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ptreplay.s
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ptreplay.s
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;*--------------T-----------T-------------------------------T------------T-----
;* Protracker V3.0a ReplayCode (68000)
;* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
;*
;* Based on the V2.xx code from Mushroom Studios.
;*
;* Date: 22.06.97
;*
;* This is a high optimized replay code for Pro/NoiseTracker modules.
;* It's not for learning .. it's for playing ;)
;* - 100% PC-Relativ.
;* - High Speed Replay.
;* - Less Bytes
;* - Linkable.
;* - Fixed bad period handling.
;* But there still tempo problems!
;* -Use the CED-Tabs in the 4th line
;*
;* lea your module (mt_data) to a0 and call mt_init.
;* No registers will be crashed.
;* Tested with Devpac, SNMA, PhxAss, Barfly, OMA, AsmOne, MaxonAsm
;*-----------------------------------------------------------------------------
INIT_SPEED EQU 6
TEMPO_MIN EQU 3 ;(blt) ;set here the tempo
TEMPO_MAX EQU 8 ;(bgt) ;min/max rates
NO_TEMPO SET 0 ;set this to 1
;and tempo e-commands
;will be ignored
NO_MINMAX SET 1 ;set this to 1
;and min/max tempo will
;be ignored
XDEF _mt_init
XDEF _mt_music
XDEF _mt_end
n_note EQU 0 ;w
n_cmd EQU 2 ;w
n_cmdlo EQU 3 ;b
n_start EQU 4 ;l
n_length EQU 8 ;w
n_loopstart EQU 10 ;l
n_replen EQU 14 ;w
n_period EQU 16 ;w
n_finetune EQU 18 ;b
n_volume EQU 19 ;b
n_dmabit EQU 20 ;w
n_toneportdirec EQU 22 ;b
n_toneportspeed EQU 23 ;b
n_wantedperiod EQU 24 ;w
n_vibratocmd EQU 26 ;b
n_vibratopos EQU 27 ;b
n_tremolocmd EQU 28 ;b
n_tremolopos EQU 29 ;b
n_wavecontrol EQU 30 ;b
n_glissfunk EQU 31 ;b
n_sampleoffset EQU 32 ;b
n_pattpos EQU 33 ;b
n_loopcount EQU 34 ;b
n_funkoffset EQU 35 ;b
n_wavestart EQU 36 ;l
n_reallength EQU 40 ;w
n_trigger = 42 ; b
;*-----------------------------------------------------------------------------
_mt_init movem.l d0-d2/a0-a3,-(sp)
lea mt_base(pc),a3
lea mt_data,a0
move.l a0,mt_songdata-mt_base(a3)
lea 952(a0),a1
moveq #128-1,d0
moveq #0,d1
moveq #0,d2
mt_ghighpp move.b (a1)+,d1
cmp.b d2,d1
ble.s mt_ples
move.b d1,d2
mt_ples dbra d0,mt_ghighpp
addq.b #1,d2
lea mt_samples-mt_base(a3),a1
lsl.l #8,d2
add.l d2,d2
add.l d2,d2
lea (a0,d2.l),a2
lea 1084(a2),a2
moveq #31-1,d0
mt_stufsmp
; clr.l (a2) ; OUT OF RANGE SOMETIMES!!!
