mirror of https://github.com/snes9xgit/snes9x.git
679 lines
13 KiB
NASM
679 lines
13 KiB
NASM
;Copyright (C) 1997-2001 ZSNES Team ( zsknight@zsnes.com / _demo_@zsnes.com )
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;
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;This program is free software; you can redistribute it and/or
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;modify it under the terms of the GNU General Public License
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;as published by the Free Software Foundation; either
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;version 2 of the License, or (at your option) any later
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;version.
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;
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;This program is distributed in the hope that it will be useful,
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;but WITHOUT ANY WARRANTY; without even the implied warranty of
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;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;GNU General Public License for more details.
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;
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;You should have received a copy of the GNU General Public License
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;along with this program; if not, write to the Free Software
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;Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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%include "macros.mac"
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EXTSYM NumberOfOpcodes,SfxB,SfxBRAMR,SfxCBR,SfxCFGR,SfxCLSR,SfxCPB,SfxCROM
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EXTSYM SfxCarry,SfxMemTable,SfxOverflow,SfxPBR,SfxPIPE,SfxR0,SfxR1,SfxR10
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EXTSYM SfxR11,SfxR12,SfxR13,SfxR14,SfxR15,SfxR2,SfxR3,SfxR4,SfxR5,SfxR6
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EXTSYM SfxR7,SfxR8,SfxR9,SfxRAMBR,SfxRAMMem,SfxROMBR,SfxSCBR,SfxSCMR,SfxSFR
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EXTSYM SfxSignZero,SfxnRamBanks,StartSFX,regptr,regptw,sfxramdata
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EXTSYM SfxPOR,sfxclineloc,UpdatePORSCMR,UpdateCLSR,UpdateSCBRCOLR,SfxAC
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EXTSYM sfx128lineloc,sfx160lineloc,sfx192lineloc,sfxobjlineloc
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NEWSYM SfxProcAsmStart
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%include "regs.mac"
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%include "regsw.mac"
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%macro AssembleSFXFlags 0
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and word[SfxSFR],8F60h
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test byte[SfxCarry],1
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jz .nosfxcarry
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or word[SfxSFR],04h
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.nosfxcarry
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cmp word[SfxSignZero],0
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jne .nozero
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or word[SfxSFR],02h
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.nozero
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test word[SfxSignZero],8000h
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jz .noneg
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or word[SfxSFR],08h
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.noneg
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cmp byte[SfxOverflow],0
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je .noof
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or word[SfxSFR],10h
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.noof
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cmp byte[SfxB],0
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je .bzero
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or word[SfxSFR],1000h
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.bzero
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%endmacro
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NEWSYM initsfxregsr
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setreg 3000h*4,reg3000r
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setreg 3001h*4,reg3001r
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setreg 3002h*4,reg3002r
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setreg 3003h*4,reg3003r
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setreg 3004h*4,reg3004r
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setreg 3005h*4,reg3005r
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setreg 3006h*4,reg3006r
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setreg 3007h*4,reg3007r
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setreg 3008h*4,reg3008r
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setreg 3009h*4,reg3009r
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setreg 300Ah*4,reg300Ar
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setreg 300Bh*4,reg300Br
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setreg 300Ch*4,reg300Cr
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setreg 300Dh*4,reg300Dr
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setreg 300Eh*4,reg300Er
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setreg 300Fh*4,reg300Fr
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setreg 3010h*4,reg3010r
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setreg 3011h*4,reg3011r
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setreg 3012h*4,reg3012r
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setreg 3013h*4,reg3013r
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setreg 3014h*4,reg3014r
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setreg 3015h*4,reg3015r
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setreg 3016h*4,reg3016r
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setreg 3017h*4,reg3017r
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setreg 3018h*4,reg3018r
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setreg 3019h*4,reg3019r
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setreg 301Ah*4,reg301Ar
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setreg 301Bh*4,reg301Br
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setreg 301Ch*4,reg301Cr
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setreg 301Dh*4,reg301Dr
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setreg 301Eh*4,reg301Er
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setreg 301Fh*4,reg301Fr
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setreg 3030h*4,reg3030r
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setreg 3031h*4,reg3031r
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setreg 3032h*4,reg3032r
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setreg 3033h*4,reg3033r
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setreg 3034h*4,reg3034r
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setreg 3035h*4,reg3035r
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setreg 3036h*4,reg3036r
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setreg 3037h*4,reg3037r
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setreg 3038h*4,reg3038r
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setreg 3039h*4,reg3039r
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setreg 303Ah*4,reg303Ar
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setreg 303Bh*4,reg303Br
