home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Aminet 2
/
Aminet AMIGA CDROM (1994)(Walnut Creek)[Feb 1994][W.O. 44790-1].iso
/
Aminet
/
mus
/
play
/
MP132src.lha
/
stplay.asm
< prev
next >
Wrap
Assembly Source File
|
1992-09-14
|
13KB
|
623 lines
* MultiPlayer
* Copyright (C) 1992 Bryan Ford
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* I (the author of MultiPlayer) can be contacted on the Internet at
* "bryan.ford@m.cc.utah.edu". See "Player.doc" for other addresses.
*
* Note: This playroutine was not originally written by me. In general
* these playroutines are public domain, so I am bringing the versions
* modified for MultiPlayer under the General Public License. In the
* few cases of already-copyrighted playroutines, the above copyright
* notice applies only to the parts of the file written by me.
*
* $Id: stplay.asm,v 4.1 92/06/21 11:15:03 BAF Exp Locker: BAF $
*
include "player.i"
xref modmem,modend,suppmem
xref getfreqmodspeed,ntgetsongname,ntgetsongauthor,dmawait
xdef ststart
code text
ststart:
plstartret 9$
cnop 0,4
dc.l gmod_Hook
9$ gmodnop
gmodbra mt_init ; StartMusic
gmodnop
gmodnop
gmodnop
gmodq 1 ; ContinueMusic
gmodnop
gmodnop
gmodnop
gmodnop
gmodnop
gmodnop
gmodnop
gmodbra ntgetsongname ; GetSongName
gmodbra ntgetsongauthor ; GetSongAuthor
gmodbra getfreqmodspeed ; GetFrequency
gmodbra mt_music ; TimerTick
lea name(pc),a0 ; GetMakerName
move.l a0,d0
rts
**********************************************
*
* Soundtracker Module-Player
* for Soundtracker V2.6
*
* SEKA version
* (Devpac: replace 'blk' with 'dcb' (sic!) )
*
* last change: 03-Nov-90 mtn
*
**********************************************
* Note: mt_init has to be called up with the
* address of the module in A0 !!
**********************************************
* equates for voice-structure *
mt_cmdperiod equ 0 ;period
mt_cmd equ 2 ;instr/cmd
mt_cmdpar equ 3 ;cmd-parameter
mt_sampleadr equ 4 ;address of sample
mt_samplelen equ 8 ;length of sample
mt_samplerep equ $a ;address of repeat-part
mt_samplerepl equ $e ;length of repeat-part
mt_period equ $10 ;period to play
mt_volume equ $12 ;volume to set
mt_dmabit equ $14 ;dmabit for channel
mt_slidedir equ $16 ;slide up/down
mt_slidespeed equ $17 ;speed of slide
mt_slidedest equ $18 ;slide to period x
mt_vibamp equ $1a ;vibrato amplitude
mt_vibcount equ $1b ;counter for vibrato
mt_voicelen equ $1c
* equates for global player data-structure *
mt_data equ 0 ;address of module
mt_pattpos equ 4 ;current position
mt_dmacon equ 6 ;dma-bits
mt_speedEven equ 8 ;current speed (even frames)
mt_speedOdd equ 9 ; -"- (odd frames)
mt_songpos equ $a ;position-counter
mt_counter equ $b ;frame-counter
mt_break equ $c ;flag for pattern-break