move.l a2,(a1)+
moveq #0,d1
move.w 42(a0),d1
add.l d1,d1
add.l d1,a2
lea 30(a0),a0
dbra d0,mt_stufsmp
or.b #2,$BFE001
moveq #INIT_SPEED,d0
move.b d0,mt_speed-mt_base(a3)
clr.b mt_counter-mt_base(a3)
clr.b mt_songpos-mt_base(a3)
clr.w mt_pattpos-mt_base(a3)
movem.l (sp)+,d0-d2/a0-a3
_mt_end move.l a0,-(sp)
lea $DFF000,a0
clr.w $A8(a0)
clr.w $B8(a0)
clr.w $C8(a0)
clr.w $D8(a0)
move.w #15,$96(a0)
move.l (sp)+,a0
rts
;*-----------------------------------------------------------------------------
_mt_music movem.l d0-d7/a0-a6,-(sp)
moveq #$0F,d7
move.b #$F0,d5
lea mt_base(pc),a4
lea $DFF0A0,a5
lea mt_counter-mt_base(a4),a0
addq.b #1,(a0)
move.b (a0),d0
cmp.b mt_speed-mt_base(a4),d0
blt.s mt_nonewnote
clr.b (a0)
tst.b mt_patdeltime2-mt_base(a4)
beq.s mt_getnewnote
pea mt_dmaskip-mt_base(a4)
bra.s mt_nonewvoice
mt_nonewnote pea mt_nonewpos-mt_base(a4)
mt_nonewvoice lea mt_voice1-mt_base(a4),a6
bsr mt_checkefx
lea $10(a5),a5
lea mt_voice2-mt_base(a4),a6
bsr mt_checkefx
lea $10(a5),a5
lea mt_voice3-mt_base(a4),a6
bsr mt_checkefx
lea $10(a5),a5
lea mt_voice4-mt_base(a4),a6
bra mt_checkefx
mt_getnewnote move.l mt_songdata-mt_base(a4),a0
lea 12(a0),a3
lea 952(a0),a2
lea 1084(a0),a0
moveq #0,d0
moveq #0,d1
move.b mt_songpos-mt_base(a4),d0
move.b (a2,d0.w),d1
lsl.l #8,d1
add.l d1,d1
add.l d1,d1
add.w mt_pattpos-mt_base(a4),d1
clr.w mt_dmacon-mt_base(a4)
lea mt_voice1-mt_base(a4),a6
bsr.s mt_playvoice
lea $10(a5),a5
lea mt_voice2-mt_base(a4),a6
bsr.s mt_playvoice
lea $10(a5),a5
lea mt_voice3-mt_base(a4),a6
bsr.s mt_playvoice
lea $10(a5),a5
lea mt_voice4-mt_base(a4),a6
pea mt_setdma-mt_base(a4)
mt_playvoice tst.l (a6)
bne.s mt_plvskip
bsr mt_periodnop
mt_plvskip move.l (a0,d1.l),(a6)
addq.l #4,d1
moveq #0,d2
move.b n_cmd(a6),d2
lsr.b #4,d2
move.b (a6),d0
and.b d5,d0
or.b d0,d2
beq mt_setregs
moveq #0,d3
lea mt_samples-mt_base(a4),a1
move.w d2,d4
subq.l #1,d2
add.l d2,d2
add.l d2,d2
move.w d4,d6
lsl.w #5,d4
sub.w d6,d4
sub.w d6,d4
move.l (a1,d2.l),n_start(a6)
move.w (a3,d4.w),n_length(a6)
move.w (a3,d4.w),n_reallength(a6)
move.b 2(a3,d4.w),n_finetune(a6)
move.b 3(a3,d4.w),n_volume(a6)
move.w 4(a3,d4.w),d3
beq.s mt_noloop
move.l n_start(a6),d2
move.w d3,d6
add.w d3,d3
add.l d3,d2
move.l d2,n_loopstart(a6)
move.l d2,n_wavestart(a6)
move.w 6(a3,d4.w),d0
move.w d0,n_replen(a6)
add.w d6,d0
move.w d0,n_length(a6)
moveq #0,d0
move.b n_volume(a6),d0
move.w d0,8(a5)
bra.s mt_setregs
mt_noloop move.l n_start(a6),d2
add.l d3,d2
move.l d2,n_loopstart(a6)