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setreg 303Ch*4,reg303Cr
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setreg 303Dh*4,reg303Dr
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setreg 303Eh*4,reg303Er
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setreg 303Fh*4,reg303Fr
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; set 3100-31FF to cacheregr
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mov edi,3100h*4
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add edi,[regptr]
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mov eax,cacheregr
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mov ecx,200h
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.loop
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mov [edi],eax
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add edi,4
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dec ecx
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jnz .loop
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ret
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NEWSYM initsfxregsw
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setregw 3000h*4,reg3000w
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setregw 3001h*4,reg3001w
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setregw 3002h*4,reg3002w
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setregw 3003h*4,reg3003w
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setregw 3004h*4,reg3004w
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setregw 3005h*4,reg3005w
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setregw 3006h*4,reg3006w
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setregw 3007h*4,reg3007w
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setregw 3008h*4,reg3008w
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setregw 3009h*4,reg3009w
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setregw 300Ah*4,reg300Aw
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setregw 300Bh*4,reg300Bw
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setregw 300Ch*4,reg300Cw
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setregw 300Dh*4,reg300Dw
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setregw 300Eh*4,reg300Ew
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setregw 300Fh*4,reg300Fw
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setregw 3010h*4,reg3010w
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setregw 3011h*4,reg3011w
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setregw 3012h*4,reg3012w
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setregw 3013h*4,reg3013w
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setregw 3014h*4,reg3014w
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setregw 3015h*4,reg3015w
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setregw 3016h*4,reg3016w
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setregw 3017h*4,reg3017w
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setregw 3018h*4,reg3018w
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setregw 3019h*4,reg3019w
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setregw 301Ah*4,reg301Aw
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setregw 301Bh*4,reg301Bw
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setregw 301Ch*4,reg301Cw
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setregw 301Dh*4,reg301Dw
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setregw 301Eh*4,reg301Ew
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setregw 301Fh*4,reg301Fw
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setregw 3030h*4,reg3030w
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setregw 3031h*4,reg3031w
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setregw 3032h*4,reg3032w
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setregw 3033h*4,reg3033w
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setregw 3034h*4,reg3034w
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setregw 3035h*4,reg3035w
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setregw 3036h*4,reg3036w
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setregw 3037h*4,reg3037w
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setregw 3038h*4,reg3038w
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setregw 3039h*4,reg3039w
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setregw 303Ah*4,reg303Aw
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setregw 303Bh*4,reg303Bw
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setregw 303Ch*4,reg303Cw
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setregw 303Dh*4,reg303Dw
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setregw 303Eh*4,reg303Ew
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setregw 303Fh*4,reg303Fw
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; set 3100-31FF to cacheregw
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mov edi,3100h*4
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add edi,[regptw]
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mov eax,cacheregw
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mov ecx,200h
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.loop
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mov [edi],eax
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add edi,4
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dec ecx
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jnz .loop
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ret
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NEWSYM cacheregr
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or byte[cachewarning],1
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ret
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NEWSYM cacheregw
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or byte[cachewarning],2
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ret
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SECTION .bss
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NEWSYM cachewarning, resb 1
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NEWSYM SFXProc, resd 1
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NEWSYM ChangeOps, resd 1
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SECTION .text
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; SFX Registers
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NEWSYM reg3000r
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mov al,[SfxR0]
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ret
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NEWSYM reg3001r
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mov al,[SfxR0+1]
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ret
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NEWSYM reg3002r
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mov al,[SfxR1]
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ret
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NEWSYM reg3003r
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mov al,[SfxR1+1]
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ret
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NEWSYM reg3004r
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mov al,[SfxR2]
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ret
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NEWSYM reg3005r
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mov al,[SfxR2+1]
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ret
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NEWSYM reg3006r
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mov al,[SfxR3]
