*****************************************
* Pro-Packer v1.0 Replay-Routine.	*
* Based upon the PT1.1B-Replayer	*
* by Lars 'ZAP' Hamre/Amiga Freelancers.*
* Modified by Estrup/Static Bytes.	*
* NB! This replayer uses Lev6-Interrupt.*
*****************************************

mt_init	LEA	mt_data,A0
	MOVE.L	A0,mt_SongDataPtr
	LEA	250(A0),A1
	MOVE.W	#511,D0
	MOVEQ	#0,D1
mtloop	MOVE.L	D1,D2
	SUBQ.W	#1,D0
mtloop2	MOVE.B	(A1)+,D1
	CMP.W	D2,D1
	BGT.S	mtloop
	DBRA	D0,mtloop2
	ADDQ	#1,D2
			
	LEA	mt_SampleStarts(PC),A1
	MULU	#256,D2
	ADD.L	#762,D2
	ADD.L	A0,D2
	MOVE.L	D2,A2
	MOVEQ	#30,D0
mtloop3	CLR.L	(A2)
	MOVE.L	A2,(A1)+
	MOVEQ	#0,D1
	MOVE.W	(A0),D1
	ADD.L	D1,D1
	ADD.L	D1,A2
	LEA	8(A0),A0
	DBRA	D0,mtloop3

	OR.B	#2,$BFE001
	MOVE.B	#6,mt_speed
	CLR.B	mt_counter
	CLR.B	mt_SongPos
	CLR.W	mt_PatternPos
mt_end	LEA	$DFF096,A0
	CLR.W	$12(A0)
	CLR.W	$22(A0)
	CLR.W	$32(A0)
	CLR.W	$42(A0)
	MOVE.W	#$F,(A0)
	RTS

mt_music
	MOVEM.L	D0-D4/A0-A6,-(SP)
	ADDQ.B	#1,mt_counter
	MOVE.B	mt_counter(PC),D0
	CMP.B	mt_speed(PC),D0
	BLO.S	mt_NoNewNote
	CLR.B	mt_counter
	TST.B	mt_PattDelTime2
	BEQ.S	mt_GetNewNote
	BSR.S	mt_NoNewAllChannels
	BRA.W	mt_dskip

mt_NoNewNote
	BSR.S	mt_NoNewAllChannels
	BRA.W	mt_NoNewPosYet

mt_NoNewAllChannels
	LEA	$DFF090,A5
	LEA	mt_chan1temp-44(PC),A6
	BSR.W	mt_CheckEfx
	BSR.W	mt_CheckEfx
	BSR.W	mt_CheckEfx
	BRA.W	mt_CheckEfx

mt_GetNewNote
	MOVE.L	mt_SongDataPtr(PC),A0
	LEA	(A0),A3
	LEA	122(A0),A2	;pattpo
	LEA	762(A0),A0	;patterndata
	CLR.W	mt_DMACONtemp

	LEA	$DFF090,A5
	LEA	mt_chan1temp-44(PC),A6
	BSR.S	mt_DoVoice
	BSR.S	mt_DoVoice
	BSR.B	mt_DoVoice
	BSR.B	mt_DoVoice
	BRA.W	mt_SetDMA

mt_DoVoice
	MOVEQ	#0,D0
	MOVEQ	#0,D1
	MOVE.B	mt_SongPos(PC),D0
	LEA	128(A2),A2
	MOVE.B	(A2,D0.W),D1
	ASL	#8,D1
	ADD.W	mt_PatternPos(PC),D1
	LEA	$10(A5),A5
	LEA	44(A6),A6

	TST.L	(A6)
	BNE.S	mt_plvskip
	BSR.W	mt_PerNop
mt_plvskip
	MOVE.L	(A0,D1.W),(A6)
	MOVE.B	2(A6),D2
	AND.L	#$F0,D2
	LSR.B	#4,D2
	MOVE.B	(A6),D0
	AND.B	#$F0,D0
	OR.B	D0,D2
	BEQ.B	mt_SetRegs
	MOVEQ	#0,D3
	LEA	mt_SampleStarts(PC),A1
	SUBQ	#1,D2
	MOVE	D2,D4
	ADD	D2,D2
	ADD	D2,D2
	ASL	#3,D4
	MOVE.L	(A1,D2.L),4(A6)
	MOVE.W	(A3,D4.W),8(A6)
	MOVE.W	(A3,D4.W),40(A6)
	MOVE.W	2(A3,D4.W),18(A6)
	MOVE.L	4(A6),D2	; Get start
	MOVE.W	4(A3,D4.L),D3	; Get repeat
	BEQ.S	mt_NoLoop
	MOVE.W	D3,D0		; Get repeat
	ADD.W	D3,D3
	ADD.L	D3,D2		; Add repeat
	ADD.W	6(A3,D4.L),D0	; Add replen
	MOVE.W	D0,8(A6)

