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-
- ;
- ; NoisetrackerV1.0 replayroutine
- ; Mahoney & Kaktus - HALLONSOFT 1989
- ;
-
- mt_data=$58000
-
- mt_init:lea mt_data,a0
- move.l a0,a1
- add.l #$3b8,a1
- moveq #$7f,d0
- moveq #0,d1
- mt_loop:move.l d1,d2
- subq.w #1,d0
- mt_lop2:move.b (a1)+,d1
- cmp.b d2,d1
- bgt.s mt_loop
- dbf d0,mt_lop2
- addq.b #1,d2
-
- lea mt_samplestarts(pc),a1
- asl.l #8,d2
- asl.l #2,d2
- add.l #$43c,d2
- add.l a0,d2
- move.l d2,a2
- moveq #$1e,d0
- mt_lop3:clr.l (a2)
- move.l a2,(a1)+
- moveq #0,d1
- move.w 42(a0),d1
- asl.l #1,d1
- add.l d1,a2
- add.l #$1e,a0
- dbf d0,mt_lop3
-
- or.b #$2,$bfe001
- move.b #$6,mt_speed
- clr.w $dff0a8
- clr.w $dff0b8
- clr.w $dff0c8
- clr.w $dff0d8
- clr.b mt_songpos
- clr.b mt_counter
- clr.w mt_pattpos
- rts
-
- mt_end: clr.w $dff0a8
- clr.w $dff0b8
- clr.w $dff0c8
- clr.w $dff0d8
- move.w #$f,$dff096
- rts
-
- mt_music:
- movem.l d0-d4/a0-a3/a5-a6,-(a7)
- lea mt_data,a0
- addq.b #$1,mt_counter
- move.b mt_counter,D0
- cmp.b mt_speed,D0
- blt.s mt_nonew
- clr.b mt_counter
- bra mt_getnew
-
- mt_nonew:
- lea mt_voice1(pc),a6
- lea $dff0a0,a5
- bsr mt_checkcom
- lea mt_voice2(pc),a6
- lea $dff0b0,a5
- bsr mt_checkcom
- lea mt_voice3(pc),a6
- lea $dff0c0,a5
- bsr mt_checkcom
- lea mt_voice4(pc),a6
- lea $dff0d0,a5
- bsr mt_checkcom
- bra mt_endr
-
- mt_arpeggio:
- moveq #0,d0
- move.b mt_counter,d0
- divs #$3,d0
- swap d0
- cmp.w #$0,d0
- beq.s mt_arp2
- cmp.w #$2,d0
- beq.s mt_arp1
-
- moveq #0,d0
- move.b $3(a6),d0
- lsr.b #4,d0
- bra.s mt_arp3
- mt_arp1:moveq #0,d0
- move.b $3(a6),d0
- and.b #$f,d0
- bra.s mt_arp3
- mt_arp2:move.w $10(a6),d2
- bra.s mt_arp4
- mt_arp3:asl.w #1,d0
- moveq #0,d1
- move.w $10(a6),d1
- lea mt_periods(pc),a0
- moveq #$24,d7
- mt_arploop:
- move.w (a0,d0.w),d2
- cmp.w (a0),d1
- bge.s mt_arp4
- addq.l #2,a0
- dbf d7,mt_arploop
- rts
- mt_arp4:move.w d2,$6(a5)
- rts
-
- mt_getnew:
- lea mt_data,a0
- move.l a0,a3
- move.l a0,a2
- add.l #$c,a3
- add.l #$3b8,a2
- add.l #$43c,a0
-
- moveq #0,d0
- move.l d0,d1
- move.b mt_songpos,d0
- move.b (a2,d0.w),d1
- asl.l #8,d1
- asl.l #2,d1
- add.w mt_pattpos,d1
- clr.w mt_dmacon
-
- lea $dff0a0,a5
- lea mt_voice1(pc),a6
- bsr.s mt_playvoice
- lea $dff0b0,a5
- lea mt_voice2(pc),a6
- bsr.s mt_playvoice
- lea $dff0c0,a5
- lea mt_voice3(pc),a6
- bsr.s mt_playvoice
- lea $dff0d0,a5
- lea mt_voice4(pc),a6
- bsr.s mt_playvoice
- bra mt_setdma
-
- mt_playvoice:
- move.l (a0,d1.l),(a6)
- addq.l #4,d1
- moveq #0,d2
- move.b $2(a6),d2
- and.b #$f0,d2
- lsr.b #4,d2
- move.b (a6),d0
- and.b #$f0,d0
- or.b d0,d2
- tst.b d2
- beq.s mt_setregs
- moveq #0,d3
- lea mt_samplestarts(pc),a1
- move.l d2,d4
- subq.l #$1,d2
- asl.l #2,d2
- mulu #$1e,d4
- move.l (a1,d2.l),$4(a6)
- move.w (a3,d4.l),$8(a6)
