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/ Games of Daze / Infomagic - Games of Daze (Summer 1995) (Disc 1 of 2).iso / x2ftp / msdos / mxcode / gsrc211 / musgus.asm < prev next >

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Assembly Source File | 1994-03-14 | 69KB | 2,435 lines

segment GUSSound assume cs:GUSSound,ds:GUSSound StartSoundSeg = $ proc MUS push ax bx cx dx bp ds es push ax mov ax,cs mov ds,ax mov es,ax pop ax cld cmp bx,0fh ja @@HigherThanWeCount cmp bx,0 jz @@DoIt cmp [cs:MUSOK],1 jnz @@HigherThanWeCount @@DoIt: shl bx,1 call [Word bx+JumpTable] @@HigherThanWeCount: pop es ds bp dx cx bx ax retf endp MUS db 13,10,'Gravis UltraSound MOD Routines v2.1',0 db 13,10,'By Joshua C. Jensen',0 JumpTable dw offset MUS_Init ; Function 00 dw offset MUS_Close ; Function 01 dw offset MUS_SetVars ; Function 02 dw offset MUS_Nothing ; Function 03 dw offset MUS_PlayMusic ; Function 04 dw offset MUS_StopMusic ; Function 05 dw offset MUS_Nothing ; Function 06 dw offset MUS_SpeakerOn ; Function 07 dw offset MUS_SpeakerOff ; Function 08 dw offset MUS_ReturnInfo ; Function 09 dw offset MUS_SetInfo ; Function 0A dw offset MUS_RetVoice ; Function 0B dw offset MUS_RetMusicStatus ; Function 0C dw offset MUS_DumpSampleDRAM ; Function 0D ;include "ptable.inc" MUSOK db 0 PS16Header: Sig db 'PS16■' SongName db 75 dup (0) SongLen db 0 numpatterns db 0 commentofs dd 0 Sequences db 128 dup (0) Samples db 31*size PS16Sample dup (0) PS16Size = $-PS16Header PatternLoc dw 64 dup (0) InsLoc dd 32 dup (0) NumPatterns dw 0 Mus SMus <> NumLines db 0 MusBuf dw 0 ChannelMap db 32 dup (0) ChannelPriority db 32 dup (0) include "vect.rt" ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_Nothing - Dead... ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_Nothing near ret endp MUS_Nothing ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_Init - Initialize the music routines. ; AX - GF1 IRQ (0 for detect) ; CX - MIDI IRQ ; DX - Base port (0 for detect) ; SI - DMA IN ; DI - DMA OUT ; Carry set - No Gravis Ultrasound ; Returns: ; SI - IRQ ; DI - Port ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_Init near call u_DetectGUS jnb @@FoundGUS xor si,si xor di,di ret @@FoundGUS: mov bx,[cs:GUSIRQ] mov si,cs mov di,offset GUSInt call SetVect mov [Word cs:IntStore],di mov [Word cs:IntStore+2],si call u_Reset call MUS_SetMaxVolume mov [Word cs:Mus+(offset (SMus).HeaderLoc)],offset PS16Header mov [Word cs:Mus+(offset (SMus).HeaderLoc)+2],cs ; mov [Word cs:Mus+(offset (SMus).AnalyzerLoc)],offset AnalyzerHeights ; mov [Word cs:Mus+(offset (SMus).AnalyzerLoc)+2],cs mov [Word cs:Mus+(offset (SMus).PatternLoc)],offset PatternLoc mov [Word cs:Mus+(offset (SMus).PatternLoc)+2],cs mov [Word cs:Mus+(offset (SMus).InsLoc)],offset InsLoc mov [Word cs:Mus+(offset (SMus).InsLoc)+2],cs mov [Word cs:Mus+(offset (SMus).ChannelLoc)],offset Channel1 mov [Word cs:Mus+(offset (SMus).ChannelLoc)+2],cs mov [Word cs:Mus+(offset (SMus).mt_PeriodTable)],offset mt_PeriodTable mov [Word cs:Mus+(offset (SMus).mt_PeriodTable)+2],cs mov [Byte cs:MUSOK],1 mov si,[cs:GUSIRQ] mov di,[cs:u_Base] clc ret endp MUS_Init ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_Close - Kill all allocated segs, etc. ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_Close near call MUS_StopMusic call u_Reset mov bx,[cs:GUSIRQ] mov di,[Word cs:IntStore] mov si,[Word cs:IntStore+2] call RestoreVect mov [Byte cs:MUSOK],0 ret endp MUS_Close ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_SetVars - Sets various parameters for the card. ; AX - Sampling Rate (on SB, ignored here...) ; CL - Max Volume Setting ; CH - IRQ = 0 if default ; DX - GUS address ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_SetVars near mov [cs:MaxVolume],cl or ch,ch jz @@NoIRQChange mov [Byte cs:GUSIRQ],ch @@NoIRQChange: or dx,dx jz @@NoAddrChange mov [cs:u_Base],dx add dx,102h mov [cs:u_Voice],dx inc dx mov [cs:u_Command],dx inc dx mov [cs:u_DataLo],dx inc dx mov [cs:u_DataHi],dx mov dx,[cs:u_Base] add dx,6 mov [cs:u_Status],dx add dx,2 mov [cs:u_TimerControl],dx inc dx mov [cs:u_TimerData],dx @@NoAddrChange: ret endp MUS_SetVars ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_PlayMusic - Make proper calls and interrupt sets for module playing. ; In: cx:si - PM Structure ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_PlayMusic near push ds mov ds,cx mov ax,[si+(offset (PM).MusBuf)+2] mov [cs:MusBuf],ax mov ax,[si+PM.mt_speed] cmp ax,-1 jz @@SkipSpeed mov [Word cs:mt_speed],ax @@SkipSpeed: mov ax,[si+PM.mt_counter] cmp ax,-1 jz @@SkipCounter mov [Word cs:mt_counter],ax @@SkipCounter: mov ax,[si+PM.mt_SongPos] mov [word cs:mt_SongPos],ax mov ax,[si+PM.mt_PatternPos] mov [Word cs:mt_PatternPos],ax mov ax,cs mov es,ax mov di,offset PS16Header push ds si lds si,[si+PM.Header] mov cx,PS16Size rep movsb pop si ds mov di,offset PatternLoc push ds si lds si,[si+PM.PatternLoc] mov cx,64*2 rep movsb pop si ds mov di,offset InsLoc push ds si lds si,[si+PM.InsLoc] mov cx,32*4 rep movsb pop si ds mov [Byte cs:MStatus],0 call MUS_SetVoice call u_Reset mov bx,6 call u_TurnOnUserInt pop ds ret endp MUS_PlayMusic ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_StopMusic - Shuts down the interrupts for generating music. ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_StopMusic near mov [Byte cs:MStatus],1 call u_TurnOffUserInt call u_Reset ret endp MUS_StopMusic ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_SpeakerOn - Turns output speaker on. ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_SpeakerOn near mov dx,[cs:u_Base] mov al,00000000b out dx,al ret endp MUS_SpeakerOn ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_SpeakerOff - Turns output speaker off. ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_SpeakerOff near mov dx,[cs:u_Base] mov al,00000010b out dx,al ret endp MUS_SpeakerOff ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_ReturnInfo - Returns the SMUS structure location in SI:DI. ; In: ; CX - 1 = Copy info to SI:DI. ; 0 = Just return pointer. ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_ReturnInfo near mov ax,[cs:NumPatterns] mov [cs:offset Mus+(offset (SMus).NumPatterns)],ax mov al,[cs:mt_speed] mov [cs:offset Mus+(offset (SMus).mt_speed)],al mov al,[cs:mt_counter] mov [cs:offset Mus+(offset (SMus).mt_counter)],al mov ax,[cs:mt_PatternPos] mov [cs:offset Mus+(offset (SMus).mt_PatternPos)],ax mov al,[cs:mt_SongPos] mov [cs:offset Mus+(offset (SMus).mt_SongPos)],al mov al,[cs:PlayStatus] mov [cs:offset Mus+(offset (SMus).PlayStatus)],al mov ax,[cs:EditSeg] mov [cs:offset Mus+(offset (SMus).EditSeg)],ax mov ax,[cs:EditPat] mov [cs:offset Mus+(offset (SMus).EditPat)],ax mov ax,[cs:EditOfs] mov [cs:offset Mus+(offset (SMus).EditOfs)],ax mov al,[cs:MaxVolume] mov [cs:offset Mus+(offset (SMus).MaxVolume)],al mov al,[cs:SongLen] mov [cs:offset Mus+(offset (SMus).songlen)],al or cx,cx jnz @@CopyIt mov si,cs mov di,offset Mus ret @@CopyIt: push ds es mov es,si mov ax,cs mov ds,ax mov si,offset Mus mov cx,size Mus rep movsb pop es ds ret endp MUS_ReturnInfo ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_SetInfo - Sets the SMUS structure location to whatever is in SI:DI. ; In: ; CX - 1 = Set Max Volume ; 2 = Set Pattern Info ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_SetInfo near push cx ds es mov ds,si mov si,di mov ax,cs mov es,ax mov di,offset Mus mov cx,size Mus rep movsb pop es ds pop cx cli mov ax,[cs:offset Mus+(offset (SMus).NumPatterns)] mov [cs:NumPatterns],ax test cx,2 jz @@SkipSetPat mov al,[cs:offset Mus+(offset (SMus).mt_speed)] mov [cs:mt_speed],al mov al,[cs:offset Mus+(offset (SMus).mt_counter)] mov [cs:mt_counter],al mov ax,[cs:offset Mus+(offset (SMus).mt_PatternPos)] mov [cs:mt_PatternPos],ax mov [cs:EditOfs],ax mov al,[cs:offset Mus+(offset (SMus).mt_SongPos)] mov [cs:mt_SongPos],al mov [Byte PTr cs:EditPat],al mov al,[cs:offset Mus+(offset (SMus).PlayStatus)] mov [cs:PlayStatus],al @@SkipSetPat: mov al,[cs:offset Mus+(offset (SMus).MaxVolume)] mov [cs:MaxVolume],al mov al,[cs:offset Mus+(offset (SMus).songlen)] mov [cs:SongLen],al test cx,1 jz @@Leave call MUS_SetMaxVolume @@Leave: sti ret endp MUS_SetInfo ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_RetVoice ; In: AX - Voice ; ES:DX - Buffer from DRAM ; CX - Length ;▓────────────────────────────────────────────────────────────────────────────▓ ; Dump sample to DRAM ; ES:BX - Max 64k sample to dump to RAM. ; SI:DI - DRAM location to dump to. ; CX - Max bytes to dump. ; AH - Xor value. proc MUS_RetVoice near call u_ReadPos call u_Peek mov si,ax ret endp MUS_RetVoice ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_RetMusicStatus ; Out: SI - 1 Music Stopped ; DI - 1 Scope Triggered ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_RetMusicStatus near mov al,[cs:MStatus] xor ah,ah mov si,ax mov al,[cs:Trigger] xor ah,ah mov di,ax mov [Byte cs:Trigger],0 ret endp MUS_RetMusicStatus ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_DumpSampleDRAM ; CX - Sample Size ; SI:DI - Place in DRAM ; AX - Handle ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_DumpSampleDRAM near mov bx,ax call LoadDumpSample ret endp MUS_DumpSampleDRAM ; CX - Sample Size ; SI:DI - Place in DRAM ; BX - Handle ; DX - Sample Seg to read LDSeg dw 0 proc LoadDumpSample near push cx bx mov [cs:LDSeg],dx pop bx push ds mov ah,3Fh mov dx,0 mov ds,[cs:LDSeg] int 21h pop ds pop cx mov es,[cs:LDSeg] mov bx,0 mov ah,0 call u_DumpSampleToDRAM ret endp LoadDumpSample ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_SetMaxVolume - Set the Master volumes for the channels to the max value. ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_SetMaxVolume near mov al,[Byte cs:MaxVolume] mov [cs:offset Channel1+(offset (MS).MasterVolume)],al mov [cs:offset Channel2+(offset (MS).MasterVolume)],al mov [cs:offset Channel3+(offset (MS).MasterVolume)],al mov [cs:offset Channel4+(offset (MS).MasterVolume)],al ret endp MUS_SetMaxVolume ;▓────────────────────────────────────────────────────────────────────────────▓ ; MUS_SetVoice - ;▓────────────────────────────────────────────────────────────────────────────▓ proc MUS_SetVoice near mov cx,16 mov bx,offset Channel1 @@Looper: mov ax,0 mov [Word cs:bx+MS.start],ax mov ax,0f000h mov [Word cs:bx+(offset (MS).start)+2],ax add bx,size MS loop @@Looper ret endp MUS_SetVoice ; GUS card routines. MaxVoices = 31 IntStore dd 0 MIDIIRQ dw 0 GUSIRQ dw 0 DMAIn dw 0 DMAOut dw 0 u_Base dw 0 proc UDelay push dx ax mov dx,300h in al,dx in al,dx in al,dx in al,dx in al,dx in al,dx in al,dx pop ax