mt_NoLoop
	MOVE.L	D2,10(A6)
	MOVE.L	D2,36(A6)
	MOVE.W	6(A3,D4.L),14(A6)	; Save replen
	MOVE.B	19(A6),9(A5)	; Set volume
mt_SetRegs
	MOVE.W	(A6),D0
	AND.W	#$0FFF,D0
	BEQ.W	mt_CheckMoreEfx	; If no note
	MOVE.W	2(A6),D0
	AND.W	#$0FF0,D0
	CMP.W	#$0E50,D0
	BEQ.S	mt_DoSetFineTune
	MOVE.B	2(A6),D0
	AND.B	#$0F,D0
	CMP.B	#3,D0	; TonePortamento
	BEQ.S	mt_ChkTonePorta
	CMP.B	#5,D0
	BEQ.S	mt_ChkTonePorta
	CMP.B	#9,D0	; Sample Offset
	BNE.S	mt_SetPeriod
	BSR.W	mt_CheckMoreEfx
	BRA.S	mt_SetPeriod

mt_ChkTonePorta
	BSR.W	mt_SetTonePorta
	BRA.W	mt_CheckMoreEfx

mt_DoSetFineTune
	BSR.W	mt_SetFineTune

mt_SetPeriod
	MOVEM.L	D1/A1,-(SP)
	MOVE.W	(A6),D1
	AND.W	#$0FFF,D1
	LEA	mt_PeriodTable(PC),A1
	MOVEQ	#36,D7
mt_ftuloop
	CMP.W	(A1)+,D1
	BHS.S	mt_ftufound
	DBRA	D7,mt_ftuloop
mt_ftufound
	MOVEQ	#0,D1
	MOVE.B	18(A6),D1
	ASL	#3,D1
	MOVE	D1,D0
	ASL	#3,D1
	ADD	D0,D1
	MOVE.W	-2(A1,D1.W),16(A6)
	MOVEM.L	(SP)+,D1/A1

	MOVE.W	2(A6),D0
	AND.W	#$0FF0,D0
	CMP.W	#$0ED0,D0 ; Notedelay
	BEQ.W	mt_CheckMoreEfx

	MOVE.W	20(A6),$DFF096
	BTST	#2,30(A6)
	BNE.S	mt_vibnoc
	CLR.B	27(A6)
mt_vibnoc
	BTST	#6,30(A6)
	BNE.S	mt_trenoc
	CLR.B	29(A6)
mt_trenoc
	MOVE.L	4(A6),(A5)	; Set start
	MOVE.W	8(A6),4(A5)	; Set length
	MOVE.W	16(A6),6(A5)	; Set period
	MOVE.W	20(A6),D0
	OR.W	D0,mt_DMACONtemp
	BRA.W	mt_CheckMoreEfx
 
mt_SetDMA
	lea	$bfd000,a3
	move.b	#$7f,$d00(a3)
	move.w	#$2000,$dff09c
	move.w	#$a000,$dff09a
	move.l	$78.w,mt_oldirq
	move.l	#mt_irq1,$78.w
	moveq	#0,d0
	move.b	d0,$e00(a3)
	move.b	#$a8,$400(a3)
	move.b	d0,$500(a3)
	move.b	#$11,$e00(a3)
	move.b	#$81,$d00(a3)
	OR.W	#$8000,mt_DMACONtemp
	bra.w	mt_dskip

mt_irq1:tst.b	$bfdd00
	MOVE.W	mt_dmacontemp(pc),$DFF096
	move.w	#$2000,$dff09c
	move.l	#mt_irq2,$78.w
	rte

mt_irq2:tst.b	$bfdd00
	movem.l	a5-a6,-(a7)
	LEA	$DFF0A0,A5
	LEA	mt_chan1temp(PC),A6
	MOVE.L	10(A6),(A5)
	MOVE.W	14(A6),4(A5)
	MOVE.L	54(A6),$10(A5)
	MOVE.W	58(A6),$14(A5)
	MOVE.L	98(A6),$20(A5)
	MOVE.W	102(A6),$24(A5)
	MOVE.L	142(A6),$30(A5)
	MOVE.W	146(A6),$34(A5)
	move.b	#0,$bfde00
	move.b	#$7f,$bfdd00
	move.l	mt_oldirq(pc),$78.w
	move.w	#$2000,$dff09c
	movem.l	(a7)+,a5-a6
	rte