move.l d2,n_wavestart(a6)
move.w 6(a3,d4.w),n_replen(a6)
moveq #0,d0
move.b n_volume(a6),d0
move.w d0,8(a5)
mt_setregs move.w (a6),d0
and.w #$0FFF,d0
beq mt_checkefx2
move.w n_cmd(a6),d0
and.w #$0FF0,d0
cmp.w #$0E50,d0
beq.s mt_dostfnetu
move.b n_cmd(a6),d0
and.b d7,d0
moveq #3,d6
cmp.b d6,d0
beq.s mt_chktonepor
moveq #5,d6
cmp.b d6,d0
beq.s mt_chktonepor
moveq #9,d6
cmp.b d6,d0
bne.s mt_setperiod
pea mt_setperiod-mt_base(a4)
bra mt_checkefx2
mt_chktonepor pea mt_checkefx2-mt_base(a4)
bra mt_sttonepor
mt_dostfnetu bsr mt_stfinetune
mt_setperiod move.w (a6),d2
and.w #$0FFF,d2
lea mt_periodtab-mt_base(a4),a1
moveq #0,d0
moveq #36-1,d3
mt_ftuloop cmp.w (a1,d0.w),d2
bge.s mt_ftufound
addq.l #2,d0
dbra d3,mt_ftuloop
mt_ftufound moveq #0,d2
move.b n_finetune(a6),d2
mulu.w #36*2,d2
add.l d2,a1
move.w (a1,d0.w),n_period(a6)
move.w n_cmd(a6),d0
and.w #$0FF0,d0
cmp.w #$0ED0,d0
beq mt_checkefx2
move.w n_dmabit(a6),$DFF096
btst #2,n_wavecontrol(a6)
bne.s mt_vibnoc
clr.b n_vibratopos(a6)
mt_vibnoc btst #6,n_wavecontrol(a6)
bne.s mt_trenoc
clr.b n_tremolopos(a6)
mt_trenoc move.l n_start(a6),(a5)
move.w n_length(a6),4(a5)
move.w n_period(a6),6(a5)
st n_trigger(a6)
move.w n_dmabit(a6),d0
or.w d0,mt_dmacon-mt_base(a4)
bra mt_checkefx2
mt_dmawait moveq #5-1,d0
mt_loop3 move.b $DFF006,d6
mt_loop4 cmp.b $DFF006,d6
beq.s mt_loop4
dbra d0,mt_loop3
rts
mt_setdma bsr.s mt_dmawait
lea $DFF000,a5
move.w mt_dmacon-mt_base(a4),d0
or.w #$8000,d0
move.w d0,$96(a5)
bsr.s mt_dmawait
lea mt_voice4-mt_base(a4),a6
move.l n_loopstart(a6),$D0(a5)
move.w n_replen(a6),$D4(a5)
lea mt_voice3-mt_base(a4),a6
move.l n_loopstart(a6),$C0(a5)
move.w n_replen(a6),$C4(a5)
lea mt_voice2-mt_base(a4),a6
move.l n_loopstart(a6),$B0(a5)
move.w n_replen(a6),$B4(a5)
lea mt_voice1-mt_base(a4),a6
move.l n_loopstart(a6),$A0(a5)
move.w n_replen(a6),$A4(a5)
mt_dmaskip add.w #16,mt_pattpos-mt_base(a4)
move.b mt_patdeltime-mt_base(a4),d0
beq.s mt_dskc
move.b d0,mt_patdeltime2-mt_base(a4)
clr.b mt_patdeltime-mt_base(a4)
mt_dskc tst.b mt_patdeltime2-mt_base(a4)
beq.s mt_dska
subq.b #1,mt_patdeltime2-mt_base(a4)
beq.s mt_dska
sub.w #16,mt_pattpos-mt_base(a4)
mt_dska tst.b mt_break-mt_base(a4)
beq.s mt_nnpysk
clr.b mt_break-mt_base(a4)
moveq #0,d0
move.b mt_breakpos-mt_base(a4),d0
clr.b mt_breakpos-mt_base(a4)
lsl.w #4,d0
move.w d0,mt_pattpos-mt_base(a4)
mt_nnpysk cmp.w #1024,mt_pattpos-mt_base(a4)
blt.s mt_nonewpos
mt_nextpos moveq #0,d0
move.b mt_breakpos-mt_base(a4),d0
lsl.w #4,d0
move.w d0,mt_pattpos-mt_base(a4)
