bs_gbm::
INCBIN "Data/Music/jazzy.gbm.bin"
lady_flower_gbm::
INCBIN "Data/Music/lady_flower.gbm.bin"
main_in_game_gbm::
INCBIN "Data/Music/main_in_game.gbm.bin"
haiku_gbm::
INCBIN "Data/Music/maybe_haiku.gbm.bin"
;---------------------------------------------------------------------
SECTION "MusicData2",ROMX
;---------------------------------------------------------------------
moon_base_ba_gbm::
INCBIN "Data/Music/moon_base_ba.gbm.bin"
moon_base_haiku_gbm::
INCBIN "Data/Music/moon_base_haiku.gbm.bin"
;shroom_gbm::
;INCBIN "Data/Music/shroom.gbm.bin"
cowboy_gbm::
INCBIN "Data/Music/cowboy.gbm.bin"
frosty_gbm::
INCBIN "Data/Music/frosty.gbm.bin"
fgbwar_gbm::
INCBIN "Data/Music/fgbwar.gbm.bin"
wedding_gbm::
INCBIN "Data/Music/wedding.gbm.bin"
takeoff_gbm::
INCBIN "Data/Music/takeoff.gbm.bin"
;---------------------------------------------------------------------
SECTION "MusicData3",ROMX
;---------------------------------------------------------------------
spaceish_gbm::
INCBIN "Data/Music/spaceish.gbm.bin"
beehive_gbm::
INCBIN "Data/Music/beehive.gbm.bin"
hoedown_gbm::
INCBIN "Data/Music/hoedown.gbm.bin"
death_gbm::
INCBIN "Data/Music/death.gbm.bin"
;---------------------------------------------------------------------
SECTION "MusicData4",ROMX
;---------------------------------------------------------------------
jungle_gbm::
INCBIN "Data/Music/jungle.gbm.bin"
mysterious_gbm::
INCBIN "Data/Music/mysterious.gbm.bin"