- move.w $2(a3,d4.l),$12(a6)
- move.w $4(a3,d4.l),d3
- tst.w d3
- beq.s mt_noloop
- move.l $4(a6),d2
- asl.w #1,d3
- add.l d3,d2
- move.l d2,$a(a6)
- move.w $4(a3,d4.l),d0
- add.w $6(a3,d4.l),d0
- move.w d0,8(a6)
- move.w $6(a3,d4.l),$e(a6)
- move.w $12(a6),$8(a5)
- bra.s mt_setregs
- mt_noloop:
- move.l $4(a6),d2
- add.l d3,d2
- move.l d2,$a(a6)
- move.w $6(a3,d4.l),$e(a6)
- move.w $12(a6),$8(a5)
- mt_setregs:
- move.w (a6),d0
- and.w #$fff,d0
- beq mt_checkcom2
- move.b $2(a6),d0
- and.b #$F,d0
- cmp.b #$3,d0
- bne.s mt_setperiod
- bsr mt_setmyport
- bra mt_checkcom2
- mt_setperiod:
- move.w (a6),$10(a6)
- and.w #$fff,$10(a6)
- move.w $14(a6),d0
- move.w d0,$dff096
- clr.b $1b(a6)
-
- move.l $4(a6),(a5)
- move.w $8(a6),$4(a5)
- move.w $10(a6),d0
- and.w #$fff,d0
- move.w d0,$6(a5)
- move.w $14(a6),d0
- or.w d0,mt_dmacon
- bra mt_checkcom2
-
- mt_setdma:
- move.w #$12c,d0
- mt_wait:dbf d0,mt_wait
- move.w mt_dmacon,d0
- or.w #$8000,d0
- move.w d0,$dff096
- move.w #$12c,d0
- mt_wai2:dbf d0,mt_wai2
- lea $dff000,a5
- lea mt_voice4(pc),a6
- move.l $a(a6),$d0(a5)
- move.w $e(a6),$d4(a5)
- lea mt_voice3(pc),a6
- move.l $a(a6),$c0(a5)
- move.w $e(a6),$c4(a5)
- lea mt_voice2(pc),a6
- move.l $a(a6),$b0(a5)
- move.w $e(a6),$b4(a5)
- lea mt_voice1(pc),a6
- move.l $a(a6),$a0(a5)
- move.w $e(a6),$a4(a5)
-
- add.w #$10,mt_pattpos
- cmp.w #$400,mt_pattpos
- bne.s mt_endr
- mt_nex: clr.w mt_pattpos
- clr.b mt_break
- addq.b #1,mt_songpos
- and.b #$7f,mt_songpos
- move.b mt_songpos,d1
- cmp.b mt_data+$3b6,d1
- bne.s mt_endr
- clr.b mt_songpos
- mt_endr:tst.b mt_break
- bne.s mt_nex
- movem.l (a7)+,d0-d4/a0-a3/a5-a6
- rts
-
- mt_setmyport:
- move.w (a6),d2
- and.w #$fff,d2
- move.w d2,$18(a6)
- move.w $10(a6),d0
- clr.b $16(a6)
- cmp.w d0,d2
- beq.s mt_clrport
- bge.s mt_rt
- move.b #$1,$16(a6)
- rts
- mt_clrport:
- clr.w $18(a6)
- mt_rt: rts
-
- mt_myport:
- move.b $3(a6),d0
- beq.s mt_myslide
- move.b d0,$17(a6)
- clr.b $3(a6)
- mt_myslide:
- tst.w $18(a6)
- beq.s mt_rt
- moveq #0,d0
- move.b $17(a6),d0
- tst.b $16(a6)
- bne.s mt_mysub
- add.w d0,$10(a6)
- move.w $18(a6),d0
- cmp.w $10(a6),d0
- bgt.s mt_myok
- move.w $18(a6),$10(a6)
- clr.w $18(a6)
- mt_myok:move.w $10(a6),$6(a5)
- rts
- mt_mysub:
- sub.w d0,$10(a6)
- move.w $18(a6),d0
- cmp.w $10(a6),d0
- blt.s mt_myok
- move.w $18(a6),$10(a6)
- clr.w $18(a6)
- move.w $10(a6),$6(a5)
- rts
-
- mt_vib: move.b $3(a6),d0
- beq.s mt_vi
- move.b d0,$1a(a6)
-
- mt_vi: move.b $1b(a6),d0
- lea mt_sin(pc),a4
- lsr.w #$2,d0
- and.w #$1f,d0
- moveq #0,d2
- move.b (a4,d0.w),d2
- move.b $1a(a6),d0
- and.w #$f,d0
- mulu d0,d2
- lsr.w #$6,d2
- move.w $10(a6),d0
- tst.b $1b(a6)
- bmi.s mt_vibmin
- add.w d2,d0
- bra.s mt_vib2
- mt_vibmin:
- sub.w d2,d0
- mt_vib2:move.w d0,$6(a5)