clr.b mt_breakpos-mt_base(a4)
clr.b mt_jmpflg-mt_base(a4)
lea mt_songpos-mt_base(a4),a1
addq.b #1,(a1)
and.b #$7f,(a1)
move.b (a1),d1
move.l mt_songdata-mt_base(a4),a0
cmp.b 950(a0),d1
blt.s mt_nonewpos
clr.b (a1)
mt_nonewpos tst.b mt_jmpflg-mt_base(a4)
bne.s mt_nextpos
movem.l (sp)+,d0-d7/a0-a6
rts
mt_checkefx bsr mt_updatefunk
move.w n_cmd(a6),d0
and.w #$0FFF,d0
beq.s mt_periodnop
lsr.w #8,d0
beq.s mt_arpeggio
subq.b #1,d0
beq mt_porup
subq.b #1,d0
beq mt_pordown
subq.b #1,d0
beq mt_tonepor
subq.b #1,d0
beq mt_vibrato
subq.b #1,d0
beq mt_tonevolslide
subq.b #1,d0
beq mt_vibvolslide
subq.b #8,d0
beq mt_ecomms
move.w n_period(a6),6(a5)
addq.b #4,d0
beq mt_volumeslide
addq.b #3,d0
beq mt_tremolo
rts
mt_periodnop move.w n_period(a6),6(a5)
rts
mt_arpeggio moveq #0,d1
moveq #0,d0
move.b mt_counter-mt_base(a4),d1
divs.w #3,d1
swap d1
tst.w d1
beq.s mt_arp2
move.b n_cmdlo(a6),d0
subq.w #2,d1
beq.s mt_arp1
lsr.b #4,d0
bra.s mt_arp3
mt_arp1 and.b d7,d0
mt_arp3 add.w d0,d0
moveq #0,d1
move.b n_finetune(a6),d1
mulu.w #36*2,d1
lea mt_periodtab-mt_base(a4),a0
add.l d1,a0
move.w n_period(a6),d1
moveq #36-1,d3
mt_arploop move.w (a0,d0.w),d2
cmp.w (a0)+,d1
bge.s mt_arp4
dbra d3,mt_arploop
rts
mt_arp2 move.w n_period(a6),6(a5)
rts
mt_arp4 move.w d2,6(a5)
rts
mt_fineporup tst.b mt_counter-mt_base(a4)
bne.s mt_rts
move.b d7,mt_lowmask-mt_base(a4)
mt_porup moveq #0,d0
move.b n_cmdlo(a6),d0
and.b mt_lowmask-mt_base(a4),d0
lea n_period(a6),a1
sub.w d0,(a1)
move.w (a1),d0
and.w #$0FFF,d0
moveq #113,d6
cmp.w d6,d0
bpl.s mt_porupskip
mt_porand and.w #$F000,(a1)
or.w d6,(a1)
mt_porupskip move.w (a1),d0
and.w #$0FFF,d0
move.w d0,6(a5)
st mt_lowmask-mt_base(a4)
mt_rts rts
mt_finepordown tst.b mt_counter-mt_base(a4)
bne.s mt_rts
move.b d7,mt_lowmask-mt_base(a4)
mt_pordown moveq #0,d0
move.b n_cmdlo(a6),d0
and.b mt_lowmask-mt_base(a4),d0
lea n_period(a6),a1
add.w d0,(a1)
move.w (a1),d0
and.w #$0FFF,d0
move.w #856,d6
cmp.w d6,d0
bmi.s mt_porupskip
bra.s mt_porand
mt_sttonepor move.w (a6),d2
and.w #$0FFF,d2
moveq #0,d0
move.b n_finetune(a6),d0
moveq #36*2,d3
mulu.w d3,d0
lea mt_periodtab-mt_base(a4),a1
add.l d0,a1
moveq #0,d0
mt_stploop cmp.w (a1,d0.w),d2
bge.s mt_stpfound
addq.w #2,d0
cmp.w d3,d0
blt.s mt_stploop
moveq #35*2,d0
mt_stpfound move.b n_finetune(a6),d2
and.b #8,d2
beq.s mt_stpgoss
tst.w d0
beq.s mt_stpgoss
subq.w #2,d0
mt_stpgoss move.w (a1,d0.w),d2
move.w d2,n_wantedperiod(a6)
cmp.w n_period(a6),d2
sle n_toneportdirec(a6)
bne.s mt_nclrtonepor
clr.w n_wantedperiod(a6)