mt_dskip
	LEA	mt_PattDelTime(PC),A4
	ADDQ.W	#4,3(A4)
	MOVE.B	(A4),D0
	BEQ.S	mt_dskc
	MOVE.B	D0,(A4)
	CLR.B	(A4)
mt_dskc	TST.B	1(A4)
	BEQ.S	mt_dska
	SUBQ.B	#1,1(A4)
	BEQ.S	mt_dska
	SUBQ.W	#4,3(A4)
mt_dska	TST.B	mt_PBreakFlag
	BEQ.S	mt_nnpysk
	SF	mt_PBreakFlag
	MOVEQ	#0,D0
	MOVE.B	mt_PBreakPos(PC),D0
	CLR.B	mt_PBreakPos
	LSL	#2,D0
	MOVE.W	D0,3(A4)
mt_nnpysk
	CMP.W	#256,3(A4)
	BLO.S	mt_NoNewPosYet
mt_NextPosition	
	MOVEQ	#0,D0
	MOVE.B	mt_PBreakPos(PC),D0
	LSL	#2,D0
	MOVE.W	D0,3(A4)
	CLR.B	mt_PBreakPos
	CLR.B	mt_PosJumpFlag
	ADDQ.B	#1,mt_SongPos
	AND.B	#$7F,mt_SongPos
	MOVE.B	mt_SongPos(PC),D1
	MOVE.L	mt_SongDataPtr(PC),A0
	CMP.B	248(A0),D1
	BLO.S	mt_NoNewPosYet
	CLR.B	mt_SongPos
mt_NoNewPosYet	
	TST.B	mt_PosJumpFlag
	BNE.S	mt_NextPosition
	MOVEM.L	(SP)+,D0-D4/A0-A6
	RTS

mt_CheckEfx
	LEA	$10(A5),A5
	LEA	44(A6),A6
	BSR.W	mt_UpdateFunk
	MOVE.W	2(A6),D0
	AND.W	#$0FFF,D0
	BEQ.S	mt_PerNop
	MOVE.B	2(A6),D0
	AND.W	#$0F,D0
	BEQ.S	mt_Arpeggio
	SUBQ	#1,D0
	BEQ.W	mt_PortaUp
	SUBQ	#1,D0
	BEQ.W	mt_PortaDown
	SUBQ	#1,D0
	BEQ.W	mt_TonePortamento
	SUBQ	#1,D0
	BEQ.W	mt_Vibrato
	SUBQ	#1,D0
	BEQ.W	mt_TonePlusVolSlide
	SUBQ	#1,D0
	BEQ.W	mt_VibratoPlusVolSlide
	SUBQ	#8,D0
	BEQ.W	mt_E_Commands
SetBack	MOVE.W	16(A6),6(A5)
	ADDQ	#7,D0
	BEQ.W	mt_Tremolo
	SUBQ	#3,D0
	BEQ.W	mt_VolumeSlide
mt_Return2
	RTS

mt_PerNop
	MOVE.W	16(A6),6(A5)
	RTS

mt_Arpeggio
	MOVEQ	#0,D0
	MOVE.B	mt_counter(PC),D0
	DIVS	#3,D0
	SWAP	D0
	TST.W	D0
	BEQ.S	mt_Arpeggio2
	SUBQ	#2,D0
	BEQ.S	mt_Arpeggio1
	MOVEQ	#0,D0
	MOVE.B	3(A6),D0
	LSR.B	#4,D0
	BRA.S	mt_Arpeggio3

mt_Arpeggio2
	MOVE.W	16(A6),6(A5)
	RTS

mt_Arpeggio1
	MOVE.B	3(A6),D0
	AND.W	#15,D0
mt_Arpeggio3
	ADD.W	D0,D0
	MOVEQ	#0,D1
	MOVE.B	18(A6),D1
	ASL	#3,D1
	MOVE	D1,D2
	ASL	#3,D1
	ADD	D2,D1
	LEA	mt_PeriodTable(PC),A0
	ADD.L	D1,A0
	MOVE.W	16(A6),D1
	MOVEQ	#36,D7
mt_arploop
	CMP.W	(A0)+,D1
	BHS.S	mt_Arpeggio4
	DBRA	D7,mt_arploop
	RTS

mt_Arpeggio4
	MOVE.W	-2(A0,D0.W),6(A5)
	RTS

mt_FinePortaUp
	TST.B	mt_counter
	BNE.S	mt_Return2
	MOVE.B	#$0F,mt_LowMask
mt_PortaUp
	MOVEQ	#0,D0
	MOVE.B	3(A6),D0
	AND.B	mt_LowMask(PC),D0
	MOVE.B	#$FF,mt_LowMask
	SUB.W	D0,16(A6)
	MOVE.W	16(A6),D0
	AND.W	#$0FFF,D0
	CMP.W	#113,D0
	BPL.S	mt_PortaUskip
	AND.W	#$F000,16(A6)
	OR.W	#113,16(A6)
mt_PortaUskip
	MOVE.W	16(A6),D0
	AND.W	#$0FFF,D0
	MOVE.W	D0,6(A5)
	RTS	
 
