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justtime.asm
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justtime.asm
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;
;--------------------------------
; BUZZKICK - just on time
; ------------------------------
ORG $6000
;test code
begin
ld hl,musicdata1
call play
ret
;engine code
play
di
ld (drumList+1),hl
ld a,(hl)
inc hl
ld h,(hl)
ld l,a
xor a
ld a, 2
ld (songSpeedComp+1),a
ld (ch1out+1),a
ld (ch2out+1),a
ld a,128
ld (ch1freq+1),a
ld (ch2freq+1),a
ld a,1
ld (ch1delay1+1),a
ld (ch2delay1+1),a
ld a,16
ld (ch1delay2+1),a
ld (ch2delay2+1),a
exx
ld d,a
ld e,a
ld b,a
ld c,a
push hl
exx
readRow
ld c,(hl)
inc hl
bit 7,c
jr z,noSpeed
ld a,(hl)
inc hl
or a
jr nz,noLoop
ld a,(hl)
inc hl
ld h,(hl)
ld l,a
jr readRow
noLoop
ld (songSpeed+1),a
noSpeed
bit 6,c
jr z,noSustain1
ld a,(hl)
inc hl
exx
ld d,a
ld e,a
exx
noSustain1
bit 5,c
jr z,noSustain2
ld a,(hl)
inc hl
exx
ld b,a
ld c,a
exx
noSustain2
bit 4,c
jr z,noNote1
ld a,(hl)
ld d,a
inc hl
or a
jr z,$+4
; ld a,$18
ld a, 2
ld (ch1out+1),a
jr z,noNote1
ld a,d
ld (ch1freq+1),a
srl a
srl a
ld (ch1delay2+1),a
ld a,1
ld (ch1delay1+1),a
exx
ld e,d
exx
noNote1
bit 3,c
jr z,noNote2
ld a,(hl)
ld e,a
inc hl
or a
jr z,$+4
; ld a,$18
ld a, 2
ld (ch2out+1),a
jr z,noNote2
ld a,e
ld (ch2freq+1),a
srl a
srl a
srl a
ld (ch2delay2+1),a
ld a,1
ld (ch2delay1+1),a
exx
ld c,b
exx
noNote2
ld a,c
and 7
jr z,noDrum
playDrum
push hl
add a,a
add a,a
ld c,a
ld b,0
drumList:
ld hl,0
add hl,bc
ld a,(hl) ;length in 256-sample blocks
ld b,a
inc hl
inc hl
add a,a
add a,a
ld (songSpeedComp+1),a
ld a,(hl)
inc hl
ld h,(hl) ;sample data
ld l,a
ld a,1
ld (mask+1),a
ld c,0
loop0
ld a,(hl) ;7
mask:
and 0 ;7
sub 1 ;7
sbc a,a ;4
and 2
out ($ff),a ;11
ld a,(mask+1) ;13
rlc a ;8
ld (mask+1),a ;13
jr nc,$+3 ;7/12
inc hl ;6
jr $+2 ;12
jr $+2 ;12
jr $+2 ;12
jr $+2 ;12
nop ;4
nop ;4
ld a,0 ;7
dec c ;4
jr nz,loop0 ;7/12=168t
djnz loop0
pop hl
noDrum
songSpeed:
ld a,0
ld b,a
songSpeedComp:
sub 0
jr nc,$+3
xor a
ld c,a
ld a,(songSpeedComp+1)
sub b
jr nc,$+3
xor a
ld (songSpeedComp+1),a
ld a,c
or a
jp z,readRow
ld c,a
ld b,64
soundLoop
ld a,3 ;7
dec a ;4
jr nz,$-1 ;7/12=50t
jr $+2 ;12
dec d ;4
jp nz,ch2 ;10
ch1freq:
ld d,0 ;7
ch1delay1:
ld a,0 ;7
dec a ;4
jr nz,$-1 ;7/12
ch1out:
ld a,0 ;7
out ($ff),a ;11
and 2
ch1delay2:
ld a,0 ;7
dec a ;4
jr nz,$-1 ;7/12
out ($ff),a ;11
ch2
ld a,3 ;7
dec a ;4
jr nz,$-1 ;7/12=50t
jr $+2 ;12
dec e ;4
jp nz,loop ;10
ch2freq:
ld e,0 ;7
ch2delay1:
ld a,0 ;7
dec a ;4
jr nz,$-1 ;7/12
ch2out:
