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STP.a80
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STP.a80
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; Sound Tracker Pro compiled song player © 1997 KSA software
; refactored, optimized and improved by © 2020 mborik/SinDiKat
device zxspectrum128
@NULL = 0
ifndef PUREPLAYER
org #8000
demo di
ld sp,demo
call music_init
demo.loop ei
halt
call music_play
jr demo.loop
endif
ifndef SINGLESETUP
; bit.0 if you want to play without looping
; bit.1 if you play looped but fadeout after few seconds
; bit.7 is set each time when loop or fadeout was passed
; ...or simplified: 2 - fadeout after loop
; 1 - no loop
; 0 - loop forever
music_setup: db 2
endif
;------------------------------------------------------------------------------
music_init: ld hl,songdata
music_init0: ld (module_addr+1),hl
ld a,#FC
ld (ChA.smppos+1),a
ld (ChB.smppos+1),a
ld (ChC.smppos+1),a
ld a,(hl)
inc hl
ld (speed+1),a
call add_offset.de
ld a,(hl)
ld (song_length+1),a
inc hl
ld a,(hl)
ld (loop_position+1),a
inc hl
ld (positions+1),hl
call add_offset
ld (patterns+1),hl
push hl
call add_offset
ld (ChA.ornoffs+1),hl
ld (ChB.ornoffs+1),hl
ld (ChC.ornoffs+1),hl
call add_offset
ld (ChA.smpoffs+1),hl
ld (ChB.smpoffs+1),hl
ld (ChC.smpoffs+1),hl
ex de,hl
ld a,(hl)
ld (hl),0
pop hl
or a
jr z,.noreloc
.relocator: call add_offset.de
ex de,hl
dec hl
ld (hl),d
dec hl
ld (hl),e
inc hl
inc hl
dec a
jr nz,.relocator
.noreloc: ld hl,empty_pattern
ld c,3
ld (ChA.datptr+1),hl
ld (ChB.datptr+1),hl
ld (ChC.datptr+1),hl
ld h,a
ld l,a
ld (ChA.Xportamnt+1),hl
ld (ChB.Xportamnt+1),hl
ld (ChA.Xpitch+1),hl
ld (ChB.Xpitch+1),hl
ld (ChC.playback+2),a
ld (chkfadeout+1),a
ld (apply_volume+1),a
ld (ChA.attn+1),a
ld (ChB.attn+1),a
ld (ChC.attn+1),a
dec a
ld (current_pos+1),a
ld hl,music_setup
res 7,(hl)
music_mute: xor a
ld (AYREG_EnvSh+1),a
ld hl,AYREG_TonA
ld b,#0D
.loopregs: ld (hl),a
inc hl
djnz .loopregs
ld a,c
ld (tempocnt_0),a
ld bc,#FFFD
ld a,#0C
out (c),a
xor a
ld b,#BF
out (c),a
jp outay
add_offset ex de,hl
.de ld e,(hl)
inc hl
ld d,(hl)
inc hl
ex de,hl
module_addr: ld bc,0
add hl,bc
ret
; ---------------------------------------------------------------------------
resetfadeout: ld hl,music_setup
noloop: set 7,(hl)
xor a
ld (AYREG_AmplA),a
ld (AYREG_AmplB),a
ld (AYREG_AmplC),a
ld (AYREG_EnvSh+1),a
dec a
ld (tempocnt_0),a