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ret
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NEWSYM reg3007r
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mov al,[SfxR3+1]
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ret
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NEWSYM reg3008r
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mov al,[SfxR4]
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ret
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NEWSYM reg3009r
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mov al,[SfxR4+1]
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ret
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NEWSYM reg300Ar
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mov al,[SfxR5]
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ret
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NEWSYM reg300Br
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mov al,[SfxR5+1]
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ret
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NEWSYM reg300Cr
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mov al,[SfxR6]
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ret
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NEWSYM reg300Dr
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mov al,[SfxR6+1]
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ret
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NEWSYM reg300Er
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mov al,[SfxR7]
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ret
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NEWSYM reg300Fr
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mov al,[SfxR7+1]
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ret
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NEWSYM reg3010r
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mov al,[SfxR8]
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ret
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NEWSYM reg3011r
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mov al,[SfxR8+1]
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ret
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NEWSYM reg3012r
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mov al,[SfxR9]
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ret
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NEWSYM reg3013r
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mov al,[SfxR9+1]
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ret
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NEWSYM reg3014r
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mov al,[SfxR10]
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ret
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NEWSYM reg3015r
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mov al,[SfxR10+1]
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ret
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NEWSYM reg3016r
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mov al,[SfxR11]
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ret
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NEWSYM reg3017r
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mov al,[SfxR11+1]
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ret
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NEWSYM reg3018r
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mov al,[SfxR12]
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ret
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NEWSYM reg3019r
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mov al,[SfxR12+1]
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ret
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NEWSYM reg301Ar
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mov al,[SfxR13]
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ret
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NEWSYM reg301Br
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mov al,[SfxR13+1]
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ret
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NEWSYM reg301Cr
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mov al,[SfxR14]
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ret
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NEWSYM reg301Dr
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mov al,[SfxR14+1]
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ret
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NEWSYM reg301Er
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mov al,[SfxR15]
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ret
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NEWSYM reg301Fr
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mov al,[SfxR15+1]
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ret
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; Other SFX stuff
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NEWSYM reg3030r
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AssembleSFXFlags
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mov al,[SfxSFR]
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ret
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NEWSYM reg3031r
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cmp byte[SfxAC],1
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je .alwaysclear
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cmp dword[ChangeOps],-350*240
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jl .noclear
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.alwaysclear
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and byte[SfxSFR+1],07fh ; clear IRQ flag
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jmp .cleared
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.noclear
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cmp dword[ChangeOps],-350*240*4
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jge .clear
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mov dword[ChangeOps],-350*240*4
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jmp .cleared
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.clear
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add dword[ChangeOps],350*240
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.cleared
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mov al,[SfxSFR+1]
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ret
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SECTION .bss
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.test resb 1
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SECTION .text
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NEWSYM reg3032r ; Unused
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xor al,al
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ret
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NEWSYM reg3033r ; BRAMR Backup Ram Read only on/off (bits 1-15 unused)
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mov al,[SfxBRAMR]
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ret
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NEWSYM reg3034r ; PBR (Program Bank)
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mov al,[SfxPBR]
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ret
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NEWSYM reg3035r ; Unused
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xor al,al
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ret
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NEWSYM reg3036r ; ROMBR (Gamepak Rom Bank Register)
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mov al,[SfxROMBR]