mt_datalen equ $e
mt_init:
movem.l a2-a4,-(SP)
lea mt_playerdata(PC),a4
* clr.l mt_data(a4)
* cmp.l #'MTN'*256,$5b8(a0)
* bne mt_initerror
move.l a0,mt_data(a4)
move.l modend,a3
subq.l #4,a3
lea $3b8(a0),a1
moveq #0,d1
move.w #$1ff,d0
mt_loop:
cmp.b 0(a1,d0.w),d1
bhi.s mt_nothigh
move.b 0(a1,d0.w),d1
mt_nothigh:
dbf d0,mt_loop
addq.b #1,d1
lea mt_samplestarts(PC),a1
lsl.l #8,d1
lea 0(a0,d1.l),a2
add.w #$5bc,a2
moveq #$1e,d0
mt_lop3: cmp.l a2,a3 ; < Fix - prevent trashing memory
blt.s 1$
clr.l (a2)
1$ move.l a2,(a1)+
moveq #0,d1
move.w 42(a0),d1
add.l d1,d1
add.l d1,a2
add.w #$1e,a0
dbf d0,mt_lop3
or.b #2,$bfe001
move.b #$06,mt_speedEven(a4)
move.b #$06,mt_speedOdd(a4)
lea mt_voice1(PC),a0
move.w #$0001,mt_dmabit(a0)
lea mt_voice2(PC),a0
move.w #$0002,mt_dmabit(a0)
lea mt_voice3(PC),a0
move.w #$0004,mt_dmabit(a0)
lea mt_voice4(PC),a0
move.w #$0008,mt_dmabit(a0)
lea $dff0a8,a0
clr.w (a0)
clr.w $10(a0)
clr.w $20(a0)
clr.w $30(a0)
clr.b mt_songpos(a4)
clr.b mt_counter(a4)
clr.w mt_pattpos(a4)
*mt_initerror:
movem.l (SP)+,a2-a4
rts
mt_end:
move.l a0,-(SP)
lea $dff0a8,a0
clr.w (a0)
clr.w $10(a0)
clr.w $20(a0)
clr.w $30(a0)
move.w #$f,$96-$a8(a0)
move.l (SP)+,a0
rts
mt_music:
movem.l d2-d5/a2-a6,-(SP)
lea mt_playerdata(PC),a4
move.l mt_data(a4),d0
beq mt_playerror
move.l d0,a0
addq.b #1,mt_counter(a4)
move.b mt_counter(a4),d0
move.w mt_pattpos(a4),d1
lsr.w #2,d1
and.w #1,d1
move.b mt_speedEven(a4,d1.w),d1
cmp.b d1,d0
blt.s mt_nonew
clr.b mt_counter(a4)
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(a4),d0
divu #$3,d0
swap d0
tst.w d0
beq.s mt_arp2
cmp.w #2,d0
beq.s mt_arp1
moveq #0,d0
move.b mt_cmdpar(a6),d0
lsr.b #4,d0
bra.s mt_arp3
mt_arp1: moveq #0,d0
move.b mt_cmdpar(a6),d0
and.b #$f,d0
bra.s mt_arp3
mt_arp2: move.w mt_period(a6),d2
bra.s mt_arp4
mt_arp3: add.w d0,d0
moveq #0,d1
move.w mt_period(a6),d1
lea mt_periods(PC),a0
moveq #$24,d3
mt_arploop:
move.w 0(a0,d0.w),d2
cmp.w (a0),d1
bge.s mt_arp4
addq.l #2,a0
dbf d3,mt_arploop
rts
mt_arp4: move.w d2,6(a5)
rts
mt_getnew:
clr.w mt_dmacon(a4)
lea $dff0a0,a5
lea mt_voice1(pc),a6
moveq #0,d5
bsr.s mt_playvoice
lea $dff0b0,a5
lea mt_voice2(pc),a6
moveq #1,d5
bsr.s mt_playvoice
lea $dff0c0,a5
lea mt_voice3(pc),a6
moveq #2,d5
bsr.s mt_playvoice
lea $dff0d0,a5
lea mt_voice4(pc),a6
moveq #3,d5
bsr.s mt_playvoice
bra mt_setdma
mt_playvoice:
move.l mt_data(a4),a0
lea 12(a0),a3
lea $3b8(a0),a2
lea $5bc(a0),a0
moveq #0,d0
moveq #0,d1
move.b mt_songpos(a4),d0
lsl.w #2,d0
add.w d0,a2
move.b 0(a2,d5.w),d1
lsl.l #8,d1
add.w mt_pattpos(a4),d1
move.l 0(a0,d1.l),mt_cmdperiod(a6)
addq.l #4,d1
moveq #0,d2
move.b mt_cmd(a6),d2
and.b #$f0,d2
lsr.b #4,d2
move.b mt_cmdperiod(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