ld (chkfadeout+1),a
ld xl,#3F
jp retsp
enablefade: ld a,48
forcefade: ld (chkfadeout+1),a
ld (countfadeout+1),a
ld (divfadeout+1),a
xor a
ld (apply_volume+1),a
jr loop_position
; ---------------------------------------------------------------------------
new_position: ld hl,(ChB.datptr+1)
or (hl)
jp nz,chkfadeout
ld hl,(ChC.datptr+1)
or (hl)
jp nz,chkfadeout
ld b,a
current_pos: ld a,0
inc a
song_length: cp 0
jr nz,song_continue
ld hl,music_setup
bit 1,(hl)
jr nz,enablefade
bit 0,(hl)
jr nz,noloop
loop_position: ld a,0
song_continue: ld (current_pos+1),a
ld c,a
positions: ld hl,NULL
add hl,bc
add hl,bc
ld c,(hl)
inc hl
ld a,(hl)
patterns: ld hl,NULL
add hl,bc
ld sp,hl
pop hl
ld (ChA.datptr+1),hl
pop hl
ld (ChB.datptr+1),hl
pop hl
ld (ChC.datptr+1),hl
add a,#60
ld (ChC.playback+2),a
ld b,a
ld c,#F0
jp ChA.datptr
; ----------------------------------------------------------------------------
music_play: di
ld (retsp+1),sp
ld d,0
exx
ChC.playback: ld bc,#60F0
ld hl,tempocnt_0
dec (hl)
jp nz,ChB.playback
@speed: ld (hl),0
inc hl
dec (hl)
jp p,ChB.Xsmpptr
ChC.datptr: ld hl,NULL
or (hl)
jp z,ChB.Xsmpptr
ChC.readpatt: ld a,(hl)
inc hl
cp #C0
jr c,ChC.nocmd
sub c
jr nc,ChC.setvol
sub c
jp nc,ChC.nop
sub c
jr nc,ChC.setrst
sub c
jp ChC.setenv
ChC.nocmd: sub #80
jr nc,ChC.setspd
sub c
jp nc,ChC.setorn
sbc a,c
jr nc,ChC.setsmp
add a,b
ld (ChC.note+1),a
ld (ChC.datptr+1),hl
xor a
ld (ChC.smppos+1),a
ld (ChC.ornpos+1),a
ld l,a
ld h,a
ld (ChC.pitch+1),hl
jp ChC.exit
ChC.setport: ld a,(hl)
inc hl
ld (ChC.portamnt+1),a
rla
sbc a,a
ld (ChC.portamnt+2),a
jr ChC.readpatt
ChC.setvol: jr z,ChC.setport
dec a
ld (ChC.volume+1),a
jr ChC.readpatt
ChC.setrst: ld a,#FC
ld (ChC.smppos+1),a
ld (ChC.datptr+1),hl
jp ChC.exit
ChC.setsmp: add a,a
exx
ld e,a
ChC.smpoffs: ld hl,NULL
add hl,de
ld sp,hl
pop hl
ld a,(hl)
add a,a
add a,a
ld (ChC.smploop+1),a
inc hl
ld a,(hl)
add a,a
add a,a
ld (ChC.smplen+1),a
ld (ChC.smpptr+1),hl
exx
jp ChC.readpatt
ChC.setspd: ld (ChC.exit+1),a
jp ChC.readpatt
ChC.setenv: ld (env.shape+1),a
ld a,#1F
ld (ChC.ampl+1),a
ld a,(hl)
inc hl
ld (env.period+1),a
ld de,empty_orn
ld (ChC.ornptr+1),de
xor a
ld (ChC.ornloop+1),a
ld (ChC.portamnt+1),a
ld (ChC.portamnt+2),a
inc a
ld (ChC.ornlen+1),a
jp ChC.readpatt
ChC.setorn: add a,a
exx
ld e,a
ld a,#0F
ld (ChC.ampl+1),a
ChC.ornoffs: ld hl,NULL
add hl,de
ld sp,hl
pop hl
ld a,(hl)
ld (ChC.ornloop+1),a
inc hl