dx ret endp UDelay ; BX:CX Set to whatever. proc u_Peek pushf cli push dx mov dx,[cs:u_Command] mov al,43h out dx,al inc dx ; 104h mov ax,cx out dx,ax dec dx ; 103h mov al,44h out dx,al add dx,2 mov al,bl out dx,al add dx,2 in al,dx pop dx popf ret endp u_Peek ; BX:CX Set to whatever. ; AX Value to poke proc u_Poke pushf cli push dx ax mov dx,[cs:u_Command] mov al,43h out dx,al inc dx mov ax,cx out dx,ax dec dx mov al,44h out dx,al add dx,2 mov al,bl out dx,al add dx,2 pop ax out dx,al in al,dx pop dx popf ret endp u_Poke ; DX - u_Base. proc u_Probe pushf cli mov dx,[cs:u_Command] mov al,4Ch out dx,al add dx,2 ; 105h mov al,0 out dx,al call UDelay call UDelay sub dx,2 ; 103h mov al,4Ch out dx,al add dx,2 ; 105h mov al,1 out dx,al call UDelay call UDelay mov ax,0AAh mov bx,0 mov cx,0 call u_Poke mov ax,055h mov bx,1 call u_Poke mov bx,0 call u_Peek push ax mov ax,0 call u_Poke sub dx,2 ; 103h mov al,4Ch out dx,al add dx,2 ; 105h mov al,0 out dx,al pop ax popf cmp al,0AAh jnz @@Nope clc ret @@Nope: stc ret endp u_Probe GUSChangeIRQ db 0,0,1,3,0,2,0,4,0,0,0,5,6,0,0,7 GUSChangeDMA db 1,0,2,0,3,4,5 ;1 5 proc u_SetInterface cmp [Word cs:GUSIRQ],0 jz @@Exit cli mov bx,[cs:MIDIIRQ] mov cl,[cs:bx+GUSChangeIRQ] shl cl,3 mov bx,[cs:GUSIRQ] or cl,[cs:bx+GUSChangeIRQ] cmp bx,[cs:MIDIIRQ] jnz @@JustStore or cl,40h @@JustStore: push cx mov bx,[cs:DMAOut] dec bx mov cl,[cs:bx+GUSChangeDMA] mov dx,cx shl dl,3 mov bx,[cs:DMAIn] dec bx mov cl,[cs:bx+GUSChangeDMA] inc bx cmp bx,[cs:DMAOut] jnz @@Fix or cl,40h jmp @@JustStore2 @@Fix: or cl,dl @@JustStore2: mov bl,cl pop cx mov dx,[cs:u_Base] mov al,8 out dx,al add dx,0Bh mov al,bl or al,80h out dx,al mov dx,[cs:u_Base] mov al,48h out dx,al add dx,0Bh mov al,cl out dx,al mov dx,[cs:u_Base] mov al,8 out dx,al add dx,0Bh mov al,bl out dx,al mov dx,[cs:u_Base] mov al,48h out dx,al add dx,0Bh mov al,cl out dx,al mov dx,[cs:u_Base] add dx,102h mov al,0 out dx,al mov dx,[cs:u_Base] mov al,9 out dx,al mov dx,[cs:u_Base] add dx,102h mov al,0 out dx,al sti @@Exit: ret endp u_SetInterface proc u_Reset call u_SetInterface cli mov bx,[cs:u_Command] mov cx,[cs:u_DataHi] mov dx,bx mov al,4Ch out dx,al mov dx,cx mov al,0 out dx,al call UDelay call UDelay mov dx,bx mov al,4Ch out dx,al mov dx,cx mov al,1 out dx,al call UDelay call UDelay mov dx,[cs:u_Voice] add dx,100h mov al,3 out dx,al call UDelay mov dx,[cs:u_Voice] add dx,100h mov al,0 out dx,al mov dx,bx mov al,41h out dx,al mov dx,cx mov al,0 out dx,al mov dx,bx mov al,45h out dx,al mov dx,cx mov al,0 out dx,al mov dx,bx mov al,49h out dx,al mov dx,cx mov al,0 out dx,al mov dx,bx mov al,0Eh out dx,al add dx,2 mov al,MaxVoices or al,0C0h out dx,al mov dx,[cs:u_Status] in al,dx mov dx,bx mov al,41h out dx,al mov dx,cx in al,dx mov dx,bx mov al,49h out dx,al mov dx,cx in al,dx mov dx,bx mov al,8Fh out dx,al mov dx,cx in al,dx push bx cx mov cx,0 @@VoiceClearLoop: mov dx,[cs:u_Voice] mov al,cl out dx,al inc dx mov al,9 out dx,al inc dl mov ax,0 out dx,ax dec dl mov al,0 out dx,al add dx,2 mov al,3 ; Turn voice off out dx,al sub dx,2 mov al,0Dh out dx,al add dx,2 mov al,3 out dx,al sub dx,2 inc cx cmp cx,32 jnz @@VoiceClearLoop pop cx bx mov dx,bx mov al,41h out dx,al mov dx,cx in al,dx mov dx,bx mov al,49h out dx,al mov dx,cx in al,dx mov dx,bx mov al,8Fh out dx,al mov dx,cx in al,dx mov dx,bx mov al,4Ch out dx,al mov dx,cx mov al,7 out dx,al sti ret endp u_Reset ; CX:AX - Number proc RShift mov bx,cx shr ax,7 shr cx,7 shl bx,9 or ax,bx ret endp RShift ; AX - Voice ; Returns: DX:AX - Position proc u_ReadPos pushf cli mov dx,[cs:u_Voice] out dx,al inc dx ; 103h mov al,8ah out dx,al inc dx ; 104h in ax,dx ; TEMP0 mov cx,ax dec dx ; 103h mov al,8bh out dx,al inc dx ; 104h in ax,dx ; TEMP1 xor dx,dx mov bx,cx shl cx,7 shl dx,7 shr bx,9 or dx,bx shr ax,9 and ax,7Fh or cx,ax mov ax,cx popf ret endp u_ReadPos ; Dump sample to DRAM ; ES:BX - Max 64k sample to dump to RAM. ; SI:DI - DRAM location to dump to. ; CX - Max bytes to dump. ; AH - Xor value. proc u_DumpSampleToDRAM cli push cx mov dx,[cs:u_Command] mov al,44h ; Dump upper byte, only do it on carry from now out dx,al ; on. add dx,2 push ax mov ax,si out dx,al pop ax sub dx,2 @@MainLoop: mov al,43h out dx,al inc dx push ax mov ax,di out dx,ax pop ax dec dx @@DumpByte: add dx,4 mov al,[es:bx] xor al,ah inc bx out dx,al sub dx,4 add di,1 jnc @@DoLoop inc si mov al,44h out dx,al add dx,2 push ax mov ax,si out dx,al pop ax sub dx,2 @@DoLoop: loop @@MainLoop pop cx sti ret endp u_DumpSampleToDRAM u_Voice dw 0 u_Command dw 0 u_DataLo dw 0 u_DataHi dw 0 u_Status dw 0 u_TimerControl dw 0 u_TimerData dw 0 u_adlibcontrol db 0 u_timermask db 0 u_IRQs db 2,3,5,7,11,12,15 u_IntStore dd 0,0,0,0,0,0,0 proc u_SetPorts mov dx,[cs:u_Base] add dx,102h mov [cs:u_Voice],dx inc dx mov [cs:u_Command],dx inc dx mov [cs:u_DataLo],dx inc dx mov [cs:u_DataHi],dx mov dx,[cs:u_Base] add dx,6 mov [cs:u_Status],dx add dx,2 mov [cs:u_TimerControl],dx inc dx mov [cs:u_TimerData],dx ret endp u_SetPorts ; In: ; DX - Base (0 for detect) ; CX - MIDI IRQ ; AX - IRQ (0 for detect) ; Carry set - No GUS ; No carry - GUS at u_Base proc u_DetectGUS mov [cs:GUSIRQ],ax mov [cs:MIDIIRQ],cx mov [cs:DMAIn],si mov [cs:DMAOut],di mov [cs:u_Base],dx call u_SetPorts clc ret endp u_DetectGUS ; bx - Speed (0-255) (* 80 microseconds) proc