mt_FinePortaDown
	TST.B	mt_counter
	BNE.W	mt_Return2
	MOVE.B	#$0F,mt_LowMask
mt_PortaDown
	CLR.W	D0
	MOVE.B	3(A6),D0
	AND.B	mt_LowMask(PC),D0
	MOVE.B	#$FF,mt_LowMask
	ADD.W	D0,16(A6)
	MOVE.W	16(A6),D0
	AND.W	#$0FFF,D0
	CMP.W	#856,D0
	BMI.S	mt_PortaDskip
	AND.W	#$F000,16(A6)
	OR.W	#856,16(A6)
mt_PortaDskip
	MOVE.W	16(A6),D0
	AND.W	#$0FFF,D0
	MOVE.W	D0,6(A5)
	RTS

mt_SetTonePorta
	MOVEM.L	A0,-(SP)
	MOVE.W	(A6),D2
	AND.W	#$0FFF,D2
	MOVEQ	#0,D0
	MOVE.B	18(A6),D0
	ADD	D0,D0
	MOVE	D0,D7
	ADD	D0,D0
	ADD	D0,D0
	ADD	D0,D7
	ASL	#3,D0
	ADD	D7,D0
	LEA	mt_PeriodTable(PC),A0
	ADD.L	D0,A0
	MOVEQ	#0,D0
mt_StpLoop
	CMP.W	(A0,D0.W),D2
	BHS.S	mt_StpFound
	ADDQ	#2,D0
	CMP.W	#37*2,D0
	BLO.S	mt_StpLoop
	MOVEQ	#35*2,D0
mt_StpFound
	BTST	#3,18(A6)
	BEQ.S	mt_StpGoss
	TST.W	D0
	BEQ.S	mt_StpGoss
	SUBQ	#2,D0
mt_StpGoss
	MOVE.W	(A0,D0.W),D2
	MOVE.L	(SP)+,A0
	MOVE.W	D2,24(A6)
	MOVE.W	16(A6),D0
	CLR.B	22(A6)
	CMP.W	D0,D2
	BEQ.S	mt_ClearTonePorta
	BGE.W	mt_Return2
	MOVE.B	#1,22(A6)
	RTS

mt_ClearTonePorta
	CLR.W	24(A6)
	RTS

mt_TonePortamento
	MOVE.B	3(A6),D0
	BEQ.S	mt_TonePortNoChange
	MOVE.B	D0,23(A6)
	CLR.B	3(A6)
mt_TonePortNoChange
	TST.W	24(A6)
	BEQ.W	mt_Return2
	MOVEQ	#0,D0
	MOVE.B	23(A6),D0
	TST.B	22(A6)
	BNE.S	mt_TonePortaUp
mt_TonePortaDown
	ADD.W	D0,16(A6)
	MOVE.W	24(A6),D0
	CMP.W	16(A6),D0
	BGT.S	mt_TonePortaSetPer
	MOVE.W	24(A6),16(A6)
	CLR.W	24(A6)
	BRA.S	mt_TonePortaSetPer

mt_TonePortaUp
	SUB.W	D0,16(A6)
	MOVE.W	24(A6),D0
	CMP.W	16(A6),D0
	BLT.S	mt_TonePortaSetPer
	MOVE.W	24(A6),16(A6)
	CLR.W	24(A6)

mt_TonePortaSetPer
	MOVE.W	16(A6),D2
	MOVE.B	31(A6),D0
	AND.B	#$0F,D0
	BEQ.S	mt_GlissSkip
	MOVEQ	#0,D0
	MOVE.B	18(A6),D0
	ASL	#3,D0
	MOVE	D0,D1
	ASL	#3,D0
	ADD	D1,D0
	LEA	mt_PeriodTable(PC),A0
	ADD.L	D0,A0
	MOVEQ	#0,D0
mt_GlissLoop
	CMP.W	(A0,D0.W),D2
	BHS.S	mt_GlissFound
	ADDQ	#2,D0
	CMP.W	#36*2,D0
	BLO.S	mt_GlissLoop
	MOVEQ	#35*2,D0
mt_GlissFound
	MOVE.W	(A0,D0.W),D2
mt_GlissSkip
	MOVE.W	D2,6(A5) ; Set period
	RTS