ld a,(hl)
ld (ChC.ornlen+1),a
inc hl
ld (ChC.ornptr+1),hl
ld l,d
ld h,d
ld (ChC.portamnt+1),hl
exx
jp ChC.readpatt
; ---------------------------------------------------------------------------
ChB.playback: ld a,(hl)
dec a
jp nz,ChA.playback
ld hl,tempocnt_2
dec (hl)
jp p,chkfadeout
ChB.datptr: ld hl,NULL
or (hl)
jp z,chkfadeout
ChB.readpatt: ld a,(hl)
inc hl
cp #C0
jr c,ChB.nocmd
sub c
jr nc,ChB.setvol
sub c
jr nc,ChB.nop
sub c
jr nc,ChB.setrst
sub c
jr ChB.setenv
ChB.nocmd: sub #80
jr nc,ChB.setspd
sub c
jp nc,ChB.setorn
sbc a,c
jr nc,ChB.setsmp
add a,b
ld (ChB.Xnote+1),a
ld (ChB.datptr+1),hl
xor a
ld (ChB.Xsmppos+1),a
ld l,a
ld h,a
ld (ChB.Xpitch+1),hl
ld a,#22
ld (ChB.Xinst1),a
ld a,#32
ld (ChB.Xinst2),a
jr ChB.exit
ChB.setvol: jr z,ChB.setport
dec a
ld (ChB.Xvolume+1),a
jr ChB.readpatt
ChB.nop: ld (ChB.datptr+1),hl
ChB.exit: ld a,0
ld (tempocnt_2),a
jp chkfadeout
ChB.setrst: ld a,#FC
ld (ChB.Xsmppos+1),a
ld (ChB.datptr+1),hl
jr ChB.exit
ChB.setsmp: add a,a
exx
ld e,a
ChB.smpoffs: ld hl,NULL
add hl,de
ld sp,hl
pop hl
ld a,(hl)
add a,a
add a,a
ld (ChB.Xsmploop+1),a
inc hl
ld a,(hl)
add a,a
add a,a
ld (ChB.Xsmplen+1),a
ld (ChB.Xsmpptr+1),hl
exx
jr ChB.readpatt
ChB.setspd: ld (ChB.exit+1),a
jr ChB.readpatt
ChB.setenv: ld (env.shape+1),a
ld a,#1F
ld (ChB.Xampl+1),a
ld a,(hl)
inc hl
ld (env.period+1),a
ld de,empty_orn
ld (ChB.Xornptr+1),de
ld a,#22
ld (ChB.Xinst3),a
xor a
ld (ChB.Xornloop+1),a
ld (ChB.Xportamnt+1),a
ld (ChB.Xportamnt+2),a
inc a
ld (ChB.Xornlen+1),a
jp ChB.readpatt
ChB.setport: ld a,(hl)
inc hl
ld (ChB.Xportamnt+1),a
rla
sbc a,a
ld (ChB.Xportamnt+2),a
jp ChB.readpatt
ChB.setorn: add a,a
exx
ld e,a
ld a,#0F
ld (ChB.Xampl+1),a
ChB.ornoffs: ld hl,NULL
add hl,de
ld sp,hl
pop hl
ld a,(hl)
ld (ChB.Xornloop+1),a
inc hl
ld a,(hl)
ld (ChB.Xornlen+1),a
inc hl
ld (ChB.Xornptr+1),hl
ld l,d
ld h,d
ld (ChB.Xportamnt+1),hl
ld a,#22
ld (ChB.Xinst3),a
exx
jp ChB.readpatt
; ---------------------------------------------------------------------------
ChA.playback: dec a
jp nz,chkfadeout
dec hl
dec (hl)
jp p,chkfadeout
ChA.datptr: ld hl,NULL
or (hl)
jp z,new_position
ChA.readpatt: ld a,(hl)
inc hl
cp #C0
jr c,ChA.nocmd
sub c
jr nc,ChA.setvol
sub c
jr nc,ChA.nop
sub c
jr nc,ChA.setrst
sub c
jr ChA.setenv
ChA.nocmd: sub #80
jr nc,ChA.setspd
sub c
jp nc,ChA.setorn
sbc a,c
jr nc,ChA.setsmp
add a,b
ld (ChA.Xnote+1),a
ld (ChA.datptr+1),hl
xor a