u_TurnOnUserInt cli or [Byte cs:u_adlibcontrol],4 or [Byte cs:u_timermask],1 mov dx,[cs:u_Command] mov al,46h out dx,al add dx,2 mov al,bl out dx,al sub dx,2 mov al,45h out dx,al add dx,2 mov al,[cs:u_adlibcontrol] out dx,al mov dx,[cs:u_TimerControl] mov al,4 out dx,al inc dx mov al,[cs:u_timermask] out dx,al sti ret endp u_TurnOnUserInt proc u_TurnOffUserInt cli and [Byte cs:u_adlibcontrol],0FBh and [Byte cs:u_timermask],0FEh mov dx,[cs:u_Command] mov al,45h out dx,al add dx,2 mov al,[cs:u_adlibcontrol] out dx,al call u_Reset sti ret endp u_TurnOffUserInt irqstatus db 0 proc GUSInt pusha push ds es mov dx,[cs:u_Status] in al,dx mov [cs:irqstatus],al @@TopOfInt: test [Byte cs:irqstatus],4 jz @@CheckNext mov dx,[cs:u_Command] mov al,45h out dx,al and [Byte cs:u_adlibcontrol],0FBh add dx,2 mov al,[cs:u_adlibcontrol] out dx,al or [Byte cs:u_adlibcontrol],4 mov al,[cs:u_adlibcontrol] out dx,al call sd_UpdateChannels cmp [Byte cs:MStatus],1 jnz @@CheckNext call u_TurnOffUserInt call u_Reset @@CheckNext: mov dx,[cs:u_Command] mov al,8Fh out dx,al add dx,2 in al,dx @@Finish: mov al,20h out 0A0h,al mov al,20h out 20h,al sti pop es ds popa iret endp GUSInt proc FindOpenChannel mov bx,0 @@Looper: cmp [cs:bx+ChannelMap],0 jz @@Open inc bx cmp bx,32 jnz @@Looper ; If we made it this far, check the priorities to turn one off. mov dx,0 mov cx,0FFh ; Max Priority mov bx,0 @@PLooper: cmp [cs:bx+ChannelPriority],cl jl @@Change jmp @@IncIt @@Change: mov cl,[cs:bx+ChannelPriority] mov dx,bx @@IncIt: inc bx cmp bx,32 jnz @@PLooper mov bx,ax @@Open: mov ax,bx ret endp FindOpenChannel ;┌──────────────────────────────────────────────────────────────────────────┐ ;│││──────────────────────── Protracker Stuff ────────────────────────────│││ ;└──────────────────────────────────────────────────────────────────────────┘ ;┌─┐ Protracker specific ;└─┘ variables. mt_speed db 6 mt_counter db 0 mt_PatternPos dw 0 mt_SongPos db 0 mt_PattDelayTime2 db 0 mt_PattDelayTime db 0 mt_PBreakFlag db 0 mt_PBreakPos db 0 mt_PosJumpFlag db 0 mt_LowMask db 0FFh Trigger db 0 mt_VibratoTable: db 0, 24, 49, 74, 97,120,141,161 db 180,197,212,224,235,244,250,253 db 255,253,250,244,235,224,212,197 db 180,161,141,120, 97, 74, 49, 24 Channel1 MS <0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4 , 0,0,0> Channel2 MS <0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11, 1,0,0> Channel3 MS <0,0,0,0,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11, 2,0,0> Channel4 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4 , 3,0,0> Channel5 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4 , 4,0,0> Channel6 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11, 5,0,0> Channel7 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11, 6,0,0> Channel8 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4 , 7,0,0> Channel9 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4 , 8,0,0> Channel10 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11, 9,0,0> Channel11 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,10,0,0> Channel12 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4 ,11,0,0> Channel13 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4 ,12,0,0> Channel14 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,13,0,0> Channel15 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,14,0,0> Channel16 MS <0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4 ,15,0,0> PlayStatus db 1 MStatus db 0 EditPat dw 0 EditSeg dw 0 EditOfs dw 0 ChangeIns db 0 MaxVolume db 200 EfxFlag db 0 mt_VolTable dw 00E00h,0B000h,0B800h,0BC00h,0BE00h,0C000h,0C400h,0C800h,0CC00h dw 0D000h,0D200h,0D400h,0D600h,0D800h,0DA00h,0DC00h,0DE00h dw 0E000h,0E100h,0E200h,0E300h,0E400h,0E500h,0E600h,0E700h dw 0E800h,0E900h,0EA00h,0EB00h,0EC00h,0ED00h,0EE00h,0EF00h dw 0F080h,0F100h,0F180h,0F200h,0F280h,0F300h,0F380h,0F400h dw 0F480h,0F500h,0F580h,0F600h,0F680h,0F700h,0F780h,0F800h dw 0F880h,0F900h,0F980h,0FA00h,0FA80h,0FB00h,0FB80h,0FC00h dw 0FC80h,0FD00h,0FD80h,0FE00h,0FE80h,0FF00h,0FF80h,0FFF0h include "period.asm" macro SetVoice mov [Byte cs:Voice],cl mov dx,[cs:u_Voice] mov al,[cs:si+MS.sc_Voice] out dx,al endm SetVoice Voice db 0 macro PlayVol local Done mov dx,[cs:u_Command] mov al,89h out dx,al inc dl in ax,dx cmp ax,[cs:si+MS.sc_Vol] jz Done mov ax,[cs:si+MS.sc_Vol] call slideramp Done: endm PlayVol macro PlayNote local Done mov dx,[cs:u_Command] mov al,81h out dx,al inc dl in ax,dx cmp ax,[cs:si+MS.sc_Note] jz Done dec dl mov al,1 out dx,al inc dl mov ax,[cs:si+MS.sc_Note] out dx,ax Done: endm PlayNote proc DecompressPattern near push di mov ax,es mov ds,ax mov ax,[cs:MusBuf] mov es,ax mov di,0 mov cx,3072/2 mov ax,0 rep stosw mov si,0 mov di,0 mov al,[si+2] mov [cs:NumLines],al add si,3 mov cx,0 @@ChannelLoop: push cx mov di,cx shl cx,1 add di,cx ; * 3 @@LineLoop: xor ah,ah lodsb cmp al,-1 jz @@NextChannel push di mov bx,ax shl ax,5 ; * 32 shl bx,4 ; * 16 add di,ax add di,bx movsb movsw pop di jmp @@LineLoop @@NextChannel: pop cx inc cx cmp cx,16 jnz @@ChannelLoop pop di ret endp DecompressPattern ;╒═══════════════════════════════════════════════════════════════════════════╕ ;│ NAME : sd_UpdateChannels │ ;│ *** Original code: Amiga Protracker by Lars Hamre. │ ;│ *** Converted by Joshua C. Jensen. │ ;╘═══════════════════════════════════════════════════════════════════════════╛ proc DecProc near cmp [cs:si+MS.DecVolume],0 ja @@AllRight mov [Byte cs:si+MS.DecVolume],1 @@AllRight: dec [Byte cs:si+MS.DecVolume] ret endp DecProc proc sd_UpdateChannels near mov ax,cs mov ds,ax mov es,ax mt_ContinueUpdate: inc [Byte cs:mt_counter] mov al,[cs:mt_counter] cmp al,[cs:mt_speed] jb mt_NoNewNote mov [Byte cs:mt_counter],0 cmp [Byte cs:mt_PattDelayTime2],0 jz mt_GetNewNote call mt_NoNewAllChannels jmp mt_dskip mt_NoNewNote: call mt_NoNewAllChannels jmp mt_NoNewPosYet mt_NoNewAllChannels: mov cx,16 mov si,offset Channel1 mt_NoNewLoop: push cx si call DecProc SetVoice call mt_CheckEfx PlayNote PlayVol pop si add si,size MS pop cx loop mt_NoNewLoop ret mt_GetNewNote: xor ax,ax mov al,[cs:mt_SongPos] mov di,ax mov [Word cs:EditPat],ax mov al,[cs:di+Sequences] shl al,1 mov di,offset PatternLoc add di,ax mov es,[cs:di] mov di,[cs:mt_PatternPos] call DecompressPattern mov [Word cs:EditSeg],es mov [Word cs:EditOfs],di mov cx,16 mov si,offset Channel1 mt_GetNewLoop: push cx si call DecProc SetVoice call mt_PlayVoice PlayNote PlayVol pop si add si,size MS pop cx loop mt_GetNewLoop jmp mt_dskip mt_PlayVoice: mov [Byte cs:EfxFlag],0 mov [Byte cs:ChangeIns],0 cmp [Byte cs:si],0 jnz mt_plvskip cmp [Word cs:si+1],0 jnz mt_plvskip call mt_PerNop mt_plvskip: mov al,[es:di] mov [cs:si+MS.note],al mov ax,[es:di+1] mov [Word cs:si+MS.cmd],ax add di,3 mov al,[cs:si+MS.cmd] and al,0F0h shr al,4 mov ah,[Byte cs:si+MS.note] and ah,11000000b shr ah,2 or al,ah ; Is there an ins? jz mt_SetRegisters mov [Byte cs:ChangeIns],1 mov [cs:si+MS.sc_Mode],0 dec al mov bl,al mov [cs:si+MS.SampleNum],al mov bh,size PS16Sample mul bh mov dx,ax xor bh,bh shl bx,2 add bx,offset InsLoc mov ax,[cs:bx] mov [Word cs:si+MS.start],ax mov ax,[cs:bx+2] mov [Word cs:si+(offset (MS).start)+2],ax mov bx,dx add bx,offset Samples mov cx,[cs:bx+PS16Sample.length] mov [Word cs:si+MS.length],cx mov [Word cs:si+(offset (MS).length)+2],0 mov ax,[Word cs:bx+PS16Sample.volume] mov [Word cs:si+MS.finetune],ax mov al,ah call volequ mov cx,[cs:bx+PS16Sample.replen]; Get the Repeat length. cmp cx,2 jbe mt_NoLoop or [Byte cs:si+MS.sc_Mode],00001000b mov cx,[cs:bx+PS16Sample.repeat] or cx,cx je mt_LoopNoFix dec cx mt_LoopNoFix: mov ax,[Word cs:si+MS.start] mov dx,[Word cs:si+(offset (MS).start)+2] add ax,cx adc dx,0 mov [Word cs:si+MS.loopstart],ax mov [Word cs:si+(offset (MS).loopstart)+2],dx mov [Word cs:si+MS.wavestart],ax mov [Word cs:si+(offset (MS).wavestart)+2],dx mov cx,[Word cs:bx+PS16Sample.replen] ; dec cx add ax,cx adc dx,0 mov [Word cs:si+MS.replen],ax mov [Word cs:si+(offset (MS).replen)+2],dx jmp mt_SetRegisters mt_NoLoop: mov ax,[Word cs:si+MS.start] mov dx,[Word cs:si+(offset (MS).start)+2] mov [Word cs:si+MS.loopstart],ax mov [Word cs:si+(offset (MS).loopstart)+2],dx mov [Word cs:si+MS.wavestart],ax mov [Word cs:si+(offset (MS).wavestart)+2],dx mov cx,[Word cs:bx+PS16Sample.length] dec cx add ax,cx adc dx,0 mov [Word cs:si+MS.replen],ax mov [Word cs:si+(offset (MS).replen)+2],dx mt_SetRegisters: mov al,[cs:si+MS.note] and al,00111111b jnz mt_ThereIsANote jmp mt_CheckMoreEfx mt_ThereIsANote: mov ax,[Word cs:si+MS.cmd] xchg ah,al and ax,0FF0h cmp ax,0E50h jz mt_DoSetFineTune cmp ah,3 ; Is it a tone portamento? jz mt_ChkTonePorta cmp ah,5 ; Is it a tone and volume slide? jz mt_ChkTonePorta cmp ah,9 ; Is it a sample offset command? jnz mt_SetPeriod call mt_CheckMoreEfx jmp mt_SetPeriod mt_DoSetFineTune: call mt_SetFineTune jmp mt_SetPeriod mt_ChkTonePorta: call mt_SetTonePorta jmp mt_CheckMoreEfx mt_SetPeriod: mov [Byte cs:ChangeIns],1 mov bl,[cs:si+MS.note] and bx,00111111b dec bx shl bx,1 mov al,[cs:si+MS.finetune] mov cl,61*2 mul cl add bx,ax mov ax,[Word cs:bx+mt_PeriodTable] mov [cs:si+MS.period],ax mov ax,[Word cs:si+MS.cmd] xchg ah,al and ax,0FF0h cmp ax,0ED0h jnz mt_NotANoteCut jmp mt_CheckMoreEfx mt_NotANoteCut: mov al,[cs:si+MS.wavecontrol] ; Get the wavecontrol. and al,00000100b ; Amiga: BTST #2,wavecontrol. jz mt_vibnoc ; If it is zero, then skip. mov [Byte cs:si+MS.vibratopos],0 mt_vibnoc: mov al,[cs:si+MS.wavecontrol] ; Get it again. and al,01000000b ; Amiga: BTST #6,wavecontrol jz mt_trenoc ; If it is zero, then skip. mov [Byte cs:si+MS.tremolopos],0 ; Zero the Tremolo offset. mt_trenoc: cmp [Byte cs:ChangeIns],1 jnz mt_SetGeneral mt_DoIns: ; high byte of sample start == F000H, turn off the voice cmp [Word cs:si+(offset (MS).start)+2],0f000h jz @@NoVoice push dx ax mov al,0 call doramp mov dx,[cs:u_Command] mov al,0 out dx,al mov al,3 add dl,2 out dx,al xor [cs:si+MS.sc_Voice],16 mov dx,[cs:u_Voice] mov al,[cs:si+MS.sc_Voice] out dx,al pop ax dx ; Send sample begin @@DoBegin: mov dx,[cs:u_Command] mov al,0ah out dx,al inc dx ; 104h mov ax,[Word cs:si+MS.start] mov cx,[Word cs:si+(offset (MS).start)+2] call RShift out dx,ax dec dx ; 103h mov al,0bh out dx,al inc dx ; 104h mov ax,[Word cs:si+MS.start] shl ax,9 out dx,ax mov dx,[cs:u_Command] mov al,2 out dx,al inc dx ; 104h mov ax,[Word cs:si+MS.loopstart] mov cx,[Word cs:si+(offset (MS).loopstart)+2] call RShift out dx,ax dec dx ; 103h mov al,3 out dx,al inc dx ; 104h mov ax,[Word cs:si+MS.loopstart] shl ax,9 out dx,ax mov dx,[cs:u_Command] mov al,4 out dx,al inc dx ; 104h mov ax,[Word cs:si+MS.replen] mov cx,[Word