mt_Vibrato
	MOVE.B	3(A6),D0
	BEQ.S	mt_Vibrato2
	MOVE.B	26(A6),D2
	AND.B	#$0F,D0
	BEQ.S	mt_vibskip
	AND.B	#$F0,D2
	OR.B	D0,D2
mt_vibskip
	MOVE.B	3(A6),D0
	AND.B	#$F0,D0
	BEQ.S	mt_vibskip2
	AND.B	#$0F,D2
	OR.B	D0,D2
mt_vibskip2
	MOVE.B	D2,26(A6)
mt_Vibrato2
	MOVE.B	27(A6),D0
	LEA	mt_VibratoTable(PC),A4
	LSR.W	#2,D0
	AND.W	#$001F,D0
	MOVE.B	30(A6),D2
	AND.W	#$03,D2
	BEQ.S	mt_vib_sine
	LSL.B	#3,D0
	CMP.B	#1,D2
	BEQ.S	mt_vib_rampdown
	MOVE.B	#255,D2
	BRA.S	mt_vib_set
mt_vib_rampdown
	TST.B	27(A6)
	BPL.S	mt_vib_rampdown2
	MOVE.B	#255,D2
	SUB.B	D0,D2
	BRA.S	mt_vib_set
mt_vib_rampdown2
	MOVE.B	D0,D2
	BRA.S	mt_vib_set
mt_vib_sine
	MOVE.B	0(A4,D0.W),D2
mt_vib_set
	MOVE.B	26(A6),D0
	AND.W	#15,D0
	MULU	D0,D2
	LSR.W	#7,D2
	MOVE.W	16(A6),D0
	TST.B	27(A6)
	BMI.S	mt_VibratoNeg
	ADD.W	D2,D0
	BRA.S	mt_Vibrato3
mt_VibratoNeg
	SUB.W	D2,D0
mt_Vibrato3
	MOVE.W	D0,6(A5)
	MOVE.B	26(A6),D0
	LSR.W	#2,D0
	AND.W	#$003C,D0
	ADD.B	D0,27(A6)
	RTS

mt_TonePlusVolSlide
	BSR.W	mt_TonePortNoChange
	BRA.W	mt_VolumeSlide

mt_VibratoPlusVolSlide
	BSR.S	mt_Vibrato2
	BRA.W	mt_VolumeSlide

mt_Tremolo
	MOVE.B	3(A6),D0
	BEQ.S	mt_Tremolo2
	MOVE.B	28(A6),D2
	AND.B	#$0F,D0
	BEQ.S	mt_treskip
	AND.B	#$F0,D2
	OR.B	D0,D2
mt_treskip
	MOVE.B	3(A6),D0
	AND.B	#$F0,D0
	BEQ.S	mt_treskip2
	AND.B	#$0F,D2
	OR.B	D0,D2
mt_treskip2
	MOVE.B	D2,28(A6)
mt_Tremolo2
	MOVE.B	29(A6),D0
	LEA	mt_VibratoTable(PC),A4
	LSR.W	#2,D0
	AND.W	#$001F,D0
	MOVEQ	#0,D2
	MOVE.B	30(A6),D2
	LSR.B	#4,D2
	AND.B	#$03,D2
	BEQ.S	mt_tre_sine
	LSL.B	#3,D0
	CMP.B	#1,D2
	BEQ.S	mt_tre_rampdown
	MOVE.B	#255,D2
	BRA.S	mt_tre_set
mt_tre_rampdown
	TST.B	27(A6)
	BPL.S	mt_tre_rampdown2
	MOVE.B	#255,D2
	SUB.B	D0,D2
	BRA.S	mt_tre_set
mt_tre_rampdown2
	MOVE.B	D0,D2
	BRA.S	mt_tre_set
mt_tre_sine
	MOVE.B	0(A4,D0.W),D2
mt_tre_set
	MOVE.B	28(A6),D0
	AND.W	#15,D0
	MULU	D0,D2
	LSR.W	#6,D2
	MOVEQ	#0,D0
	MOVE.B	19(A6),D0
	TST.B	29(A6)
	BMI.S	mt_TremoloNeg
	ADD.W	D2,D0
	BRA.S	mt_Tremolo3
mt_TremoloNeg
	SUB.W	D2,D0
mt_Tremolo3
	BPL.S	mt_TremoloSkip
	CLR.W	D0
mt_TremoloSkip
	CMP.W	#$40,D0
	BLS.S	mt_TremoloOk
	MOVE.W	#$40,D0
mt_TremoloOk
	MOVE.W	D0,8(A5)
	MOVE.B	28(A6),D0
	LSR.W	#2,D0
	AND.W	#$003C,D0
	ADD.B	D0,29(A6)
	RTS

mt_SampleOffset
	MOVEQ	#0,D0
	MOVE.B	3(A6),D0
	BEQ.S	mt_sononew
	MOVE.B	D0,32(A6)
mt_sononew
	MOVE.B	32(A6),D0
	LSL.W	#7,D0
	CMP.W	8(A6),D0
	BGE.S	mt_sofskip
	SUB.W	D0,8(A6)
	ADD.W	D0,D0
	ADD.L	D0,4(A6)
	RTS
mt_sofskip
	MOVE.W	#$0001,8(A6)
	RTS