ld (ChA.Xsmppos+1),a
ld l,a
ld h,a
ld (ChA.Xpitch+1),hl
ld a,#22
ld (ChA.Xinst1),a
ld a,#32
ld (ChA.Xinst2),a
jr ChA.exit
ChA.setvol: jr z,ChA.setport
dec a
ld (ChA.Xvolume+1),a
jr ChA.readpatt
ChA.nop: ld (ChA.datptr+1),hl
ChA.exit: ld a,0
ld (tempocnt_1),a
jp chkfadeout
ChA.setrst: ld a,#FC
ld (ChA.Xsmppos+1),a
ld (ChA.datptr+1),hl
jr ChA.exit
ChA.setsmp: add a,a
exx
ld e,a
ChA.smpoffs: ld hl,NULL
add hl,de
ld sp,hl
pop hl
ld a,(hl)
add a,a
add a,a
ld (ChA.Xsmploop+1),a
inc hl
ld a,(hl)
add a,a
add a,a
ld (ChA.Xsmplen+1),a
ld (ChA.Xsmpptr+1),hl
exx
jr ChA.readpatt
ChA.setspd: ld (ChA.exit+1),a
jr ChA.readpatt
ChA.setenv: ld (env.shape+1),a
ld a,#1F
ld (ChA.Xampl+1),a
ld a,(hl)
inc hl
ld (env.period+1),a
ld de,empty_orn
ld (ChA.Xornptr+1),de
ld a,#22
ld (ChA.Xinst3),a
xor a
ld (ChA.Xornloop+1),a
ld (ChA.Xportamnt+1),a
ld (ChA.Xportamnt+2),a
inc a
ld (ChA.Xornlen+1),a
jp ChA.readpatt
ChA.setport: ld a,(hl)
inc hl
ld (ChA.Xportamnt+1),a
rla
sbc a,a
ld (ChA.Xportamnt+2),a
jp ChA.readpatt
ChA.setorn: add a,a
exx
ld e,a
ld a,#0F
ld (ChA.Xampl+1),a
ChA.ornoffs: ld hl,NULL
add hl,de
ld sp,hl
pop hl
ld a,(hl)
ld (ChA.Xornloop+1),a
inc hl
ld a,(hl)
ld (ChA.Xornlen+1),a
inc hl
ld (ChA.Xornptr+1),hl
ld l,d
ld h,d
ld (ChA.Xportamnt+1),hl
ld a,#22
ld (ChA.Xinst3),a
exx
jp ChA.readpatt
; ---------------------------------------------------------------------------
ChA.mute: xor a
ld (AYREG_AmplA),a
ld xl,9
jp ChB.ornpos
ChB.mute: xor a
ld (AYREG_AmplB),a
ld a,xl
or #12
ld xl,a
jp ChC.ornpos
ChC.mute: xor a
ld (AYREG_AmplC),a
ld a,xl
or #24
ld xl,a
jp retsp
; ---------------------------------------------------------------------------
ChC.nop: ld (ChC.datptr+1),hl
ChC.exit: ld a,0
ld (pattstep_cnt),a
ChB.Xsmpptr: ld hl,NULL
ld (ChB.smpptr+1),hl
ChB.Xornptr: ld hl,NULL
ld (ChB.ornptr+1),hl
ChB.Xpitch: ld hl,NULL
ChB.Xinst1: ld (ChB.pitch+1),hl
ChB.Xportamnt: ld hl,NULL
ChB.Xinst3: ld (ChB.portamnt+1),hl
ChB.Xornlen: ld a,0
ld (ChB.ornlen+1),a
ChB.Xsmplen: ld a,0
ld (ChB.smplen+1),a
ChB.Xornloop: ld a,0
ld (ChB.ornloop+1),a
ChB.Xsmploop: ld a,0
ld (ChB.smploop+1),a
ChB.Xvolume: ld a,0
ld (ChB.volume+1),a
ChB.Xampl: ld a,#0F
ld (ChB.ampl+1),a
ChB.Xnote: ld a,0
ld (ChB.note+1),a
ChB.Xsmppos: ld a,0
cp 1
jr z,ChA.Xsmpptr
ld (ChB.smppos+1),a
ChA.Xsmpptr: ld hl,NULL
ld (ChA.smpptr+1),hl
ChA.Xornptr: ld hl,NULL
ld (ChA.ornptr+1),hl
ChA.Xpitch: ld hl,NULL