mt_nclrtonepor rts
mt_tonepor move.b n_cmdlo(a6),d0
beq.s mt_tonepornchg
move.b d0,n_toneportspeed(a6)
mt_tonepornchg lea n_wantedperiod(a6),a0
lea n_period(a6),a1
tst.w (a0)
beq.s mt_nclrtonepor
moveq #0,d0
move.b n_toneportspeed(a6),d0
tst.b n_toneportdirec(a6)
bne.s mt_toneporup
add.w d0,(a1)
move.w (a0),d0
cmp.w (a1),d0
bgt.s mt_toneporstper
move.w (a0),(a1)
clr.w (a0)
bra.s mt_toneporstper
mt_toneporup sub.w d0,(a1)
move.w (a0),d0
cmp.w (a1),d0
blt.s mt_toneporstper
move.w (a0),(a1)
clr.w (a0)
mt_toneporstper move.w (a1),d2
move.b n_glissfunk(a6),d0
and.b d7,d0
beq.s mt_glissskip
moveq #0,d0
move.b n_finetune(a6),d0
moveq #36*2,d6
mulu.w d6,d0
lea mt_periodtab-mt_base(a4),a0
add.l d0,a0
moveq #0,d0
mt_glissloop cmp.w (a0,d0.w),d2
bge.s mt_glissfound
addq.w #2,d0
cmp.w d6,d0
blt.s mt_glissloop
moveq #35*2,d0
mt_glissfound move.w (a0,d0.w),d2
mt_glissskip move.w d2,6(a5)
rts
mt_vibrato move.b n_cmdlo(a6),d0
beq.s mt_vib2
move.b n_vibratocmd(a6),d2
and.b d7,d0
beq.s mt_vibskip
and.b d5,d2
or.b d0,d2
mt_vibskip move.b n_cmdlo(a6),d0
and.b d5,d0
beq.s mt_vibskip2
and.b d7,d2
or.b d0,d2
mt_vibskip2 move.b d2,n_vibratocmd(a6)
mt_vib2 move.b n_vibratopos(a6),d0
lea mt_vibtab-mt_base(a4),a3
lsr.w #2,d0
and.w #$001F,d0
moveq #0,d2
move.b n_wavecontrol(a6),d2
and.b #3,d2
beq.s mt_vibsine
lsl.b #3,d0
subq.b #1,d2
beq.s mt_vibrampdown
st d2
bra.s mt_vibset
mt_vibrampdown tst.b n_vibratopos(a6)
bpl.s mt_vibrampdown2
st d2
sub.b d0,d2
bra.s mt_vibset
mt_vibrampdown2 move.b d0,d2
bra.s mt_vibset
mt_vibsine move.b (a3,d0.w),d2
mt_vibset move.b n_vibratocmd(a6),d0
and.w #$000F,d0
mulu.w d0,d2
lsr.w #7,d2
move.w n_period(a6),d0
tst.b n_vibratopos(a6)
bmi.s mt_vibneg
add.w d2,d0
bra.s mt_vib3
mt_vibneg sub.w d2,d0
mt_vib3 move.w d0,6(a5)
move.b n_vibratocmd(a6),d0
lsr.w #2,d0
and.b #$3C,d0
add.b d0,n_vibratopos(a6)
rts
mt_tonevolslide pea mt_volumeslide-mt_base(a4)
bra mt_tonepornchg
mt_vibvolslide pea mt_volumeslide-mt_base(a4)
bra.s mt_vib2
mt_tremolo move.b n_cmdlo(a6),d0
beq.s mt_trem2
move.b n_tremolocmd(a6),d2
and.b d7,d0
beq.s mt_tremskip
and.b d5,d2
or.b d0,d2
mt_tremskip move.b n_cmdlo(a6),d0
and.b d5,d0
beq.s mt_tremskip2
and.b d7,d2
or.b d0,d2
mt_tremskip2 move.b d2,n_tremolocmd(a6)
mt_trem2 move.b n_tremolopos(a6),d0
lea mt_vibtab-mt_base(a4),a3
lsr.w #2,d0
and.w #$001F,d0
moveq #0,d2
move.b n_wavecontrol(a6),d2
lsr.b #4,d2
and.b #3,d2
beq.s mt_tremsine
lsl.b #3,d0
subq.b #1,d2
beq.s mt_tremrmpdwn
st d2
bra.s mt_tremset