mt_VolumeSlide
	MOVEQ	#0,D0
	MOVE.B	3(A6),D0
	LSR.B	#4,D0
	TST.B	D0
	BEQ.S	mt_VolSlideDown
mt_VolSlideUp
	ADD.B	D0,19(A6)
	CMP.B	#$40,19(A6)
	BMI.S	mt_vsuskip
	MOVE.B	#$40,19(A6)
mt_vsuskip
	MOVE.B	19(A6),9(A5)
	RTS

mt_VolSlideDown
	MOVE.B	3(A6),D0
	AND.W	#$0F,D0
mt_VolSlideDown2
	SUB.B	D0,19(A6)
	BPL.S	mt_vsdskip
	CLR.B	19(A6)
mt_vsdskip
	MOVE.B	19(A6),9(A5)
	RTS

mt_PositionJump
	MOVE.B	3(A6),D0
	SUBQ	#1,D0
	MOVE.B	D0,mt_SongPos
mt_pj2	CLR.B	mt_PBreakPos
	ST 	mt_PosJumpFlag
	RTS

mt_VolumeChange
	MOVE.B	3(A6),D0
	CMP.B	#$40,D0
	BLS.S	mt_VolumeOk
	MOVEQ	#$40,D0
mt_VolumeOk
	MOVE.B	D0,19(A6)
	MOVE.B	D0,9(A5)
	RTS

mt_PatternBreak
	MOVEQ	#0,D0
	MOVE.B	3(A6),D0
	MOVE.W	D0,D2
	LSR.B	#4,D0
	ADD	D0,D0
	MOVE	D0,D1
	ADD	D0,D0
	ADD	D0,D0
	ADD	D1,D0
	AND.B	#$0F,D2
	ADD.B	D2,D0
	CMP.B	#63,D0
	BHI.S	mt_pj2
	MOVE.B	D0,mt_PBreakPos
	ST	mt_PosJumpFlag
	RTS

mt_SetSpeed
	MOVE.B	3(A6),D0
	BEQ.W	mt_Return2
	CLR.B	mt_counter
	MOVE.B	D0,mt_speed
	RTS

mt_CheckMoreEfx
	BSR.W	mt_UpdateFunk
	MOVE.B	2(A6),D0
	AND.B	#$0F,D0
	SUB.B	#9,D0
	BEQ.W	mt_SampleOffset
	SUBQ	#2,D0
	BEQ.W	mt_PositionJump
	SUBQ	#1,D0
	BEQ.B	mt_VolumeChange
	SUBQ	#1,D0
	BEQ.S	mt_PatternBreak
	SUBQ	#1,D0
	BEQ.S	mt_E_Commands
	SUBQ	#1,D0
	BEQ.S	mt_SetSpeed
	BRA.W	mt_PerNop

mt_E_Commands
	MOVE.B	3(A6),D0
	AND.W	#$F0,D0
	LSR.B	#4,D0
	BEQ.S	mt_FilterOnOff
	SUBQ	#1,D0
	BEQ.W	mt_FinePortaUp
	SUBQ	#1,D0
	BEQ.W	mt_FinePortaDown
	SUBQ	#1,D0
	BEQ.S	mt_SetGlissControl
	SUBQ	#1,D0
	BEQ.B	mt_SetVibratoControl
	SUBQ	#1,D0
	BEQ.B	mt_SetFineTune
	SUBQ	#1,D0
	BEQ.B	mt_JumpLoop
	SUBQ	#1,D0
	BEQ.W	mt_SetTremoloControl
	SUBQ	#2,D0
	BEQ.W	mt_RetrigNote
	SUBQ	#1,D0
	BEQ.W	mt_VolumeFineUp
	SUBQ	#1,D0
	BEQ.W	mt_VolumeFineDown
	SUBQ	#1,D0
	BEQ.W	mt_NoteCut
	SUBQ	#1,D0
	BEQ.W	mt_NoteDelay
	SUBQ	#1,D0
	BEQ.W	mt_PatternDelay
	BRA.W	mt_FunkIt

mt_FilterOnOff
	MOVE.B	3(A6),D0
	AND.B	#1,D0
	ADD.B	D0,D0
	AND.B	#$FD,$BFE001
	OR.B	D0,$BFE001
	RTS	

mt_SetGlissControl
	MOVE.B	3(A6),D0
	AND.B	#$0F,D0
	AND.B	#$F0,31(A6)
	OR.B	D0,31(A6)
	RTS