ChA.Xinst1: ld (ChA.pitch+1),hl
ChA.Xportamnt: ld hl,NULL
ChA.Xinst3: ld (ChA.portamnt+1),hl
ChA.Xornlen: ld a,0
ld (ChA.ornlen+1),a
ChA.Xsmplen: ld a,0
ld (ChA.smplen+1),a
ChA.Xornloop: ld a,0
ld (ChA.ornloop+1),a
ChA.Xsmploop: ld a,0
ld (ChA.smploop+1),a
ChA.Xvolume: ld a,0
ld (ChA.volume+1),a
ChA.Xampl: ld a,#0F
ld (ChA.ampl+1),a
ChA.Xnote: ld a,0
ld (ChA.note+1),a
ChA.Xsmppos: ld a,0
cp 1
jr z,env.shape
ld (ChA.smppos+1),a
env.shape: ld a,0
ld (AYREG_EnvSh+1),a
env.period: ld a,0
ld (AYREG_Env+1),a
xor a
ld (env.shape+1),a
ChA.Xinst2: ld (ChA.ornpos+1),a
ChB.Xinst2: ld (ChB.ornpos+1),a
inc a
ld (ChA.Xsmppos+1),a
ld (ChA.Xinst2),a
ld (ChB.Xsmppos+1),a
ld (ChB.Xinst2),a
ld (ChA.Xinst1),a
ld (ChB.Xinst1),a
; ---------------------------------------------------------------------------
chkfadeout: ld a,0
or a
jr z,ChA.ornpos
ld a,(music_setup)
rlca
jp c,retsp
countfadeout: ld a,0
dec a
ld (countfadeout+1),a
jr nz,ChA.ornpos
ld e,16
apply_volume: ld a,0
inc a
cp e
jp z,resetfadeout
ld (apply_volume+1),a
ld (ChA.attn+1),a
ld (ChB.attn+1),a
ld (ChC.attn+1),a
bit 3,a ; if value of attenuation
jr z,divfadeout ; hits the 8 we turn off
xor a ; also hw envelopes
ld (env.shape+1),a
ld (AYREG_EnvSh+1),a
ld a,e
dec a
ld (ChA.ampl+1),a
ld (ChB.ampl+1),a
ld (ChC.ampl+1),a
divfadeout: ld a,0
srl a
ld e,a
srl e
add a,e
jr nz,divfadeout1
inc a
divfadeout1: ld (divfadeout+1),a
add a,a
ld (countfadeout+1),a
ChA.ornpos: ld de,0
ChA.ornptr: ld hl,NULL
add hl,de
inc e
ld a,e
ChA.ornlen: cp 0
jr nz,ChA.readorn
ChA.ornloop: ld a,0
ChA.readorn: ld (ChA.ornpos+1),a
ChA.note: ld a,0
add a,(hl)
add a,a
ld e,a
ld hl,freqtable
add hl,de
ld sp,hl
ChA.smppos: ld a,0
ChA.smpptr: ld hl,NULL
inc a
jp m,ChA.mute
ld e,a
add hl,de
add a,3
ChA.smplen: cp 0
jr nz,ChA.readsmp
ChA.smploop: ld a,0
ChA.readsmp: ld (ChA.smppos+1),a
pop bc
ld sp,hl
pop de
ld h,0
ld a,e
and #0F
ChA.volume: sub 0
ld l,a
ccf
sbc a,a
and l
srl d
jr nc,ChA.attn
set 4,h
ChA.attn: sub 0
jr nc,ChA.attnn
xor a
ChA.attnn: or h
ChA.ampl: and 0
ld (AYREG_AmplA),a
ld a,e
rlca
jr c,ChA.pitch
ld xh,d
ChA.pitch: ld hl,NULL
ChA.portamnt: ld de,0
add hl,de
ld (ChA.pitch+1),hl
add hl,bc
pop bc
add hl,bc
rlca
rlca
rlca
and #0F
ld xl,a
ld a,h
and #0F
ld h,a
ld (AYREG_TonA),hl
ChB.ornpos: ld de,0
ChB.ornptr: ld hl,NULL
add hl,de
inc e
ld a,e
ChB.ornlen: cp 0
jr nz,ChB.readorn
ChB.ornloop: ld a,0
ChB.readorn: ld (ChB.ornpos+1),a