cs:si+(offset (MS).replen)+2] call RShift out dx,ax dec dx ; 103h mov al,5 out dx,al inc dx ; 104h mov ax,[Word cs:si+MS.replen] shl ax,9 out dx,ax dec dx ; 103h mov al,0 out dx,al add dx,2 mov al,[Byte cs:si+MS.sc_Mode] out dx,al mt_SetGeneral: call mt_PerNop mov dx,[cs:u_Command] mov al,0ch out dx,al add dx,2 mov al,[cs:si+MS.sc_PanPosition] out dx,al sub dx,2 jmp @@Bottom ; Shuts off the voice @@NoVoice: mov al,0 call doramp mov al,0 out dx,al add dl,2 mov al,3 out dx,al @@Bottom: @@Done: mov ax,[cs:si+MS.period] ; call SpectrumAnalyzer ; ST n_trigger(A6) mov [Byte cs:Trigger],1 cmp [Byte cs:EfxFlag],1 jz @@Skip call mt_CheckMoreEfx @@Skip: ret endp sd_UpdateChannels proc mt_dskip near mov [Word cs:EditSeg],es mov ax,[Word cs:mt_PatternPos] mov [Word cs:EditOfs],ax add [Word cs:mt_PatternPos],48 mov al,[cs:mt_PattDelayTime] or al,al jz mt_dskc mov [cs:mt_PattDelayTime2],al mov [Byte cs:mt_PattDelayTime],0 mt_dskc: cmp [Byte cs:mt_PattDelayTime2],0 jz mt_dska dec [Byte cs:mt_PattDelayTime2] jz mt_dska sub [Word cs:mt_PatternPos],48 mt_dska: cmp [Byte cs:mt_PBreakFlag],0 jz mt_nnpysk mov [Byte cs:mt_PBreakFlag],0 xor ax,ax mov al,[cs:mt_PBreakPos] mov [cs:mt_PBreakPos],ah mov bx,48 mul bx mov [cs:mt_PatternPos],ax mt_nnpysk: cmp [Word cs:mt_PatternPos],1024*3 jb mt_NoNewPosYet mt_NextPosition: xor ax,ax mov al,[cs:mt_PBreakPos] mov bx,48 mul bx mov [cs:mt_PatternPos],ax mov [Byte cs:mt_PBreakPos],0 mov [Byte cs:mt_PosJumpFlag],0 inc [Byte cs:mt_SongPos] and [Byte cs:mt_SongPos],7Fh mov al,[cs:mt_SongPos] cmp al,[cs:SongLen] jnz mt_NoNewPosYet mov [Byte cs:mt_SongPos],0 cmp [Byte cs:PlayStatus],1 jnz @@Quit mov [Byte cs:mt_SongPos],0 ret ;--------------------------------------------------- @@Quit: mov [Byte cs:MStatus],1 mov [Byte cs:mt_SongPos],0 ret mt_NoNewPosYet: cmp [Byte cs:mt_PosJumpFlag],0 jnz mt_NextPosition ret endp mt_dskip proc mt_CheckEfx near mov ax,[Word cs:si+MS.cmd] xchg al,ah and ax,0FFFh jz mt_Return mov bl,[cs:si+MS.cmd] and bl,0Fh cmp bl,0 jz mt_Arpeggio cmp bl,1 jz mt_PortaUp cmp bl,2 jz mt_PortaDown cmp bl,3 jz mt_TonePortamento cmp bl,4 jz mt_Vibrato cmp bl,5 jz mt_TonePlusVolSlide cmp bl,6 jz mt_VibratoPlusVolSlide cmp bl,0Eh jz mt_E_Commands SetBack:call mt_PerNop cmp bl,7 jz mt_Tremolo cmp bl,0Ah jz mt_VolumeSlide mt_Return: ret endp mt_CheckEfx ; Effect 0 -- Arpeggio proc mt_Arpeggio near xor ax,ax mov al,[cs:mt_counter] mov bl,3 div bl xchg al,ah cmp al,1 jz mt_Arpeggio1 cmp al,2 jz mt_Arpeggio2 mt_Arpeggio0: mov cx,[cs:si+MS.period] jmp ArpeggioSet mt_Arpeggio1: xor ax,ax mov al,[Byte cs:si+MS.cmdlo] shr al,4 jmp ArpeggioFind mt_Arpeggio2: xor ax,ax mov al,[cs:si+MS.cmdlo] and al,15 ArpeggioFind: shl ax,1 mov bx,ax mov al,[cs:si+MS.finetune] mov cl,61*2 mul cl mov dx,[cs:si+MS.period] push di mov di,offset mt_PeriodTable add di,ax mov cx,60 mt_arploop: mov ax,[cs:bx+di] cmp dx,[cs:di] jnb mt_arpafterloop add di,2 loop mt_arploop pop di ret mt_arpafterloop: pop di mov cx,ax ArpeggioSet: call mt_PerNop2 ret endp mt_Arpeggio ; Effect 1 -- Portamento Up proc mt_PortaUp near xor ax,ax mov al,[cs:si+MS.cmdlo] and al,[cs:mt_LowMask] mov [Byte cs:mt_LowMask],0FFh sub [cs:si+MS.period],ax mov cx,[cs:si+MS.period] and cx,0FFFh cmp cx,71h jnb mt_PortaUSkip and [cs:si+MS.period],0F000h or [cs:si+MS.period],71h mt_PortaUSkip: mov cx,[cs:si+MS.period] and cx,0FFFh call mt_PerNop ret endp mt_PortaUp ; Effect 2 -- Portamento Down proc mt_PortaDown near xor ax,ax mov al,[cs:si+MS.cmdlo] and al,[cs:mt_LowMask] mov [Byte cs:mt_LowMask],0FFh add [cs:si+MS.period],ax mov cx,[cs:si+MS.period] and cx,0FFFh cmp cx,358h jb mt_PortaDSkip and [cs:si+MS.period],0F000h or [cs:si+MS.period],856 mt_PortaDSkip: mov cx,[cs:si+MS.period] and cx,0FFFh call mt_PerNop ret endp mt_PortaDown proc mt_SetTonePorta near push di mov di,offset mt_PeriodTable mov bl,[cs:si+MS.note] and bx,00111111b dec bx shl bx,1 mov dx,[Word cs:bx+di] xor ax,ax mov al,[cs:si+MS.finetune] mov cl,61*2 mul cl add di,ax mov bx,0 mt_StpLoop: cmp dx,[cs:bx+di] jnb mt_StpFound add bx,2 cmp bx,61*2 jb mt_StpLoop mov bx,59*2 mt_StpFound: mov dl,[cs:si+MS.finetune] and dl,8 jz mt_StpGoss or bx,bx jz mt_StpGoss sub bx,2 mt_StpGoss: mov dx,[cs:bx+di] pop di mov [cs:si+MS.wantedperiod],dx mov ax,[cs:si+MS.period] mov [Byte cs:si+MS.toneportdirec],0 cmp dx,ax jz mt_ClearTonePorta jnb mt_Return mov [Byte cs:si+MS.toneportdirec],1 ret mt_ClearTonePorta: mov [Word cs:si+MS.wantedperiod],0 ret endp mt_SetTonePorta ; Effect 3 -- Tone Portamento proc mt_TonePortamento near mov al,[cs:si+MS.cmdlo] or al,al jz mt_TonePortNoChange mov [cs:si+MS.toneportspeed],al mov [Byte cs:si+MS.cmdlo],0 mt_TonePortNoChange: cmp [Word cs:si+MS.wantedperiod],0 jz mt_Return xor ax,ax mov al,[cs:si+MS.toneportspeed] cmp [Byte cs:si+MS.toneportdirec],0 jnz mt_TonePortaUp mt_TonePortaDown: add [cs:si+MS.period],ax mov ax,[cs:si+MS.wantedperiod] cmp ax,[cs:si+MS.period] jg mt_TonePortaSetPer mov [cs:si+MS.period],ax mov [Word cs:si+MS.wantedperiod],0 jmp mt_TonePortaSetPer mt_TonePortaUp: sub [cs:si+MS.period],ax mov ax,[cs:si+MS.wantedperiod] cmp ax,[cs:si+MS.period] jl mt_TonePortaSetPer mov [cs:si+MS.period],ax mov [Word cs:si+MS.wantedperiod],0 mt_TonePortaSetPer: mov cx,[cs:si+MS.period] mov al,[cs:si+MS.glissfunk] and al,0Fh jz mt_GlissSkip mov al,[cs:si+MS.finetune] mov