- move.b $1a(a6),d0
- lsr.w #$2,d0
- and.w #$3c,d0
- add.b d0,$1b(a6)
- rts
-
- mt_nop: move.w $10(a6),$6(a5)
- rts
-
- mt_checkcom:
- move.w $2(a6),d0
- and.w #$fff,d0
- beq.s mt_nop
- move.b $2(a6),d0
- and.b #$f,d0
- tst.b d0
- beq mt_arpeggio
- cmp.b #$1,d0
- beq.s mt_portup
- cmp.b #$2,d0
- beq mt_portdown
- cmp.b #$3,d0
- beq mt_myport
- cmp.b #$4,d0
- beq mt_vib
- move.w $10(a6),$6(a5)
- cmp.b #$a,d0
- beq.s mt_volslide
- rts
-
- mt_volslide:
- moveq #0,d0
- move.b $3(a6),d0
- lsr.b #4,d0
- tst.b d0
- beq.s mt_voldown
- add.w d0,$12(a6)
- cmp.w #$40,$12(a6)
- bmi.s mt_vol2
- move.w #$40,$12(a6)
- mt_vol2:move.w $12(a6),$8(a5)
- rts
-
- mt_voldown:
- moveq #0,d0
- move.b $3(a6),d0
- and.b #$f,d0
- sub.w d0,$12(a6)
- bpl.s mt_vol3
- clr.w $12(a6)
- mt_vol3:move.w $12(a6),$8(a5)
- rts
-
- mt_portup:
- moveq #0,d0
- move.b $3(a6),d0
- sub.w d0,$10(a6)
- move.w $10(a6),d0
- and.w #$fff,d0
- cmp.w #$71,d0
- bpl.s mt_por2
- and.w #$f000,$10(a6)
- or.w #$71,$10(a6)
- mt_por2:move.w $10(a6),d0
- and.w #$fff,d0
- move.w d0,$6(a5)
- rts
-
- mt_portdown:
- clr.w d0
- move.b $3(a6),d0
- add.w d0,$10(a6)
- move.w $10(a6),d0
- and.w #$fff,d0
- cmp.w #$358,d0
- bmi.s mt_por3
- and.w #$f000,$10(a6)
- or.w #$358,$10(a6)
- mt_por3:move.w $10(a6),d0
- and.w #$fff,d0
- move.w d0,$6(a5)
- rts
-
- mt_checkcom2:
- move.b $2(a6),d0
- and.b #$f,d0
- cmp.b #$e,d0
- beq.s mt_setfilt
- cmp.b #$d,d0
- beq.s mt_pattbreak
- cmp.b #$b,d0
- beq.s mt_posjmp
- cmp.b #$c,d0
- beq.s mt_setvol
- cmp.b #$f,d0
- beq.s mt_setspeed
- rts
-
- mt_setfilt:
- move.b $3(a6),d0
- and.b #$1,d0
- asl.b #$1,d0
- and.b #$fd,$bfe001
- or.b d0,$bfe001
- rts
- mt_pattbreak:
- not.b mt_break
- rts
- mt_posjmp:
- move.b $3(a6),d0
- subq.b #$1,d0
- move.b d0,mt_songpos
- not.b mt_break
- rts
- mt_setvol:
- cmp.b #$40,$3(a6)
- ble.s mt_vol4
- move.b #$40,$3(a6)
- mt_vol4:move.b $3(a6),$8(a5)
- rts
- mt_setspeed:
- move.b $3(a6),d0
- and.w #$1f,d0
- beq.s mt_rts2
- clr.b mt_counter
- move.b d0,mt_speed
- mt_rts2:rts
-
- mt_sin:
- dc.b $00,$18,$31,$4a,$61,$78,$8d,$a1,$b4,$c5,$d4,$e0,$eb,$f4,$fa,$fd
- dc.b $ff,$fd,$fa,$f4,$eb,$e0,$d4,$c5,$b4,$a1,$8d,$78,$61,$4a,$31,$18
-
- mt_periods:
- dc.w $0358,$0328,$02fa,$02d0,$02a6,$0280,$025c,$023a,$021a,$01fc,$01e0
- dc.w $01c5,$01ac,$0194,$017d,$0168,$0153,$0140,$012e,$011d,$010d,$00fe
- dc.w $00f0,$00e2,$00d6,$00ca,$00be,$00b4,$00aa,$00a0,$0097,$008f,$0087
- dc.w $007f,$0078,$0071,$0000,$0000
-
- mt_speed: dc.b $6
- mt_songpos: dc.b $0
- mt_pattpos: dc.w $0
- mt_counter: dc.b $0
-
- mt_break: dc.b $0
- mt_dmacon: dc.w $0
- mt_samplestarts:blk.l $1f,0
- mt_voice1: blk.w 10,0
- dc.w $1
- blk.w 3,0
- mt_voice2: blk.w 10,0
- dc.w $2
- blk.w 3,0
- mt_voice3: blk.w 10,0
- dc.w $4
- blk.w 3,0
- mt_voice4: blk.w 10,0
- dc.w $8
- blk.w 3,0
-