mt_SetVibratoControl
	MOVE.B	3(A6),D0
	AND.B	#$0F,D0
	AND.B	#$F0,30(A6)
	OR.B	D0,30(A6)
	RTS

mt_SetFineTune
	MOVE.B	3(A6),D0
	AND.B	#$0F,D0
	MOVE.B	D0,18(A6)
	RTS

mt_JumpLoop
	TST.B	mt_counter
	BNE.W	mt_Return2
	MOVE.B	3(A6),D0
	AND.B	#$0F,D0
	BEQ.S	mt_SetLoop
	TST.B	34(A6)
	BEQ.S	mt_jumpcnt
	SUBQ.B	#1,34(A6)
	BEQ.W	mt_Return2
mt_jmploop 	MOVE.B	33(A6),mt_PBreakPos
	ST	mt_PBreakFlag
	RTS

mt_jumpcnt
	MOVE.B	D0,34(A6)
	BRA.S	mt_jmploop

mt_SetLoop
	MOVE.W	mt_PatternPos(PC),D0
	LSR	#2,D0
	MOVE.B	D0,33(A6)
	RTS

mt_SetTremoloControl
	MOVE.B	3(A6),D0
	AND.B	#$0F,D0
	LSL.B	#4,D0
	AND.B	#$0F,30(A6)
	OR.B	D0,30(A6)
	RTS

mt_RetrigNote
	MOVE.L	D1,-(SP)
	MOVE.B	3(A6),D0
	AND.W	#$0F,D0
	BEQ.S	mt_rtnend
	MOVEQ	#0,d1
	MOVE.B	mt_counter(PC),D1
	BNE.S	mt_rtnskp
	MOVE.W	(A6),D1
	AND.W	#$0FFF,D1
	BNE.S	mt_rtnend
	MOVEQ	#0,D1
	MOVE.B	mt_counter(PC),D1
mt_rtnskp
	DIVU	D0,D1
	SWAP	D1
	TST.W	D1
	BNE.S	mt_rtnend
mt_DoRetrig
	MOVE.W	20(A6),$DFF096	; Channel DMA off
	MOVE.L	4(A6),(A5)	; Set sampledata pointer
	MOVE.W	8(A6),4(A5)	; Set length
	BSR.W	mt_WaitDMA
	MOVE.W	20(A6),D0
	BSET	#15,D0
	MOVE.W	D0,$DFF096
	BSR.W	mt_WaitDMA
	MOVE.L	10(A6),(A5)
	MOVE.L	14(A6),4(A5)
mt_rtnend
	MOVE.L	(SP)+,D1
	RTS

mt_VolumeFineUp
	TST.B	mt_counter
	BNE.W	mt_Return2
	MOVE.B	3(A6),D0
	AND.W	#$F,D0
	BRA.W	mt_VolSlideUp

mt_VolumeFineDown
	TST.B	mt_counter
	BNE.W	mt_Return2
	MOVE.B	3(A6),D0
	AND.W	#$0F,D0
	BRA.W	mt_VolSlideDown2

mt_NoteCut
	MOVE.B	3(A6),D0
	AND.W	#$0F,D0
	CMP.B	mt_counter(PC),D0
	BNE.W	mt_Return2
	CLR.B	19(A6)
	CLR.W	8(A5)
	RTS

mt_NoteDelay
	MOVE.B	3(A6),D0
	AND.W	#$0F,D0
	CMP.B	mt_Counter(PC),D0
	BNE.W	mt_Return2
	MOVE.W	(A6),D0
	BEQ.W	mt_Return2
	MOVE.L	D1,-(SP)
	BRA.W	mt_DoRetrig

mt_PatternDelay
	TST.B	mt_counter
	BNE.W	mt_Return2
	MOVE.B	3(A6),D0
	AND.W	#$0F,D0
	TST.B	mt_PattDelTime2
	BNE.W	mt_Return2
	ADDQ.B	#1,D0
	MOVE.B	D0,mt_PattDelTime
	RTS

mt_FunkIt
	TST.B	mt_counter
	BNE.W	mt_Return2
	MOVE.B	3(A6),D0
	AND.B	#$0F,D0
	LSL.B	#4,D0
	AND.B	#$0F,31(A6)
	OR.B	D0,31(A6)
	TST.B	D0
	BEQ.W	mt_Return2
mt_UpdateFunk
	MOVEM.L	D1/A0,-(SP)
	MOVEQ	#0,D0
	MOVE.B	31(A6),D0
	LSR.B	#4,D0
	BEQ.S	mt_funkend
	LEA	mt_FunkTable(PC),A0
	MOVE.B	(A0,D0.W),D0
	ADD.B	D0,35(A6)
	BTST	#7,35(A6)
	BEQ.S	mt_funkend
	CLR.B	35(A6)