ld a,0 ;7
out ($ff),a ;11
ch2delay2:
ld a,0 ;7
dec a ;4
jr nz,$-1 ;7/12
out ($ff),a ;11
loop
dec b ;4
jr nz,soundLoop ;7/12=168t
ld b,64
envelopeDown
exx
dec e
jp nz,noEnv1
ld e,d
ld hl,ch1delay2+1
dec (hl)
jr z,$+5
ld hl,ch1delay1+1
inc (hl)
noEnv1
dec c
jp nz,noEnv2
ld c,b
ld hl,ch2delay2+1
dec (hl)
jr z,$+5
ld hl,ch2delay1+1
inc (hl)
noEnv2
exx
dec c
jp nz,soundLoop
xor a
; in a,($fe)
; cpl
; and $1f
; jp z,readRow
jp readRow
pop hl
exx
ei
ret
musicdata1:
musicData
dw .song,0
.drums
dw 1,.drum0
dw 2,.drum1
dw 2,.drum2
dw 3,.drum3
dw 1,.drum4
dw 1,.drum5
dw 4,.drum6
.drum0
db 0,0,0,0,0,0,128,0,0,204,255,255,191,255,255,255,255,255,31,4,0,0,0,0,0,0,0,0,0,0,0,0
.drum1
db 0,0,252,255,255,0,0,0,64,0,0,224,223,255,255,31,7,0,0,0,0,248,255,255,255,27,1,0,0,0,0,0,192,240,254,191,255,63,0,0,0,0,0,194,199,255,255,191,0,0,0,0,0,0,132,182,247,254,127,6,0,0,0,0
.drum2
db 200,29,3,0,0,0,0,0,24,35,140,253,255,255,255,31,0,0,0,0,0,0,0,0,254,255,255,255,255,191,0,0,0,0,0,0,0,0,224,255,255,255,255,255,255,247,0,0,0,0,0,0,0,0,192,249,255,255,255,255,159,0,0,0
.drum3
db 0,0,252,255,255,3,0,0,0,0,0,0,254,255,255,255,255,9,0,0,0,0,240,255,255,255,111,37,0,0,0,0,0,0,0,220,255,255,255,15,0,0,0,0,0,128,207,255,255,255,20,0,0,0,0,0,128,164,238,255,251,123,19,0,0,0,0,0,0,128,254,207,127,182,1,0,0,0,0,0,0,128,180,105,201,11,0,0,64,0,0,0,0,0,240,242
.drum4
db 0,0,0,0,0,120,0,0,224,15,0,0,192,0,0,0,30,0,0,176,1,0,0,0,0,0,128,0,0,0,0,0
.drum5
db 0,192,15,0,224,7,0,224,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
.drum6
.song
db 249,25,99,99,168,126
db 0
db 0
db 0
db 25,126,0
db 16,0
db 16,126
db 16,0
db 9,126
db 8,0
db 16,126
db 16,0
db 17,126
db 16,0
db 8,126
db 8,0
db 17,126
db 16,0
db 16,126
db 16,0
db 9,126
db 8,0
db 16,126
db 16,0
db 17,126
db 16,0
db 24,168,126
db 0
db 25,168,126
db 0
db 24,189,126
db 0
db 25,168,126
db 0
db 0
db 0
db 25,126,0
db 16,0
db 16,126
db 16,0
db 9,126
db 8,0
db 16,126
db 16,0
db 17,126
db 16,0
db 8,126
db 8,0
db 17,126
db 16,0
db 16,126
db 16,0
db 9,126
db 8,0
db 16,126
db 16,0
db 17,126
db 16,0
db 24,168,126
db 0
db 25,168,126
db 0
db 24,189,126
db 0
db 25,212,159
db 0
db 0
db 0
db 25,159,0
db 16,0
db 16,159
db 16,0
db 9,159
db 8,0
db 16,159
db 16,0
db 17,159
db 16,0
db 8,159
db 8,0
db 17,159
db 16,0
db 16,159
db 16,0
db 9,159
db 8,0
db 16,159
db 16,0
db 17,159
db 16,0
db 24,212,159
db 0
db 25,212,159
db 0
db 24,225,168
db 0
db 25,212,159
db 0
db 0
db 0
db 25,159,0
db 16,0
db 8,159
db 8,0
db 25,212,159
db 0
db 0
db 0
db 25,159,0
db 16,0
db 8,159
db 8,0
db 25,189,141
