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IT_D_RM.INC
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IT_D_RM.INC
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;ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ
;
; Read module functions
;
;ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ
IF TUTORIAL
ELSE
Proc D_PreLoadModule ; Returns ES = song segment
; BX = file handle
; DS = Diskdata area
; AX = SaveFormat
; Call MouseUpdateEnable
IF DEFAULTFORMAT
Test AL, AL
JNZ D_PreLoadModuleTemp
Mov AL, DEFAULTFORMAT
D_PreLoadModuleTemp:
ENDIF
Mov SaveFormat, AL
Call I_ClearTables
Call Music_ReleaseAllPatterns
Call Music_ReleaseAllSamples
Call Music_ClearAllSampleNames
Call Music_ClearAllInstruments
Call Msg_ResetMessage
Call ReleaseTimerData
Mov DS, CS:DiskDataArea
Mov BX, CS:CurrentFile
Add BX, BX
Mov BX, [BX]
Add BX, 8
Push CS
Pop ES
Mov DI, Offset FileName ; OK...
Mov SI, BX ; Data area no longer
Mov CX, 13 ; reqd
Rep MovsB
Mov AX, 3D00h
Mov DX, BX
Int 21h
JC D_LoadFileOpenErrorMsg
Mov BX, AX ; BX = file handle.
Call Music_GetSongSegment
Mov ES, AX
Ret
EndP D_PreLoadModule
;ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ
Proc D_PostLoadModule Far
Mov AH, 3Eh ; Close file.
Int 21h
Push CS
Pop DS
Assume DS:Disk
Call CheckTimerData
Call GetCurrentTime
Mov [TopTimerData], 0
Call GetTimerCounter
Mov [EditTimer], EAX
Call PE_ResetOrderPattern
; Mov AX, 1
Ret
EndP D_PostLoadModule
Assume DS:Nothing
;ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ
Proc D_InsertOrder ; DX = inserting pattern, BP = current
; ES = songdata
PushA
Push DS
Push ES
Pop DS
Mov SI, 1FFh
Mov AX, BP
D_InsertOrder1:
Cmp AL, [SI]
JE D_InsertOrder2
D_InsertOrderResume:
Dec SI
Cmp SI, 100h
JAE D_InsertOrder1
Pop DS
PopA
Ret
D_InsertOrder2:
Push SI
Mov CX, 1FEh
Mov DI, 1FFh
Sub CX, SI
JC D_InsertOrder3
Mov SI, 1FEh
StD
Rep MovsB
ClD
Mov AL, DL
StosB
D_InsertOrder3:
Pop SI
Jmp D_InsertOrderResume
EndP D_InsertOrder
;ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ
Proc D_LoadXM Far
Xor AX, AX
Call D_PreLoadModule
Assume DS:Nothing
Mov AH, 3Fh
Mov CX, 64 ; Header length
Mov DX, 64000
Int 21h
Mov AH, 3Fh ; Read rest of header.
Mov CX, [DS:64000+60]
Sub CX, 4
Mov DX, 64104
Int 21h
Mov DI, 4
Mov CX, 20
Mov SI, 64000+17
Rep MovsB
Xor AX, AX
Mov CX, 5
Rep StosW ; OK name transferred.
; Number of Instruments
Mov AX, [DS:64100+12]
StosW ; Insnum
Mov AX, 1
StosW
; Number of Patterns
Mov AX, [DS:64100+10]
StosW
Mov [ES:0C0h], AX ; Number of patterns.
; CWT/V, CMWT
Add DI, 4
; Flags
Mov AX, [DS:64100+14]
And AX, 1
ShL AX, 3
Or AX, 35h ; XM Effects, Old effects, stereo, insts
StosW
; Reserved
Xor AX, AX
StosW
; GVolume. MVolume
Mov AX, 128+48*256
StosW
; Initial Speed, Initial Tempo
Mov AL, [DS:64100+16]
Test AL, AL
JNZ InitialSpeedNot0
Mov AL, 6
InitialSpeedNot0:
Mov AH, [DS:64100+18]
StosW
; Separation
Mov AX, 128
StosW
; Message length, offset, timer
Xor AX, AX
Mov CX, 5
Rep StosW
; Channel Pan
Mov CX, [DS:64100+8] ; Number of channels
Mov AL, 32
Rep StosB
Mov AL, 128+32
Mov CX, 64
Sub CX, [DS:64100+8]
Rep StosB
; Channel Volume
Mov AL, 64
Mov CX, 64
Rep StosB
; Orders
Add DI, 40h
Mov SI, 64100+20 ; Orders
Mov CX, [DS:64100+4] ; Song legnth
JCXZ D_LoadXMNoPatterns2
D_FindMaximumPattern:
LodsB
Cmp AL, 200
JAE D_FindMaximumPattern3
Cmp AL, [ES:0C0h]
JB D_FindMaximumPattern2
Inc AX
Mov [ES:0C0h], AX
Dec AX
Jmp D_FindMaximumPattern2
D_FindMaximumPattern3:
Mov AL, 0FFh
D_FindMaximumPattern2:
StosB
Loop D_FindMaximumPattern
D_LoadXMNoPatterns2:
Mov CX, 256
Sub CX, [DS:64100+4]
Mov AL, 0FFh
Rep StosB
; OK.. now to load patterns.
Cmp Word Ptr [DS:64100+10], 0
JE D_LoadXMNoPatterns
Xor BP, BP
D_LoadXM1:
Push DS SI DI
Push CS
Pop DS
Assume DS:Disk
Mov SI, Offset PatternMsg
Mov AH, 5
Mov DI, (4+16*80)*2
Push BP
Call S_DrawString
Pop AX
Pop DI SI DS
Assume DS:Nothing
Mov AH, 3Fh
Mov CX, 4
Xor DX, DX
Int 21h ; Read pattern length
Mov AH, 3Fh
Mov CX, [DS:0]
Mov DX, 4
Sub CX, DX
Int 21h ; Read pattern header
Cmp Word Ptr [DS:7], 0
JE D_LoadXM3
Mov AH, 3Fh
Mov CX, [DS:7]
Mov DX, 100h
Mov SI, DX
Int 21h ; DS:100h contains all the
; pattern data.
Cmp BP, 200 ; Too many patterns?
JAE D_LoadXM3
Mov AX, [DS:5] ; AX = number of rows
Mov CX, [DS:64100+8] ; CX = number of channels
Mov DX, BP
Cmp AX, 200
JA D_LoadXM2
; TranslateXMPattern takes:
; DS:SI points to pattern data
; AX = rows
; CX = channels
; DX = pattern number
Call PE_TranslateXMPattern
Jmp D_LoadXM3
D_LoadXM2:
ShR AX, 1
Call PE_TranslateXMPattern
Mov DX, [ES:0C0h] ; DX = pattern number
Cmp DX, 200
JAE D_LoadXM3
Inc Word Ptr [ES:0C0h]
Call D_InsertOrder
Mov AX, [DS:5]
Inc AX
ShR AX, 1 ; AX = number of rows.
Call PE_TranslateXMPattern
D_LoadXM3:
Inc BP
Cmp BP, [DS:64100+10]
JB D_LoadXM1
D_LoadXMNoPatterns:
; Now to load instruments
Xor BP, BP
Cmp BP, [DS:64100+12]
JE D_LoadXMInstrumentTooMany
D_LoadXM4:
Push DS SI
Push CS
Pop DS
Mov SI, Offset InstrumentMsg
Mov AX, BP
Inc AX
Push AX
Mov AH, 5
Mov DI, (4+17*80)*2
Call S_DrawString
Pop AX
Pop SI DS
Mov AH, 3Fh
Mov CX, 4
Xor DX, DX
Int 21h
Mov AH, 3Fh
Mov CX, [DS:0]
Mov DX, 4
Sub CX, DX
Int 21h
; OK.. instrument loaded into DS:0..
Mov DI, BP
Add DI, DI
Mov DI, [ES:64712+DI] ; ES:DI points to instrument
Push DI
Mov SI, 4
Add DI, 20h
Mov CX, 22
Rep MovsB
Xor AX, AX
Mov CX, 4
Rep StosW
Pop DI
Cmp Word Ptr [DS:27], 0
JE D_LoadXMInstrumentEnd
Add DI, 14h ; DI points to fadeout
Mov AX, [DS:239]
Add AX, 15
ShR AX, 5
Cmp AX, 256
JBE D_LoadXMInstrument1
Mov AX, 256
D_LoadXMInstrument1:
StosW
Add DI, 40h-16h ; Translation table
Mov CX, 12 ; Kill first 12 entries.
Xor AX, AX
D_LoadXMInstrument2: ; First 12 entries cleared
StosW
Inc AX
Loop D_LoadXMInstrument2
Mov CX, 96
Mov SI, 33 ; Note translation
D_LoadXMInstrument3:
Mov AH, [SI]
Add AH, [ES:24h]
Cmp AH, 99
JBE D_LoadXMInstrument4
Mov AH, 99
D_LoadXMInstrument4:
StosW
Inc SI
Inc AX
Loop D_LoadXMInstrument3
Mov CX, 12 ; Kill first 12 entries.
Xor AH, AH
D_LoadXMInstrument5: ; First 12 entries cleared
StosW
Inc AX
Loop D_LoadXMInstrument5
; Now for volume envelope
Mov AL, [DS:233] ; Flags
Test AL, 1
JNZ D_LoadXMVolumeEnvelope
Mov AX, 205h
StosW
Xor AX, AX
StosW
StosW
Mov AL, 64
StosB
Xor AX, AX
StosW
StosB
Mov AX, 1
StosW
Mov CX, 70
Xor AX, AX
Rep StosB
Jmp D_LoadXMInstrumentVolumeFinished
D_LoadXMVolumeEnvelope:
; Mov CL, AL
; Mov AH, AL
; And AX, 402h
; ShR AH, 1
; ShL AL, 1
; Or AL, AH
; And CL, 1
; Or AL, CL
And AL, 2
ShL AL, 1
Or AL, 2+1 ; Volume envelope on, Loop on (always)
Mov AH, [DS:225] ; No of vol env nodes
Cmp AH, 12
JB D_NumXMVolNodes1
Mov AH, 12
D_NumXMVolNodes1:
StosW
Mov AX, [DS:228] ; Vol loop start+end
Test Byte Ptr [DS:233], 4 ; Volume loop?
JNZ VolumeLoopOK
Mov AL, [DS:225]
Dec AX
Mov AH, AL
VolumeLoopOK:
StosW
Mov AL, [DS:227] ; Vol Sustain point
Mov AH, AL
StosW
Cmp Byte Ptr [DS:233], 7
JNE D_XMVolumeNoSustain
Cmp AL, [DS:229] ; Compare sustain to endpoint
JB D_XMVolumeLoopOK
And Byte Ptr [ES:DI-6], Not 4
Jmp D_XMVolumeLoopOK
D_XMVolumeNoSustain:
Test Byte Ptr [DS:233], 2 ; Loop?
JNZ D_XMVolumeLoopOK
Mov AL, [DS:225] ; Number of nodes
Dec AX
Mov AH, AL
Mov [ES:DI-2], AX
Or Byte Ptr [ES:DI-6], 4
D_XMVolumeLoopOK:
; OK. now process volume env points
Mov CX, 12
Mov SI, 129
D_LoadXMInstrument6:
Mov AL, [SI+2]
Cmp AL, 64
JB D_LoadXMInstrument7
Mov AL, 64
D_LoadXMInstrument7:
StosB
MovsW
LodsW
Loop D_LoadXMInstrument6
Mov CX, 13*3+1
Xor AX, AX
Rep StosB
; Now for panning envelope
D_LoadXMInstrumentVolumeFinished:
Mov AL, [DS:234] ; Flags
Mov CL, AL
Mov AH, AL
And AX, 402h
ShR AH, 1
ShL AL, 1
Or AL, AH
And CL, 1
Or AL, CL
Mov AH, [DS:226] ; No of pan env nodes
Cmp AH, 12
JB D_NumXMPanNodes1
Mov AH, 12
D_NumXMPanNodes1:
StosW
Mov AX, [DS:231] ; Pan loop start+end
StosW
Mov AL, [DS:230] ; Pan Sustain point
Mov AH, AL
StosW
Test Byte Ptr [DS:234], 2 ; Panning envelope flags
JZ D_XMPanningLoopOK
Cmp AL, [DS:232] ; Compare sustain to endpoint
JB D_XMPanningLoopOK
And Byte Ptr [ES:DI-6], Not 4
D_XMPanningLoopOK:
; OK. now process panning env points
Mov CX, 12
Mov SI, 177
Xor AH, AH
D_LoadXMInstrument8:
Mov AL, [SI+2]
Cmp AL, 64
JB D_LoadXMInstrument9
Mov AL, 64
D_LoadXMInstrument9:
Sub AL, 32
StosB
MovsW
LodsW ; Add SI, 2
Loop D_LoadXMInstrument8
Mov AX, [DS:27]
Mul Word Ptr [DS:29]
Mov CX, AX
Mov AH, 3Fh
Mov DX, 1000h
Mov SI, DX
Int 21h
Mov CX, [DS:27] ; Update number of samples.
Mov AX, [ES:24h]
Add [ES:24h], CX
D_LoadXMSamples1:
Cmp AX, 99
JA D_LoadXMInstrumentTooMany
Cmp AX, [ES:24h]
JAE D_LoadXMInstrumentEnd
Push AX
Push SI
Mov DI, AX
Add DI, DI
Mov DI, [ES:64912+DI-2]
Add DI, 12h ; Skip filename, ID, GVL
Mov AH, [SI+12] ; Default volume
Mov AL, 0
Cmp DWord Ptr [SI], 0 ; Length = 0?
JE D_LoadXMSamples3
; Grab the panning value
Comment ~
Mov AL, [SI+15]
ShR AL, 1
Inc AX
ShR AL, 1
Push DI
Mov DI, BP
Add DI, DI
Mov DI, [ES:64712+DI]
Cmp Byte Ptr [ES:DI+19h], 32+128
JE XMNoPan2
Mov AL, 32
XMNoPan2:
Mov [ES:DI+19h], AL
XMNoPan:
Pop DI
~
; Sample present flag
Mov AL, 1
Mov CL, [SI+14]
Test CL, 10h ; 16 bit sample?
JZ D_LoadXMSamples2
Or AL, 2
D_LoadXMSamples2:
And CL, 3
JZ D_LoadXMSamples3 ; No loop
; CL = 1 or 2
Cmp DWord Ptr [SI+8], 1
JBE D_LoadXMSamples3
Or AL, 10h ; Loop
Dec CX
ShL CL, 6
Or AL, CL
D_LoadXMSamples3:
StosW
Push SI
; Copy sample name
Add SI, 18
Mov CX, 22/2
Rep MovsW
Xor AX, AX
StosW
StosW
Pop SI
; Conversion flags.
Mov AH, [SI+15]
ShR AH, 2
AdC AH, 80h
Mov AL, 5
StosW
Mov EAX, [SI]
Call LoadXISample5
Mov EAX, [SI+4]
Call LoadXISample5
Mov EAX, [SI+4]
Add EAX, [SI+8]
Call LoadXISample5
; C5speed..
Push ES
Push DI
Call Music_GetPitchTable ; Returns ES:DI
Mov AL, [SI+16] ; Relative note number
Add AL, 60 ; AL = note multiplier
And AX, 0FFh
ShL AX, 2
Add DI, AX
Mov ECX, [ES:DI]
Mov AL, [SI+13] ; Finetune, -128->+127
SAR AL, 4 ; Finetune = -8->+7
And AX, 0Fh
Add AX, AX
Mov DI, AX
MovZX EAX, [CS:FineTuneTable+DI]
Pop DI
Pop ES
Push EDX
Mul ECX
ShRD EAX, EDX, 16
Pop EDX
StosD ; C5freq
Xor AX, AX
StosW
StosW
StosW
StosW
; Now for file position
Mov AX, 4201h
Xor CX, CX
Xor DX, DX
Int 21h ; Returns DX:AX
StosW
Mov AX, DX
StosW
; Vibrato information
Mov AX, [DS:237]
XChg AH, AL
StosW
Mov DX, [DS:236]
And DX, 0FFh
Mov AX, 100h
Sub AX, DX
; Cmp AL, 64
; JBE VibratoLimit
;
; Mov AL, 64
;
; VibratoLimit:
Mov AH, [DS:235]
StosW
; Move file pointer forwards
Mov AX, 4201h
Mov CX, [SI+2]
Mov DX, [SI]
Int 21h
Pop SI
Pop AX
Add SI, [DS:29] ; Next sample header
Inc AX
Jmp D_LoadXMSamples1
D_LoadXMInstrumentEnd:
Inc BP
Cmp BP, 99
JA D_LoadXMInstrumentTooMany
Cmp BP, [DS:64100+12]
JB D_LoadXM4
D_LoadXMInstrumentTooMany:
Mov CX, 1 ; CX = sample number (base 1)
; DS = doesn't matter
; ES = songdata segment
D_LoadXMFinalSamples1: ; OK, now load the samples.
Push CX
Push ES
Mov SI, CX
Dec SI
Add SI, SI
Mov SI, [ES:64912+SI]
Test Byte Ptr [ES:SI+12h], 1
JZ D_LoadXMFinalSamples2
Push CS
Pop DS
Push SI
Mov SI, Offset SampleMsg
Mov DI, (4+18*80)*2
Mov AH, 5
Push CX
Call S_DrawString
Pop DI
Pop SI ; ES:SI points to sample header.
; DI = sample number+1
Push ES
Pop DS
Mov AX, 4200h
Xor CX, CX
Xor DX, DX
XChg CX, [DS:SI+4Ah]
XChg DX, [DS:SI+48h]
Int 21h ; Move file pointer.
Mov AX, DI
Dec AX
Call D_LoadSampleData
Jmp D_LoadXMFinalSamplesPresent
D_LoadXMFinalSamples2:
Mov DWord Ptr [SI+48h], 0
D_LoadXMFinalSamplesPresent:
Pop ES
Pop CX
Inc CX
Cmp CX, 100
JBE D_LoadXMFinalSamples1
Jmp D_PostLoadModule
EndP D_LoadXM
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Proc D_LoadMTM Far
Xor AX, AX
Call D_PreLoadModule
Assume DS:Nothing
Mov AH, 3Fh
Mov CX, 66 ; Song header length.
Mov DX, 60000
Int 21h
Mov DI, 4
Mov CX, 20
Mov SI, 60004
Rep MovsB
Xor AX, AX
Mov CX, 8
Rep StosB ; Song name.
Mov AL, [DS:60027]
StosW ; Order num
Xor AL, AL
StosW ; Inst num
Mov AL, [DS:60030]
StosW ; Sample number.
Mov AL, [DS:60026]
StosW ; Pattern number
Add DI, 4
; Mov AX, 101h ; Cwt/v 1.0
; StosW
; Mov AX, 100h ; Cmwt 1.0
; StosW
Mov AX, 31h ; Stereo. No Vol0Opt
StosW ; Use samples, old eff
Xor AX, AX
StosW
Mov AX, 3080h ; GlobalVol+MixVol
StosW
Mov AX, 7D06h
StosW
Mov AL, 128
StosB
Xor AL, AL
Mov CX, 11
Rep StosB
Mov CX, 32
Mov DX, 0
Xor AH, AH
; Panning positions
D_LoadMTM1:
Mov SI, 60034
Add SI, DX
Mov AL, [DS:SI]
Mov SI, AX
Mov AL, [CS:PanningPositions+SI]
StosB
Inc DX
Loop D_LoadMTM1
Mov CX, 32
Mov AL, 160
Rep StosB
Mov AL, 64
Mov CX, 64
Rep StosB
Push DS
Push CS
Pop DS
Assume DS:Disk
Mov SI, Offset SampleHeaderMsg
Mov AH, 5
Mov DI, (4+16*80)*2
Call S_DrawString
Pop DS
Assume DS:Nothing
Mov AL, 37
Mul Byte Ptr [ES:24h] ; AX = length of
; sample headers
Mov CX, AX ; length..
Mov AH, 3Fh ; read file..
Xor DX, DX
Int 21h
Mov DH, [ES:24h]
Mov DI, 55912 ; Start of samples.
Xor SI, SI ; DS:SI points to MTM header.
D_LoadMTM2:
Mov EAX, 'SPMI'
StosD
Xor AX, AX
Mov CX, 6
Rep StosW ; Clear file name.
StosB
Mov AL, 40h
StosB
Mov AL, [DS:SI+36]
And AL, 1
Add AL, AL
Cmp DWord Ptr [DS:SI+22], 0
JE D_LoadMTM3 ; Sample length = 0.
Or AL, 1 ; Else there's a sample.
D_LoadMTM3:
Mov ECX, [SI+30] ; Sample loop end
Sub ECX, [SI+26] ; Sample loop start
Cmp ECX, 2
JBE D_LoadMTM4
Or AL, 16
D_LoadMTM4:
StosB
Mov DL, AL
Mov AL, [DS:SI+35]
StosB
Push SI
Mov CX, 22
D_LoadMTMSampleName:
LodsB
StosB
And AL, AL
LoopNZ D_LoadMTMSampleName
Pop SI
Xor AL, AL
Add CX, 5
Rep StosB ; Filler.
Mov AL, 32
StosB
Mov EAX, [DS:SI+22]
StosD