lsl.l #2,d2
mulu #$1e,d4
move.l 0(a1,d2.l),mt_sampleadr(a6)
move.w 0(a3,d4.l),mt_samplelen(a6)
move.w $2(a3,d4.l),mt_volume(a6)
move.w $4(a3,d4.l),d3
tst.w d3
beq.s mt_noloop
move.l mt_sampleadr(a6),d2
add.w d3,d3
add.l d3,d2
move.l d2,mt_samplerep(a6)
move.w $4(a3,d4.l),d0
add.w $6(a3,d4.l),d0
move.w d0,mt_samplelen(a6)
move.w $6(a3,d4.l),mt_samplerepl(a6)
move.w mt_volume(a6),8(a5)
bra.s mt_setregs
mt_noloop:
move.l mt_sampleadr(a6),d2
add.l d3,d2
move.l d2,mt_samplerep(a6)
move.w $6(a3,d4.l),mt_samplerepl(a6)
move.w mt_volume(a6),8(a5)
mt_setregs:
move.w mt_cmdperiod(a6),d0
and.w #$fff,d0
beq mt_checkcom2
move.b mt_cmd(a6),d0
and.b #$f,d0
cmp.b #$3,d0
bne.s mt_setperiod
bsr mt_setmyport
bra mt_checkcom2
mt_setperiod:
move.w mt_cmdperiod(a6),mt_period(a6)
and.w #$fff,mt_period(a6)
move.w mt_dmabit(a6),$dff096
clr.b mt_vibcount(a6)
move.l mt_sampleadr(a6),(a5)
move.w mt_samplelen(a6),4(a5)
move.w mt_period(a6),d0
and.w #$fff,d0
move.w d0,6(a5)
move.w mt_dmabit(a6),d0
or.w d0,mt_dmacon(a4)
bra mt_checkcom2
mt_setdma:
lea $dff000,a5
moveq #8,d3 ;less than this can cause trouble
bsr mt_waitscan
move.w mt_dmacon(a4),d0
or.w #$8000,d0
move.w d0,$96(a5)
moveq #1,d3
bsr mt_waitscan
lea mt_voice4(pc),a6
move.l mt_samplerep(a6),$d0(a5)
move.w mt_samplerepl(a6),$d4(a5)
lea mt_voice3(pc),a6
move.l mt_samplerep(a6),$c0(a5)
move.w mt_samplerepl(a6),$c4(a5)
lea mt_voice2(pc),a6
move.l mt_samplerep(a6),$b0(a5)
move.w mt_samplerepl(a6),$b4(a5)
lea mt_voice1(pc),a6
move.l mt_samplerep(a6),$a0(a5)
move.w mt_samplerepl(a6),$a4(a5)
addq.w #4,mt_pattpos(a4)
cmp.w #$100,mt_pattpos(a4)
bne.s mt_endr
mt_nex: clr.w mt_pattpos(a4)
clr.b mt_break(a4)
addq.b #1,mt_songpos(a4)
and.b #$7f,mt_songpos(a4)
move.b mt_songpos(a4),d1
move.l mt_data(a4),a0
cmp.b $3b6(a0),d1
bne.s mt_endr
clr.b mt_songpos(a4)
mt_endr: tst.b mt_break(a4)
bne.s mt_nex
mt_playerror:
movem.l (SP)+,d2-d5/a2-a6
rts
mt_waitscan:
move.b 6(a5),d1
mt_scanloop:
cmp.b 6(a5),d1
beq.s mt_scanloop
dbf d3,mt_waitscan
rts
mt_setmyport:
move.w mt_cmdperiod(a6),d2
and.w #$fff,d2
move.w d2,mt_slidedest(a6)
move.w mt_period(a6),d0
clr.b mt_slidedir(a6)
cmp.w d0,d2
beq.s mt_clrport
bge.s mt_rt
move.b #$1,mt_slidedir(a6)
rts
mt_clrport:
clr.w mt_slidedest(a6)
mt_rt: rts
mt_myport:
move.b mt_cmdpar(a6),d0
beq.s mt_myslide
move.b d0,mt_slidespeed(a6)
clr.b mt_cmdpar(a6)
mt_myslide:
tst.w mt_slidedest(a6)
beq.s mt_rt
moveq #0,d0
move.b mt_slidespeed(a6),d0
tst.b mt_slidedir(a6)
bne.s mt_mysub
add.w d0,mt_period(a6)
move.w mt_slidedest(a6),d0
cmp.w mt_period(a6),d0
bgt.s mt_myok
move.w mt_slidedest(a6),mt_period(a6)
clr.w mt_slidedest(a6)
mt_myok: move.w mt_period(a6),$6(a5)
rts
mt_mysub:
sub.w d0,mt_period(a6)