ChB.note: ld a,0
add a,(hl)
add a,a
ld e,a
ld hl,freqtable
add hl,de
ld sp,hl
ChB.smppos: ld a,NULL
ChB.smpptr: ld hl,NULL
inc a
jp m,ChB.mute
ld e,a
add hl,de
add a,3
ChB.smplen: cp 0
jr nz,ChB.readsmp
ChB.smploop: ld a,0
ChB.readsmp: ld (ChB.smppos+1),a
pop bc
ld sp,hl
pop de
ld h,0
ld a,e
and #0F
ChB.volume: sub 0
ld l,a
ccf
sbc a,a
and l
srl d
jr nc,ChB.attn
set 4,h
ChB.attn: sub 0
jr nc,ChB.attnn
xor a
ChB.attnn: or h
ChB.ampl: and 0
ld (AYREG_AmplB),a
ld a,e
rrca
rrca
rrca
and #1E
or xl
ld xl,a
and #10
jr nz,ChB.pitch
ld xh,d
ChB.pitch: ld hl,NULL
ChB.portamnt: ld de,0
add hl,de
ld (ChB.pitch+1),hl
add hl,bc
pop bc
add hl,bc
ld a,h
and #0F
ld h,a
ld (AYREG_TonB),hl
ChC.ornpos: ld de,0
ChC.ornptr: ld hl,NULL
add hl,de
inc e
ld a,e
ChC.ornlen: cp 0
jr nz,ChC.readorn
ChC.ornloop: ld a,0
ChC.readorn: ld (ChC.ornpos+1),a
ChC.note: ld a,0
add a,(hl)
add a,a
ld e,a
ld hl,freqtable
add hl,de
ld sp,hl
ChC.smppos: ld a,0
ChC.smpptr: ld hl,NULL
inc a
jp m,ChC.mute
ld e,a
add hl,de
add a,3
ChC.smplen: cp 0
jr nz,ChC.readsmp
ChC.smploop: ld a,0
ChC.readsmp: ld (ChC.smppos+1),a
pop bc
ld sp,hl
pop de
ld h,0
ld a,e
and #0F
ChC.volume: sub 0
ld l,a
ccf
sbc a,a
and l
srl d
jr nc,ChC.attn
set 4,h
ChC.attn: sub 0
jr nc,ChC.attnn
xor a
ChC.attnn: or h
ChC.ampl: and 0
ld (AYREG_AmplC),a
ld a,e
rrca
rrca
and #3C
or xl
ld xl,a
and #20
jr nz,ChC.pitch
ld xh,d
ChC.pitch: ld hl,NULL
ChC.portamnt: ld de,0
add hl,de
ld (ChC.pitch+1),hl
add hl,bc
pop bc
add hl,bc
ld a,h
and #0F
ld h,a
ld (AYREG_TonC),hl
@retsp: ld sp,0
outay: ld hl,AYREG_AmplC
ld de,#FFBF
ld bc,#FFFD
ld a,#0D
out (c),a
AYREG_EnvSh: ld a,0
or a
jr z,noenvelopes
ld b,e
out (c),a
ld a,#0B
ld b,d
out (c),a
ld b,e
AYREG_Env: ld a,0
out (c),a
ld b,d
noenvelopes: ld a,#0A
out (c),a
ld b,e
outd
dec a
ld b,d
out (c),a
ld b,e
outd
dec a
ld b,d
out (c),a
ld b,e
outd
dec a
ld b,d
out (c),a
ld b,e
ld a,xl
out (c),a
ld a,6
ld b,d
out (c),a
ld b,e
ld a,xh
out (c),a
ld a,5
ld b,d
out (c),a
ld b,e
outd
dec a
ld b,d
out (c),a
ld b,e
outd
dec a
ld b,d
out (c),a
ld b,e
outd
dec a
ld b,d
out (c),a
ld b,e
outd
dec a
ld b,d
out (c),a
ld b,e
outd
dec a
ld b,d
out (c),a
ld b,e
outd
ld (AYREG_EnvSh+1),a
ei
ret
;------------------------------------------------------------------------------
freqtable dw #0EF8, #0E10, #0D60, #0C80, #0BD8, #0B28, #0A88, #09F0
dw #0960, #08E0, #0858, #07E0, #077C, #0708, #06B0, #0640