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ret
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NEWSYM reg3037r ; CFGR (Control Flags Register)
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mov al,[SfxCFGR]
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ret
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NEWSYM reg3038r ; SCBR (Screen Bank Register)
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mov al,[SfxSCBR]
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ret
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NEWSYM reg3039r ; CLSR (Clock Speed Register)
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mov al,[SfxCLSR]
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ret
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NEWSYM reg303Ar ; SCMR (Screen Mode Register)
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mov al,[SfxSCMR]
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test byte[SfxPOR],10h
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jnz .objmode
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mov al,[SfxSCMR]
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and al,00100100b ; 4 + 32
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cmp al,4
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je .lines160
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cmp al,32
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je .lines192
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cmp al,36
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je .objmode
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mov eax,[sfx128lineloc]
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jmp .donelines
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.lines160
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mov eax,[sfx160lineloc]
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jmp .donelines
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.lines192
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mov eax,[sfx192lineloc]
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jmp .donelines
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.objmode
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mov eax,[sfxobjlineloc]
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.donelines
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mov [sfxclineloc],eax
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ret
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NEWSYM reg303Br ; VCR (Version Code Register)
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mov al,20h
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ret
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NEWSYM reg303Cr ; RAMBR (Ram bank register)
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mov al,[SfxRAMBR]
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ret
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NEWSYM reg303Dr ; Unused
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xor al,al
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ret
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NEWSYM reg303Er ; CBR (Cache Base Register), lower byte
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mov al,[SfxCBR]
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ret
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NEWSYM reg303Fr ; CBR (Cache Base Register), upper byte
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mov al,[SfxCBR+1]
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ret
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; SFX Write Registers
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NEWSYM reg3000w
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mov [SfxR0],al
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ret
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NEWSYM reg3001w
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mov [SfxR0+1],al
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ret
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NEWSYM reg3002w
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mov [SfxR1],al
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ret
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NEWSYM reg3003w
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mov [SfxR1+1],al
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ret
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NEWSYM reg3004w
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mov [SfxR2],al
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ret
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NEWSYM reg3005w
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mov [SfxR2+1],al
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ret
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NEWSYM reg3006w
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mov [SfxR3],al
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ret
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NEWSYM reg3007w
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mov [SfxR3+1],al
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ret
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NEWSYM reg3008w
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mov [SfxR4],al
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ret
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NEWSYM reg3009w
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mov [SfxR4+1],al
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ret
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NEWSYM reg300Aw
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mov [SfxR5],al
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ret
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NEWSYM reg300Bw
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mov [SfxR5+1],al
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ret
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NEWSYM reg300Cw
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mov [SfxR6],al
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ret
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NEWSYM reg300Dw
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mov [SfxR6+1],al
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ret
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NEWSYM reg300Ew
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mov [SfxR7],al
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ret
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NEWSYM reg300Fw
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mov [SfxR7+1],al
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ret
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NEWSYM reg3010w
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mov [SfxR8],al
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ret
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NEWSYM reg3011w
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mov [SfxR8+1],al
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ret
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NEWSYM reg3012w
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mov [SfxR9],al
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ret
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NEWSYM reg3013w
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mov [SfxR9+1],al
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ret
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NEWSYM reg3014w
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mov [SfxR10],al
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ret