mt_tremrmpdwn tst.b n_vibratopos(a6)
bpl.s mt_tremrmpdwn2
st d2
sub.b d0,d2
bra.s mt_tremset
mt_tremrmpdwn2 move.b d0,d2
bra.s mt_tremset
mt_tremsine move.b (a3,d0.w),d2
mt_tremset move.b n_tremolocmd(a6),d0
and.w #$000F,d0
mulu.w d0,d2
lsr.w #6,d2
moveq #0,d0
move.b n_volume(a6),d0
tst.b n_tremolopos(a6)
bmi.s mt_tremneg
add.w d2,d0
bra.s mt_trem3
mt_tremneg sub.w d2,d0
mt_trem3 bpl.s mt_tremskip3
moveq #0,d0
mt_tremskip3 moveq #64,d6
cmp.w d6,d0
bls.s mt_tremok
move.b d6,d0
mt_tremok move.w d0,8(a5)
move.b n_tremolocmd(a6),d0
lsr.w #2,d0
and.b #$3C,d0
add.b d0,n_tremolopos(a6)
rts
mt_sampoff moveq #0,d0
move.b n_cmdlo(a6),d0
beq.s mt_sononew
move.b d0,n_sampleoffset(a6)
mt_sononew move.b n_sampleoffset(a6),d0
lsl.w #7,d0
cmp.w n_length(a6),d0
bge.s mt_sofskip
sub.w d0,n_length(a6)
add.w d0,d0
add.l d0,n_start(a6)
rts
mt_sofskip moveq #1,d0
move.w d0,n_length(a6)
rts
mt_volumeslide moveq #0,d0
move.b n_cmdlo(a6),d0
lsr.b #4,d0
beq.s mt_volslidedown
mt_volslideup add.b d0,n_volume(a6)
moveq #64,d6
cmp.b n_volume(a6),d6
bpl.s mt_vsuskip
move.b d6,n_volume(a6)
mt_vsuskip move.b n_volume(a6),d0
move.w d0,8(a5)
rts
mt_volslidedown moveq #0,d0
move.b n_cmdlo(a6),d0
and.b d7,d0
mt_volslidedown2 sub.b d0,n_volume(a6)
bpl.s mt_vsdskip
clr.b n_volume(a6)
mt_vsdskip move.b n_volume(a6),d0
move.w d0,8(a5)
rts
mt_posjump move.b n_cmdlo(a6),d0
subq.b #1,d0
move.b d0,mt_songpos-mt_base(a4)
mt_pj2 clr.b mt_breakpos-mt_base(a4)
st mt_jmpflg-mt_base(a4)
rts
mt_volchange moveq #0,d0
move.b n_cmdlo(a6),d0
moveq #64,d6
cmp.b d6,d0
bls.s mt_setvol
move.b d6,d0
mt_setvol move.b d0,n_volume(a6)
move.w d0,8(a5)
rts
mt_pattbreak moveq #0,d0
move.b n_cmdlo(a6),d0
move.l d0,d2
lsr.b #4,d0
move.w d0,d6
lsl.w #3,d0
add.w d6,d0
add.w d6,d0
and.b d7,d2
add.b d2,d0
moveq #63,d6
cmp.b d6,d0
bhi.s mt_pj2
move.b d0,mt_breakpos-mt_base(a4)
st mt_jmpflg-mt_base(a4)
rts
mt_checkefx2 bsr mt_updatefunk
move.b n_cmd(a6),d0
and.b d7,d0
moveq #9,d6
sub.b d6,d0
beq mt_sampoff
subq.b #2,d0
beq.s mt_posjump
subq.b #1,d0
beq.s mt_volchange
subq.b #1,d0
beq.s mt_pattbreak
subq.b #1,d0
beq.s mt_ecomms
IFEQ NO_TEMPO
subq.b #1,d0
bne mt_periodnop
move.b n_cmdlo(a6),d0
beq.s mt_nospeed
IFEQ NO_MINMAX
moveq #TEMPO_MIN,d6
cmp.b d6,d0
blt.s mt_nospeed
moveq #TEMPO_MAX,d6
cmp.b d6,d0
bgt.s mt_nospeed
ENDC
clr.b mt_counter-mt_base(a4)
move.b d0,mt_speed-mt_base(a4)
mt_nospeed rts
ENDC
IFNE NO_TEMPO
bra mt_periodnop
ENDC
mt_ecomms moveq #0,d6
move.b n_cmdlo(a6),d6
lsr.b #4,d6
moveq #15,d2
cmp.b d2,d6
