snes9x/i386/sfxproc.asm

679 lines
13 KiB
NASM

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