db 0
db 0
db 0
db 25,141,0
db 16,0
db 8,141
db 8,0
db 25,189,141
db 0
db 0
db 2
db 25,141,0
db 16,0
db 10,141
db 8,0
db 25,168,126
db 0
db 0
db 1
db 26,126,168
db 24,0,0
db 25,126,168
db 8,0
db 24,0,126
db 8,0
db 25,126,168
db 24,0,0
db 26,126,168
db 0
db 24,0,126
db 8,0
db 25,126,168
db 24,0,0
db 24,126,168
db 9,0
db 26,0,126
db 8,0
db 25,126,168
db 24,0,0
db 24,126,168
db 24,0,0
db 25,168,126
db 0
db 26,168,126
db 0
db 24,189,126
db 0
db 25,168,126
db 0
db 0
db 1
db 26,126,168
db 24,0,0
db 25,126,168
db 8,0
db 24,0,126
db 8,0
db 25,126,168
db 24,0,0
db 26,126,168
db 8,0
db 24,0,126
db 8,0
db 25,126,168
db 24,0,0
db 24,126,168
db 9,0
db 26,0,126
db 8,0
db 25,126,168
db 24,0,0
db 24,126,168
db 24,0,0
db 25,168,126
db 0
db 26,168,126
db 0
db 26,189,126
db 2
db 25,212,159
db 0
db 0
db 1
db 26,159,212
db 24,0,0
db 25,159,212
db 8,0
db 25,0,159
db 8,0
db 24,159,212
db 25,0,0
db 26,159,212
db 8,0
db 25,0,159
db 8,0
db 25,159,212
db 24,0,0
db 24,159,212
db 9,0
db 26,0,159
db 8,0
db 25,159,212
db 24,0,0
db 25,159,212
db 24,0,0
db 24,212,159
db 1
db 26,212,159
db 0
db 25,225,168
db 0
db 25,212,159
db 0
db 1
db 0
db 25,159,212
db 16,0
db 9,159
db 8,0
db 25,212,159
db 0
db 1
db 0
db 25,159,212
db 16,0
db 9,159
db 8,0
db 26,189,141
db 0
db 2
db 0
db 26,141,189
db 16,0
db 10,141
db 8,0
db 28,189,141
db 4
db 3
db 3
db 28,141,189
db 20,0
db 11,141
db 11,0
db 121,70,25,59,168
db 16,56
db 8,0
db 0
db 10,168
db 24,0,0
db 24,56,168
db 0
db 9,56
db 0
db 9,168
db 24,0,0
db 26,56,168
db 0
db 8,56
db 0
db 25,63,168
db 8,0
db 8,168
db 0
db 10,63
db 0
db 24,70,168
db 8,0
db 9,168
db 8,0
db 9,168
db 0
db 26,126,168
db 0
db 8,189
db 0
db 25,94,168
db 0
db 8,126
db 0
db 10,168
db 8,0
db 24,42,168
db 0
db 9,94
db 0
db 9,168
db 8,0
db 26,56,168
db 0
db 8,42
db 0
db 9,168
db 8,0
db 8,168
db 0
db 10,56
db 0
db 8,168
db 8,0
db 9,168
db 8,0
db 9,168
db 0
db 10,168
db 0
db 8,189
db 0
db 25,59,212
db 16,56
db 8,0
db 0
db 10,212
db 24,0,0
db 24,56,212
db 0
db 9,56
db 0
db 9,212
db 16,0
db 26,56,212
db 0
db 8,225
db 0
db 25,63,189
db 0
db 8,56
db 0
db 10,189
db 8,0
db 24,70,189
db 0
db 9,63
db 0
db 9,189
db 0
db 26,126,189
db 0
db 8,212
db 0
db 25,126,168
db 16,112
db 8,126
db 0
db 10,168
db 8,0
db 24,112,168
db 0
db 9,112
db 0
db 9,168
db 8,0
db 26,126,168
db 16,112
db 8,112
db 0
db 9,168
db 8,0
db 11,168
db 3
db 10,112
db 0
db 11,168
db 8,0
db 12,168
db 8,0
db 11,168
db 0
db 12,168
db 0
db 12,189
db 0
db 25,59,168
db 16,56
db 8,0
db 0
db 10,168
db 24,0,0
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