bl,61*2 mul bl push di mov di,offset mt_PeriodTable add di,ax mov bx,0 mt_GlissLoop: cmp cx,[cs:bx+di] jnb mt_GlissFound add bx,2 cmp bx,61*2 jb mt_GlissLoop mov bx,59*2 mt_GlissFound: mov cx,[cs:bx+di] pop di mt_GlissSkip: call mt_PerNop2 ret endp mt_TonePortamento ; Effect 4 -- Vibrato proc mt_Vibrato near mov al,[cs:si+MS.cmdlo] or al,al jz mt_Vibrato2 mov cl,[cs:si+MS.vibratocmd] and al,0fh jz mt_vibskip and cl,0F0h or cl,al mt_vibskip: mov al,[cs:si+MS.cmdlo] and al,0F0h jz mt_vibskip2 and cl,0Fh or cl,al mt_vibskip2: mov [cs:si+MS.vibratocmd],cl mt_Vibrato2: mov al,[cs:si+MS.vibratopos] mov bx,offset mt_VibratoTable shr ax,2 and ax,001Fh xor cx,cx mov cl,[cs:si+MS.wavecontrol] and cl,03h jz mt_vib_sine shl al,3 cmp cl,1 jz mt_vib_rampdown mov cl,255 jmp mt_vib_set mt_vib_rampdown: cmp [Byte cs:si+MS.vibratopos],0 jnl mt_vib_rampdown2 mov cl,255 sub cl,al jmp mt_vib_set mt_vib_rampdown2: mov cl,al jmp mt_vib_set mt_vib_sine: add bl,al mov cl,[cs:bx] mt_vib_set: mov al,[cs:si+MS.vibratocmd] and al,15 mul cl shr ax,7 mov cx,ax mov ax,[cs:si+MS.period] cmp [Byte cs:si+MS.vibratopos],0 jl mt_VibratoNeg ; BMI add ax,cx jmp mt_Vibrato3 mt_VibratoNeg: sub ax,cx mt_Vibrato3: mov cx,ax call mt_PerNop2 mov al,[cs:si+MS.vibratocmd] shr ax,2 and ax,3Ch add [cs:si+MS.vibratopos],al ret endp mt_Vibrato ; Effect 5 -- Tone and Volume Slide proc mt_TonePlusVolSlide near call mt_TonePortNoChange jmp mt_VolumeSlide endp mt_TonePlusVolSlide ; Effect 6 -- Vibrato and Volume Slide proc mt_VibratoPlusVolSlide near call mt_Vibrato2 jmp mt_VolumeSlide endp mt_VibratoPlusVolSlide ; Effect 7 -- Tremolo proc mt_Tremolo near mov al,[Byte cs:si+MS.cmdlo] or al,al jz mt_Tremolo2 mov cl,[cs:si+MS.tremolocmd] and al,0Fh jz mt_treskip and cl,0F0h or cl,al mt_treskip: mov al,[Byte cs:si+MS.cmdlo] and al,0F0h jz mt_treskip2 and cl,0Fh or cl,al mt_treskip2: mov [cs:si+MS.tremolocmd],cl mt_Tremolo2: mov al,[cs:si+MS.tremolopos] shr al,2 and ax,001Fh xor cx,cx mov cl,[cs:si+MS.wavecontrol] shr cl,4 and cl,03h jz mt_tre_sine shl al,3 cmp cl,1 jz mt_tre_rampdown mov cl,255 jmp mt_tre_set mt_tre_rampdown: cmp [Byte cs:si+MS.vibratopos],0 jnb mt_tre_rampdown2 mov cl,255 sub cl,al jmp mt_tre_set mt_tre_rampdown2: mov cl,al jmp mt_tre_set mt_tre_sine: xor bx,bx mov bl,al mov cl,[cs:bx+offset mt_VibratoTable] mt_tre_set: mov al,[cs:si+MS.tremolocmd] and al,0Fh mul cl mov cx,ax shr cx,6 mov al,[cs:si+MS.volume] cmp [Byte cs:si+MS.tremolopos],0 jb mt_TremoloNeg ; BMI jns add al,cl jmp mt_Tremolo3 mt_TremoloNeg: sub al,cl mt_Tremolo3: jnb mt_TremoloSkip xor ax,ax mt_TremoloSkip: cmp al,40h jb mt_TremoloOK ; BLS mov al,40h mt_TremoloOK: call volequ mov al,[cs:si+MS.tremolocmd] shr al,2 and al,3Ch add [cs:si+MS.tremolopos],al ret endp mt_Tremolo ; Effect 9 -- Sample Offset proc mt_SampleOffset near mov al,[Byte cs:si+MS.cmdlo] or al,al jz mt_sononew mov [cs:si+MS.sampleoffset],al mt_sononew: mov al,[cs:si+MS.sampleoffset] ; Variance in Protracker code. shl ax,8 ; cmp ax,[cs:si+MS.reallength] ; jge mt_sofskip mov cx,ax or cx,cx jnz mt_dontset dec cx mt_dontset: mov ax,[Word cs:si+MS.start] mov dx,[Word cs:si+(offset (MS).start)+2] add ax,cx adc dx,0 mov [Word cs:si+MS.start],ax mov [Word cs:si+(offset (MS).start)+2],dx ret mt_sofskip: ret endp mt_SampleOffset ; Effect A -- Volume Slide proc mt_VolumeSlide near mov al,[cs:si+MS.cmdlo] shr al,4 or al,al jz mt_VolSlideDown mt_VolSlideUp: add [Byte cs:si+MS.volume],al cmp [Byte cs:si+MS.volume],40h jb mt_vsuskip mov [Byte cs:si+MS.volume],40h mt_vsuskip: mov al,[Byte cs:si+MS.volume] call volequ ret mt_VolSlideDown: mov al,[cs:si+MS.cmdlo] and al,0Fh mt_VolSlideDown2: sub [Byte cs:si+MS.volume],al jnb mt_vsdskip mov [Byte cs:si+MS.volume],0 mt_vsdskip: mov al,[Byte cs:si+MS.volume] call volequ ret endp mt_VolumeSlide ; Effect B -- Position Jump proc mt_PositionJump near mov al,[Byte cs:si+MS.cmdlo] ; Get where to jump dec al ; Update the mov [cs:mt_SongPos],al ; information. mt_pj2: mov [Byte cs:mt_PBreakPos],0 mov [Byte cs:mt_PosJumpFlag],1 ret endp mt_PositionJump ; Effect C -- Volume Change proc mt_VolumeChange near mov al,[Byte cs:si+MS.cmdlo] ; Get value for volume cmp al,40h ; Is it greater than 40h? jb mt_VolumeOK ; Nope mov al,40h mt_VolumeOK: mov [cs:si+MS.volume],al ; Get it again call volequ ret endp mt_VolumeChange ; Effect D -- Pattern Break proc mt_PatternBreak near mov al,[Byte cs:si+MS.cmdlo] ; Break to where? mov cl,al shr al,4 mov bl,10 mul bl and cl,0Fh add al,cl cmp al,63 jg mt_pj2 mov [cs:mt_PBreakPos],al mov [Byte cs:mt_PosJumpFlag],1 ret endp mt_PatternBreak ; Effect F -- Set Speed ; Doesn't handle Protracker extended speeds. proc mt_SetSpeed near mov al,[Byte cs:si+MS.cmdlo] ; Get value for speed or al,al jz mt_SpeedLeave cmp al,32 jnb mt_SpeedExt mt_SpeedSet: mov [Byte cs:mt_counter],0 mov [Byte cs:mt_speed],al mt_SpeedLeave: ret mt_SpeedExt: ret endp mt_SetSpeed proc mt_CheckMoreEfx near mov bl,[cs:si+MS.cmd] and bl,0Fh cmp bl,09h jz mt_SampleOffset cmp bl,0Bh jz mt_PositionJump cmp bl,0Dh jz mt_PatternBreak cmp bl,0Eh jz mt_E_Commands cmp bl,0Fh jz mt_SetSpeed cmp bl,0Ch jz mt_VolumeChange jmp mt_PerNop endp mt_CheckMoreEfx proc mt_E_Commands near mov bl,[Byte cs:si+MS.cmdlo] and bl,0F0h shr bl,4 cmp bl,0 jz mt_FilterOnOff cmp bl,1 jz mt_FinePortaUp cmp bl,2 jz mt_FinePortaDown cmp bl,3 jz mt_SetGlissControl cmp bl,4 jz mt_SetVibratoControl cmp bl,5 jz mt_SetFineTune cmp bl,6 jz mt_JumpLoop cmp bl,7 jz mt_SetTremoloControl cmp bl,0Eh jz mt_PatternDelay cmp bl,9 jz mt_RetrigNote cmp bl,0Ah jz mt_VolumeFineUp cmp bl,0Bh jz mt_VolumeFineDown cmp bl,0Ch jz mt_NoteCut cmp bl,0Dh jz mt_NoteDelay ret endp mt_E_Commands ;────────────────────────────────────────────────────────────────────────── ; Effect E ;────────────────────────────────────────────────────────────────────────── ; Effect 0 -- FilterOnOff proc mt_FilterOnOff near mov al,[Byte cs:si+MS.cmdlo] and al,1 sal al,1 ; Amiga ; Stuff ret endp mt_FilterOnOff ; Effect 1 -- Fine Porta Up proc mt_FinePortaUp near cmp [Byte cs:mt_counter],0 jnz mt_Return mov [Byte cs:mt_LowMask],0Fh jmp mt_PortaUp endp mt_FinePortaUp ; Effect 2 -- Fine Porta Down proc mt_FinePortaDown near cmp [Byte cs:mt_counter],0 jnz mt_Return mov [Byte cs:mt_LowMask],0Fh jmp mt_PortaDown endp mt_FinePortaDown ; Effect 3 -- Set Gliss Control proc mt_SetGlissControl near mov al,[Byte cs:si+MS.cmdlo] and al,0Fh and [Byte cs:si+MS.glissfunk],0F0h or [cs:si+MS.glissfunk],al ret endp mt_SetGlissControl ; Effect 4 -- Set Vibrato Control proc mt_SetVibratoControl near mov al,[cs:si+MS.cmdlo] and al,0Fh and [Byte cs:si+MS.wavecontrol],0F0h or [cs:si+MS.wavecontrol],al ret endp mt_SetVibratoControl ; Effect 5 -- Set Fine Tune proc mt_SetFineTune near mov al,[cs:si+MS.cmdlo] and al,0Fh mov [cs:si+MS.finetune],al ret endp mt_SetFineTune ; Effect 6 -- Jump Loop proc mt_JumpLoop near cmp [Byte cs:mt_counter],0 jnz mt_Return mov al,[cs:si+MS.cmdlo] and al,0Fh jz mt_SetLoop cmp [Byte cs:si+MS.loopcount],0 jz mt_jumpcnt dec [Byte cs:si+MS.loopcount] jz mt_Return mt_jmploop: mov al,[cs:si+MS.pattpos] mov [cs:mt_PBreakPos],al mov [Byte cs:mt_PBreakFlag],1 ret mt_jumpcnt: mov [cs:si+MS.loopcount],al jmp mt_jmploop mt_SetLoop: ; xor dx,dx mov ax,[cs:mt_PatternPos] mov bx,48 ; call DivIt div bl and ax,63 mov [cs:si+MS.pattpos],al ret endp mt_JumpLoop ; Effect 7 -- Set Tremolo Control proc mt_SetTremoloControl near mov al,[Byte cs:si+MS.cmdlo] and al,0Fh shl al,4 and [Byte cs:si+MS.wavecontrol],0Fh or [cs:si+MS.wavecontrol],al ret endp mt_SetTremoloControl ; Effect 9 -- Retrig Note proc mt_RetrigNote near mov bl,[Byte cs:si+MS.cmdlo] and bl,0Fh jz mt_rtnend xor ax,ax mov al,[cs:mt_counter] or al,al jnz mt_rtnskp mov al,[cs:si+MS.note] or al,al jnz mt_rtnend ; mov [Byte cs:mt_counter],0 xor ax,ax mov al,[cs:mt_counter] mt_rtnskp: div bl xchg ah,al or al,al jnz mt_rtnend mt_DoRetrig: mov [Byte cs:EfxFlag],1 call mt_DoIns mov [Byte cs:EfxFlag],0 mt_rtnend: ret endp mt_RetrigNote ; Effect A -- Volume Fine Up proc mt_VolumeFineUp near cmp [Byte cs:mt_counter],0 jnz mt_Return mov al,[cs:si+MS.cmdlo] and al,0Fh jmp mt_VolSlideUp endp mt_VolumeFineUp ; Effect B -- Volume Fine Down proc mt_VolumeFineDown near cmp [Byte cs:mt_counter],0 jnz mt_Return mov al,[cs:si+MS.cmdlo] and al,0Fh jmp mt_VolSlideDown2 endp mt_VolumeFineDown ; Effect C -- Note Cut proc mt_NoteCut near mov al,[Byte cs:si+MS.cmdlo] and al,0Fh cmp al,[cs:mt_counter] jnz mt_Return mov [Byte cs:si+MS.volume],0 mov al,[Byte cs:si+MS.volume] call volequ ret endp mt_NoteCut ; Effect D -- Note Delay proc mt_NoteDelay near mov al,[Byte cs:si+MS.cmdlo] and al,0Fh cmp al,[cs:mt_counter] jnz mt_Return mov al,[cs:si] and al,00111111b jz mt_Return jmp mt_DoRetrig endp mt_NoteDelay ; Effect E -- Pattern Delay proc mt_PatternDelay near cmp [Byte cs:mt_counter],0 jnz mt_Return mov al,[Byte cs:si+MS.cmdlo] and al,0Fh cmp [Byte cs:mt_PattDelayTime2],0 jnz mt_Return inc al mov [cs:mt_PattDelayTime],al ret endp mt_PatternDelay proc doramp near push bx si mov ah,0 cmp [Byte cs:si+MS.MasterVolume],0 jz @@ZeroVol mul [Byte cs:si+MS.MasterVolume] inc ah @@ZeroVol: mov bl,ah xor bh,bh shl bx,1 mov ax,[cs:bx+mt_VolTable] jmp slideramp2 slideramp: push bx si slideramp2: mov si,ax mov dx,[cs:u_Command] mov al,0Dh out dx,al add dl,2 mov al,3 out dx,al sub dl,2 mov al,89h out dx,al inc dx in ax,dx push si push ax shr ax,8 shr si,8 cmp ax,si jz @@Done2 jb @@OK xchg si,ax @@OK: push ax mov dx,[cs:u_Command] mov al,7 out dx,al add dx,2 pop ax out dx,al mov dx,[cs:u_Command] mov al,8 out dx,al add dx,2 mov ax,si out dx,al mov dx,[cs:u_Command] mov al,6 out dx,al add dx,2 mov al,00111111b out dx,al mov bl,00000000b pop ax pop si cmp ax,si jb @@OK2 or bl,01000000b @@OK2: mov dx,[cs:u_Command] mov al,0Dh out dx,al add dx,2 mov al,bl out dx,al jmp @@Done @@Done2: pop ax ax @@Done: pop si bx ret endp doramp proc volequ near push bx si mov [cs:si+MS.DecVolume],al mov ah,0 cmp [Byte cs:si+MS.MasterVolume],0 jz @@ZeroVol mul [Byte cs:si+MS.MasterVolume] inc ah @@ZeroVol: mov bl,ah xor bh,bh shl bx,1 mov ax,[cs:bx+mt_VolTable] @@Skip: mov [cs:si+MS.sc_Vol],ax pop si bx ret endp volequ proc DivIt near or bx,bx stc jz Div1 mov cx,ax mov ax,dx xor dx,dx div bx xchg cx,ax div bx xchg dx,cx clc Div1: ret endp DivIt proc mt_PerNop near mov cx,[cs:si+MS.period] ; get period Value proc mt_PerNop2 near mov ax,cx and ax,0FFFh or ax,ax jz @@OutIt push dx bx ax mov bx,19 mov dx,36h mov ax,9E9Ah call DivIt pop bx call DivIt pop bx dx @@OutIt: mov [cs:si+MS.sc_Note],ax ret endp mt_PerNop2 endp mt_PerNop SizeSoundSeg = $-StartSoundSeg ends GUSSound