move.w mt_slidedest(a6),d0
cmp.w mt_period(a6),d0
blt.s mt_myok
move.w mt_slidedest(a6),mt_period(a6)
clr.w mt_slidedest(a6)
move.w mt_period(a6),$6(a5)
rts
mt_vib: move.b mt_cmdpar(a6),d0
beq.s mt_vi
move.b d0,mt_vibamp(a6)
mt_vi: move.b mt_vibcount(a6),d0
lea mt_sin(PC),a0
lsr.w #$2,d0
and.w #$1f,d0
moveq #0,d2
move.b 0(a0,d0.w),d2
move.b mt_vibamp(a6),d0
and.w #$f,d0
mulu d0,d2
lsr.w #$6,d2
move.w mt_period(a6),d0
tst.b mt_vibcount(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 mt_vibamp(a6),d0
lsr.w #$2,d0
and.w #$3c,d0
add.b d0,mt_vibcount(a6)
rts
mt_nop: move.w mt_period(a6),$6(a5)
rts
mt_checkcom:
move.w mt_cmd(a6),d0
and.w #$fff,d0
beq.s mt_nop
move.b mt_cmd(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 mt_period(a6),$6(a5)
cmp.b #$a,d0
beq.s mt_volslide
rts
mt_volslide:
moveq #0,d0
move.b mt_cmdpar(a6),d0
lsr.b #4,d0
tst.b d0
beq.s mt_voldown
add.w d0,mt_volume(a6)
cmp.w #$40,mt_volume(a6)
bmi.s mt_vol2
move.w #$40,mt_volume(a6)
mt_vol2: move.w mt_volume(a6),$8(a5)
rts
mt_voldown:
moveq #0,d0
move.b mt_cmdpar(a6),d0
and.b #$f,d0
sub.w d0,mt_volume(a6)
bpl.s mt_vol3
clr.w mt_volume(a6)
mt_vol3: move.w mt_volume(a6),$8(a5)
rts
mt_portup:
moveq #0,d0
move.b mt_cmdpar(a6),d0
sub.w d0,mt_period(a6)
move.w mt_period(a6),d0
and.w #$fff,d0
cmp.w #$71,d0
bpl.s mt_por2
and.w #$f000,mt_period(a6)
or.w #$71,mt_period(a6)
mt_por2: move.w mt_period(a6),d0
and.w #$fff,d0
move.w d0,$6(a5)
rts
mt_portdown:
clr.w d0
move.b mt_cmdpar(a6),d0
add.w d0,mt_period(a6)
move.w mt_period(a6),d0
and.w #$fff,d0
cmp.w #$358,d0
bmi.s mt_por3
and.w #$f000,mt_period(a6)
or.w #$358,mt_period(a6)
mt_por3: move.w mt_period(a6),d0
and.w #$fff,d0
move.w d0,$6(a5)
rts
mt_checkcom2:
move.b mt_cmd(a6),d0
and.b #$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 #$f,d0
beq.s mt_setspeed
rts
mt_setfilt:
move.b mt_cmdpar(a6),d0
and.b #1,d0
add.b d0,d0
and.b #$fd,$bfe001
or.b d0,$bfe001
rts
mt_pattbreak:
st mt_break(a4)
rts
mt_posjmp:
move.b mt_cmdpar(a6),d0
subq.b #1,d0
move.b d0,mt_songpos(a4)
st mt_break(a4)
rts
mt_setvol:
cmp.b #$40,mt_cmdpar(a6)
ble.s mt_vol4
move.b #$40,mt_cmdpar(a6)
mt_vol4: move.b mt_cmdpar(a6),$8(a5)
rts
mt_setspeed:
move.b mt_cmdpar(a6),d0
and.w #$ff,d0
beq.s mt_rts2
move.b d0,d1
and.b #$f0,d1
beq.s mt_speed1
lsr.b #4,d1
bra.s mt_speed3
mt_speed1:
move.b d0,d1
mt_speed3:
and.b #$f,d0
bne.s mt_speed2
move.b d1,d0
mt_speed2:
move.b d0,mt_speedEven(a4)
move.b d1,mt_speedOdd(a4)
clr.b mt_counter(a4)
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_playerdata: ds.b mt_datalen
mt_samplestarts: ds.l 31
mt_voice1: ds.b mt_voicelen
mt_voice2: ds.b mt_voicelen
mt_voice3: ds.b mt_voicelen
mt_voice4: ds.b mt_voicelen
name dc.b "SoundTracker 2.6",0
end