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NEWSYM reg3015w
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mov [SfxR10+1],al
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ret
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NEWSYM reg3016w
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mov [SfxR11],al
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ret
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NEWSYM reg3017w
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mov [SfxR11+1],al
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ret
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NEWSYM reg3018w
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mov [SfxR12],al
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ret
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NEWSYM reg3019w
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mov [SfxR12+1],al
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ret
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NEWSYM reg301Aw
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mov [SfxR13],al
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ret
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NEWSYM reg301Bw
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mov [SfxR13+1],al
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ret
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NEWSYM reg301Cw
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mov [SfxR14],al
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ret
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NEWSYM reg301Dw
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mov [SfxR14+1],al
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ret
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NEWSYM reg301Ew
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mov [SfxR15],al
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ret
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NEWSYM reg301Fw
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mov [SfxR15+1],al
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; start execution
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push edx
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mov edx,[SfxPBR]
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mov edx,[SfxMemTable+edx*4]
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add edx,[SfxR15]
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mov dl,[edx]
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mov [SfxPIPE],dl
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pop edx
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inc word[SfxR15]
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or byte[SfxSFR],20h
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or dword [SfxSFR],08000h ; Set IRQ Flag
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mov dword[SFXProc],1
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; call StartSFXret
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ret
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; Other SFX stuff
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NEWSYM reg3030w
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mov [SfxSFR],al
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; mov dh,10
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; Disassemble Flags
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test al,20h
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jz .noexec
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mov dword [NumberOfOpcodes],100
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call StartSFX
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.noexec
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ret
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NEWSYM reg3031w
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mov [SfxSFR+1],al
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ret
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NEWSYM reg3032w ; Unused
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ret
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NEWSYM reg3033w ; BRAMR Backup Ram Read only on/off (bits 1-15 unused)
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and al,0FEh
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mov [SfxBRAMR],al
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ret
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NEWSYM reg3034w ; PBR (Program Bank)
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mov [SfxPBR],al
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xor ebx,ebx
|
|
mov bl,al
|
|
mov ebx,[SfxMemTable+ebx*4]
|
|
mov [SfxCPB],ebx
|
|
ret
|
|
NEWSYM reg3035w ; Unused
|
|
ret
|
|
NEWSYM reg3036w ; ROMBR (Gamepak Rom Bank Register)
|
|
mov [SfxROMBR],al
|
|
xor ebx,ebx
|
|
mov bl,al
|
|
mov ebx,[SfxMemTable+ebx*4]
|
|
mov [SfxCROM],ebx
|
|
ret
|
|
NEWSYM reg3037w ; CFGR (Control Flags Register)
|
|
mov [SfxCFGR],al
|
|
ret
|
|
NEWSYM reg3038w ; SCBR (Screen Bank Register)
|
|
mov [SfxSCBR],al
|
|
call UpdateSCBRCOLR
|
|
ret
|
|
NEWSYM reg3039w ; CLSR (Clock Speed Register)
|
|
and al,0FEh
|
|
mov [SfxCLSR],al
|
|
call UpdateCLSR
|
|
ret
|
|
NEWSYM reg303Aw ; SCMR (Screen Mode Register)
|
|
mov [SfxSCMR],al
|
|
call UpdatePORSCMR
|
|
ret
|
|
NEWSYM reg303Bw ; VCR (Version Code Register)
|
|
ret
|
|
NEWSYM reg303Cw ; RAMBR (Ram bank register)
|
|
mov bl,[SfxnRamBanks]
|
|
dec bl
|
|
and al,bl
|
|
mov ebx,[SfxnRamBanks]
|
|
dec ebx
|
|
and eax,ebx
|
|
mov [SfxRAMBR],eax
|
|
xor ebx,ebx
|
|
mov bl,al
|
|
shl ebx,16
|
|
add ebx,[sfxramdata]
|
|
mov dword [SfxRAMMem],ebx
|
|
ret
|
|
NEWSYM reg303Dw ; Unused
|
|
ret
|
|
NEWSYM reg303Ew ; CBR (Cache Base Register), lower byte
|
|
mov [SfxCBR],al
|
|
ret
|
|
NEWSYM reg303Fw ; CBR (Cache Base Register), upper byte
|
|
mov [SfxCBR+1],al
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankr8
|
|
mov ebx,[sfxramdata]
|
|
mov al,[ebx+ecx]
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankw8
|
|
mov ebx,[sfxramdata]
|
|
mov [ebx+ecx],al
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankr16
|
|
mov ebx,[sfxramdata]
|
|
mov ax,[ebx+ecx]
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankw16
|
|
mov ebx,[sfxramdata]
|
|
mov [ebx+ecx],ax
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankr8b
|
|
mov ebx,[sfxramdata]
|
|
mov al,[ebx+ecx+65536]
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankw8b
|
|
mov ebx,[sfxramdata]
|
|
mov [ebx+ecx+65536],al
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankr16b
|
|
mov ebx,[sfxramdata]
|
|
mov ax,[ebx+ecx+65536]
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankw16b
|
|
mov ebx,[sfxramdata]
|
|
mov [ebx+ecx+65536],ax
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankr8c
|
|
mov ebx,[sfxramdata]
|
|
mov al,[ebx+ecx+65536*2]
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankw8c
|
|
mov ebx,[sfxramdata]
|
|
mov [ebx+ecx+65536*2],al
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankr16c
|
|
mov ebx,[sfxramdata]
|
|
mov ax,[ebx+ecx+65536*2]
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankw16c
|
|
mov ebx,[sfxramdata]
|
|
mov [ebx+ecx+65536*2],ax
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankr8d
|
|
mov ebx,[sfxramdata]
|
|
mov al,[ebx+ecx+65536*3]
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankw8d
|
|
mov ebx,[sfxramdata]
|
|
mov [ebx+ecx+65536*3],al
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankr16d
|
|
mov ebx,[sfxramdata]
|
|
mov ax,[ebx+ecx+65536*3]
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM sfxaccessbankw16d
|
|
mov ebx,[sfxramdata]
|
|
mov [ebx+ecx+65536*3],ax
|
|
xor ebx,ebx
|
|
ret
|
|
|
|
NEWSYM SfxProcAsmEnd
|