bgt.s mt_notused
add.w d6,d6
lea mt_jumptable-mt_base(a4),a2
move.w (a2,d6.w),d6
jmp (a2,d6.w)
mt_jumptable dc.w mt_togfilter-mt_jumptable
dc.w mt_fineporup-mt_jumptable
dc.w mt_finepordown-mt_jumptable
dc.w mt_stglissctrl-mt_jumptable
dc.w mt_stvibctrl-mt_jumptable
dc.w mt_stfinetune-mt_jumptable
dc.w mt_jumploop-mt_jumptable
dc.w mt_sttremctrl-mt_jumptable
dc.w mt_notused-mt_jumptable
dc.w mt_retrignote-mt_jumptable
dc.w mt_volfineup-mt_jumptable
dc.w mt_volfinedown-mt_jumptable
dc.w mt_notecut-mt_jumptable
dc.w mt_notedelay-mt_jumptable
dc.w mt_pattdelay-mt_jumptable
dc.w mt_funkit-mt_jumptable
mt_togfilter move.b n_cmdlo(a6),d0
and.b #1,d0
add.b d0,d0
and.b #$FD,$BFE001
or.b d0,$BFE001
mt_notused rts
mt_stglissctrl move.b n_cmdlo(a6),d0
and.b d7,d0
and.b d5,n_glissfunk(a6)
or.b d0,n_glissfunk(a6)
rts
mt_stvibctrl move.b n_cmdlo(a6),d0
and.b d7,d0
and.b d5,n_wavecontrol(a6)
or.b d0,n_wavecontrol(a6)
rts
mt_stfinetune move.b n_cmdlo(a6),d0
and.b d7,d0
move.b d0,n_finetune(a6)
rts
mt_jumploop tst.b mt_counter-mt_base(a4)
bne.s mt_nojploop
move.b n_cmdlo(a6),d0
and.b d7,d0
beq.s mt_setloop
tst.b n_loopcount(a6)
beq.s mt_jmpcnt
subq.b #1,n_loopcount(a6)
beq.s mt_nojploop
mt_jmploop move.b n_pattpos(a6),mt_breakpos-mt_base(a4)
st mt_break-mt_base(a4)
mt_nojploop rts
mt_jmpcnt move.b d0,n_loopcount(a6)
bra.s mt_jmploop
mt_setloop move.w mt_pattpos-mt_base(a4),d0
lsr.w #4,d0
move.b d0,n_pattpos(a6)
rts
mt_sttremctrl move.b n_cmdlo(a6),d0
lsl.b #4,d0
and.b d7,n_wavecontrol(a6)
or.b d0,n_wavecontrol(a6)
rts
mt_retrignote moveq #0,d0
move.b n_cmdlo(a6),d0
and.b d7,d0
beq.s mt_rtnend
moveq #0,d1
move.b mt_counter-mt_base(a4),d1
bne.s mt_rtnskip
move.w (a6),d2
and.w #$0FFF,d2
bne.s mt_rtnend
mt_rtnskip divu.w d0,d1
swap d1
tst.w d1
bne.s mt_rtnend
mt_retrig move.w n_dmabit(a6),$DFF096
move.l n_start(a6),(a5)
move.w n_length(a6),4(a5)
bsr mt_dmawait
move.w n_dmabit(a6),d0
or.w #$8000,d0
move.w d0,$DFF096
bsr mt_dmawait
move.l n_loopstart(a6),(a5)
move.l n_replen(a6),4(a5)
mt_rtnend rts
mt_volfineup tst.b mt_counter-mt_base(a4)
bne.s mt_rts2
moveq #0,d0
move.b n_cmdlo(a6),d0
and.b d7,d0
bra mt_volslideup
mt_volfinedown tst.b mt_counter-mt_base(a4)
bne.s mt_rts2
moveq #0,d0
move.b n_cmdlo(a6),d0
and.b d7,d0
bra mt_volslidedown2
mt_notecut move.b n_cmdlo(a6),d0
and.b d7,d0
cmp.b mt_counter-mt_base(a4),d0
bne.s mt_rts2
clr.b n_volume(a6)
clr.w 8(a5)
rts
mt_notedelay move.b n_cmdlo(a6),d0
and.b d7,d0
cmp.b mt_counter-mt_base(a4),d0
bne.s mt_rts2
tst.w (a6)