	MOVE.L	10(A6),D0
	MOVEQ	#0,D1
	MOVE.W	14(A6),D1
	ADD.L	D1,D0
	ADD.L	D1,D0
	MOVE.L	36(A6),A0
	ADDQ.L	#1,A0
	CMP.L	D0,A0
	BLO.S	mt_funkok
	MOVE.L	10(A6),A0
mt_funkok
	MOVE.L	A0,36(A6)
	NEG.B	(A0)
	SUBQ.B	#1,(A0)
mt_funkend
	MOVEM.L	(SP)+,D1/A0
	RTS

mt_WaitDMA
	MOVEQ	#3,D0
mt_WaitDMA2
	MOVE.B	$DFF006,D1
mt_WaitDMA3
	CMP.B	$DFF006,D1
	BEQ.S	mt_WaitDMA3
	DBF	D0,mt_WaitDMA2
	RTS

mt_FunkTable dc.b 0,5,6,7,8,10,11,13,16,19,22,26,32,43,64,128

mt_VibratoTable	
	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_PeriodTable
; Tuning 0, Normal
	dc.w	856,808,762,720,678,640,604,570,538,508,480,453
	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
; Tuning 1
	dc.w	850,802,757,715,674,637,601,567,535,505,477,450
	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
; Tuning 2
	dc.w	844,796,752,709,670,632,597,563,532,502,474,447
	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
; Tuning 3
	dc.w	838,791,746,704,665,628,592,559,528,498,470,444
	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
; Tuning 4
	dc.w	832,785,741,699,660,623,588,555,524,495,467,441
	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
; Tuning 5
	dc.w	826,779,736,694,655,619,584,551,520,491,463,437
	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
; Tuning 6
	dc.w	820,774,730,689,651,614,580,547,516,487,460,434
	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
; Tuning 7
	dc.w	814,768,725,684,646,610,575,543,513,484,457,431
	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
; Tuning -8
	dc.w	907,856,808,762,720,678,640,604,570,538,508,480
	dc.w	453,428,404,381,360,339,320,302,285,269,254,240
	dc.w	226,214,202,190,180,170,160,151,143,135,127,120
; Tuning -7
	dc.w	900,850,802,757,715,675,636,601,567,535,505,477
	dc.w	450,425,401,379,357,337,318,300,284,268,253,238
	dc.w	225,212,200,189,179,169,159,150,142,134,126,119
; Tuning -6
	dc.w	894,844,796,752,709,670,632,597,563,532,502,474
	dc.w	447,422,398,376,355,335,316,298,282,266,251,237
	dc.w	223,211,199,188,177,167,158,149,141,133,125,118
; Tuning -5
	dc.w	887,838,791,746,704,665,628,592,559,528,498,470
	dc.w	444,419,395,373,352,332,314,296,280,264,249,235
	dc.w	222,209,198,187,176,166,157,148,140,132,125,118
; Tuning -4
	dc.w	881,832,785,741,699,660,623,588,555,524,494,467
	dc.w	441,416,392,370,350,330,312,294,278,262,247,233
	dc.w	220,208,196,185,175,165,156,147,139,131,123,117
; Tuning -3
	dc.w	875,826,779,736,694,655,619,584,551,520,491,463
	dc.w	437,413,390,368,347,328,309,292,276,260,245,232
	dc.w	219,206,195,184,174,164,155,146,138,130,123,116
; Tuning -2
	dc.w	868,820,774,730,689,651,614,580,547,516,487,460
	dc.w	434,410,387,365,345,325,307,290,274,258,244,230
	dc.w	217,205,193,183,172,163,154,145,137,129,122,115
; Tuning -1
	dc.w	862,814,768,725,684,646,610,575,543,513,484,457
	dc.w	431,407,384,363,342,323,305,288,272,256,242,228
	dc.w	216,203,192,181,171,161,152,144,136,128,121,114

mt_chan1temp	blk.l	5
		dc.w	1
		blk.w	21
		dc.w	2
		blk.w	21
		dc.w	4
		blk.w	21
		dc.w	8
		blk.w	11

mt_SampleStarts	blk.l	31,0

mt_SongDataPtr	dc.l 0
mt_oldirq	dc.l 0

mt_speed	dc.b 6
mt_counter	dc.b 0
mt_SongPos	dc.b 0
mt_PBreakPos	dc.b 0
mt_PosJumpFlag	dc.b 0
mt_PBreakFlag	dc.b 0
mt_LowMask	dc.b 0
mt_PattDelTime	dc.b 0
mt_PattDelTime2	dc.b 0,0
mt_PatternPos	dc.w 0
mt_DMACONtemp	dc.w 0
mt_data: