ViBRA16 (SB16) updates to dos port
This commit is contained in:
pagefault
@@ -546,6 +546,15 @@ NEWSYM AdjustFrequency
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jne .nostereo8b
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cmp byte[SBHDMA],0
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jne .nostereo8b
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; *****************************************
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; *** ViBRA16X support by Peter Santing ***
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; *****************************************
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; before REALLY switching back to 8-bit sucky mono mode
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; check that we're dealing with a ViBRA16X Creative Labs Card
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cmp byte[vibracard], 1
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je .nostereo8b
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cmp dword[SoundQuality],2
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jbe .nostereo8b
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mov dword[SoundQuality],2
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@@ -562,9 +571,16 @@ NEWSYM AdjustFrequency
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mov ecx,[SoundQuality]
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mov eax,dword [SBToSPCSpeeds+ecx*4]
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; code for supporting vibra cards (coded by Peter Santing)
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cmp byte [vibracard], 1
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je .vibrafix
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cmp byte [SBHDMA],0
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je .not16bit
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mov eax,dword [SBToSPCSpeeds2+ecx*4]
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.vibrafix
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mov eax,dword [SBToSPCSpeeds2+ecx*4]
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.not16bit
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cmp byte[RaisePitch],0
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jne .nopitchmodify
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@@ -1581,6 +1597,7 @@ NEWSYM SBDMA, db 1
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NEWSYM SBDMAPage, db 83
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NEWSYM SBHDMA, db 0
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NEWSYM SBHDMAPage, db 0
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NEWSYM vibracard, db 0
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NEWSYM ResetSBDSP
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mov dx,[SBPort]
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@@ -4824,6 +4841,11 @@ NEWSYM handlersbseg
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cmp byte[SBHDMA],0
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jne near SBHandler16
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; code added by peter santing
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cmp byte[vibracard], 1
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je near SBHandler16
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push ebx
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push ecx
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push edx
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@@ -5423,6 +5445,10 @@ NEWSYM initSB
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; Set up SB
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call ResetSBDSP
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; code added by peter santing
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cmp byte [vibracard], 1
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je near .vibrafix2
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cmp byte [SBHDMA],0
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je .no16bit
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cmp byte [SBHDMA],4
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@@ -5549,6 +5575,98 @@ NEWSYM initSB
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.Versionnum dw 0
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; *****************************************
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; **** alternate ViBRA16X SB init code **** by Peter Santing
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; ***************************************** copied portions of original code
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; and modified it.
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.vibrafix2
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; Set Time-Constant Data ( = 256 - (1000000/sampling rate) )
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; 8000=131, 22050=210, 44100=233, 11025=165
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; Setup DMA
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; Select DMA channel
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mov al,[SBDMA]
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add al,4
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mov dx,000Ah
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out dx,al
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; Clear DMA
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mov al,00h
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mov dx,000Ch
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out dx,al
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; Set autoinit/write (set as DAC)
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mov al,58h
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add al,[SBDMA]
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mov dx,000Bh
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out dx,al
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; Send Offset Address
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mov al,[memoryloc]
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mov dl,[SBDMA]
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shl dl,1
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out dx,al
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mov al,[memoryloc+1]
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out dx,al
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; Send length of entire block
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mov ax,[BufferSizeW]
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shl ax, 1
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dec ax
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inc dx
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out dx,al
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mov al,ah
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out dx,al
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; Send page # (address/65536)
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mov al,[memoryloc+2]
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mov dh, 0
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mov dl,[SBDMAPage]
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out dx,al
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; turn on DMA
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mov al,[SBDMA]
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mov dx,000Ah
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out dx,al
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mov al,41h
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call WriteDSP
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push ecx
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mov ecx,[SoundQuality]
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mov al,byte [SBToSPCSpeeds2+ecx*4+1]
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pop ecx
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call WriteDSP
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push ecx
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mov ecx,[SoundQuality]
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mov al,byte [SBToSPCSpeeds2+ecx*4]
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pop ecx
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call WriteDSP
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; Prepare SB for the first block
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; 16-bit auto-init, mono, unsigned
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mov al,0B6h ; Sb 16 version (DSP 4)
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call WriteDSP
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cmp byte[StereoSound],1
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jne ._Mono
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._surround
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mov al,30h ; stereo/signed
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call WriteDSP
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jmp ._AfterStereo
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._Mono
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mov al,10h ; mono/signed
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call WriteDSP
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._AfterStereo
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; Send Length-1 to DSP port
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mov ax,[BufferSizeB]
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dec ax
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call WriteDSP
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mov al,ah
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call WriteDSP
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; Turn on speakers
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mov al,0D1h
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call WriteDSP
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jmp .fixsurround
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; ******* end of alternate SB init code for ViBRA ********
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.init16bitlowhdma
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; Set Time-Constant Data ( = 256 - (1000000/sampling rate) )
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; 8000=131, 22050=210, 44100=233, 11025=165
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@@ -22,7 +22,7 @@ EXTSYM ConvertJoyMap,ConvertJoyMap1,ConvertJoyMap2,printhex,InitSPC
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EXTSYM StartUp,PrintStr,WaitForKey,PrintChar,MMXCheck,ZFileSystemInit
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EXTSYM SPCDisable,SystemInit,allocmem
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EXTSYM xa
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EXTSYM SBPort,SBInt,SBIrq,SBDMA,SBDMAPage,SBHDMAPage,getenv
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EXTSYM SBPort,SBInt,SBIrq,SBDMA,SBDMAPage,SBHDMAPage,getenv,vibracard
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EXTSYM ram7fa,wramdataa
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EXTSYM malloc,free
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EXTSYM StateBackup
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@@ -128,6 +128,14 @@ NEWSYM mydebug, db '',13,10,0
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NEWSYM outofmem, db 'You don',39,'t have enough memory to run this program!',13,10,0
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%define ZVERSION '18 '
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;%define ZBETA 0
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; Line added by Peter Santing
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NEWSYM vibradetect
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db 'Creative ViBRA16X PnP card detected (support coded by Peter Santing)', 13, 10
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db 'High-DMA is below dma #4', 13, 10
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db 13,10, 'you have now full 16-bit stereo sound with the surround option!', 13, 10
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db 13,10, 'Press any key to continue', 13, 10,0
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NEWSYM welcome
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@@ -625,9 +633,53 @@ NEWSYM getblaster
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jne .dma3
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mov byte[SBDMAPage],82h
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.dma3
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cmp byte[SBHDMA],4
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jae .hdma
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mov byte[SBHDMA],0
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; ******************************************************
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; **** this piece of code is added by Peter Santing ****
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; **** it will enable ZSNES to use the full STEREO ****
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; **** capability of the ViBRA16X line of creative ****
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; **** instead of playing 8-bit MONOURAL sound ****
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; ******************************************************
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; cmp byte [SBHDMA], 0
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; jne .vibradma0
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; mov byte [SBDMAPage], 87h
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; mov byte [vibracard], 1 ; set ViBRA16X mode
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.vibradma0
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cmp byte [SBHDMA], 1
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jne .vibradma1
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mov byte [SBDMAPage], 83h
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mov byte [vibracard], 1 ; set ViBRA16X mode
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.vibradma1
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cmp byte [SBHDMA], 2
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jne .vibradma2
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mov byte [SBDMAPage], 81h
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mov byte [vibracard], 1 ; set ViBRA16X mode
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.vibradma2
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cmp byte [SBHDMA], 3
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jne .vibradma3
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mov byte [SBDMAPage], 82h
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mov byte [vibracard], 1 ; set ViBRA16X mode
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.vibradma3
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cmp byte [vibracard], 1
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jne .vibrafix
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push ax
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mov al, [SBHDMA]
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mov [SBDMA], al
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pop ax
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.vibrafix
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cmp byte [SBHDMA],4
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jae .hdma
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; vibra implementation (make sure that zSNES doesn't go back
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; to eight-bit-mode mono)
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mov byte [SBHDMA],0
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cmp byte[vibracard], 1
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jne .hdma
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push edx
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mov edx, vibradetect
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call PrintStr
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call WaitForKey
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pop edx
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; ********** END OF ViBRA16X implementation code **********
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.hdma
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cmp byte[SBHDMA],4
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jne .hdma4
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