bne.s mt_retrig
rts
mt_pattdelay tst.b mt_counter-mt_base(a4)
bne.s mt_rts2
tst.b mt_patdeltime2-mt_base(a4)
bne.s mt_rts2
move.b n_cmdlo(a6),d0
and.b d7,d0
addq.b #1,d0
move.b d0,mt_patdeltime-mt_base(a4)
mt_rts2 rts
mt_funkit tst.b mt_counter-mt_base(a4)
bne.s mt_rts2
and.b d7,n_glissfunk(a6)
move.b n_cmdlo(a6),d0
lsl.b #4,d0
beq.s mt_rts2
or.b d0,n_glissfunk(a6)
mt_updatefunk moveq #0,d0
move.b n_glissfunk(a6),d0
lsr.b #4,d0
beq.s mt_rts2
lea n_funkoffset(a6),a2
lea mt_funktab-mt_base(a4),a1
move.b (a1,d0.w),d0
add.b d0,(a2)
btst #7,(a2)
beq.s mt_rts2
clr.b (a2)+
move.l n_loopstart(a6),d0
moveq #0,d2
move.w n_replen(a6),d2
add.l d2,d0
add.l d2,d0
move.l (a2),a1
addq.w #1,a1
cmp.l d0,a1
blt.s mt_funkok
move.l n_loopstart(a6),a1
mt_funkok move.l a1,(a2)
not.b (a1)
rts
;*-----------------------------------------------------------------------------
mt_funktab dc.b 0,5,6,7,8,10,11,13,16,19,22,26,32,43,64,128
mt_vibtab dc.b 0,24,49,74,97,120,141,161
dc.b 180,197,212,224,235,244,250,253
dc.b 255,253,250,244,235,224,212,197
dc.b 180,161,141,120,97,74,49,24
mt_periodtab dc.w 856,808,762,720,678,640,604,570,538,508,480,453 ;0
dc.w 428,404,381,360,339,320,302,285,269,254,240,226
dc.w 214,202,190,180,170,160,151,143,135,127,120,113
dc.w 850,802,757,715,674,637,601,567,535,505,477,450 ;1
dc.w 425,401,379,357,337,318,300,284,268,253,239,225
dc.w 213,201,189,179,169,159,150,142,134,126,119,113
dc.w 844,796,752,709,670,632,597,563,532,502,474,447 ;2
dc.w 422,398,376,355,335,316,298,282,266,251,237,224
dc.w 211,199,188,177,167,158,149,141,133,125,118,112
dc.w 838,791,746,704,665,628,592,559,528,498,470,444 ;3
dc.w 419,395,373,352,332,314,296,280,264,249,235,222
dc.w 209,198,187,176,166,157,148,140,132,125,118,111
dc.w 832,785,741,699,660,623,588,555,524,495,467,441 ;4
dc.w 416,392,370,350,330,312,294,278,262,247,233,220
dc.w 208,196,185,175,165,156,147,139,131,124,117,110
dc.w 826,779,736,694,655,619,584,551,520,491,463,437 ;5
dc.w 413,390,368,347,328,309,292,276,260,245,232,219
dc.w 206,195,184,174,164,155,146,138,130,123,116,109
dc.w 820,774,730,689,651,614,580,547,516,487,460,434 ;6
dc.w 410,387,365,345,325,307,290,274,258,244,230,217
dc.w 205,193,183,172,163,154,145,137,129,122,115,109
dc.w 814,768,725,684,646,610,575,543,513,484,457,431 ;7
dc.w 407,384,363,342,323,305,288,272,256,242,228,216
dc.w 204,192,181,171,161,152,144,136,128,121,114,108
dc.w 907,856,808,762,720,678,640,604,570,538,508,480 ;-8
dc.w 453,428,404,381,360,339,320,302,285,269,254,240