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ZSNES/zsnes/src/chips/sa1regs.asm

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;Copyright (C) 1997-2006 ZSNES Team ( zsKnight, _Demo_, pagefault, Nach )
;
;http://www.zsnes.com
;http://sourceforge.net/projects/zsnes
;
;This program is free software; you can redistribute it and/or
;modify it under the terms of the GNU General Public License
;version 2 as published by the Free Software Foundation.
;
;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.
; SPC7110 emulation. Information fully reverse engineered
; by Dark Force and John Weidman, ZSNES code by zsKnight
; SA-1 emulation. Information provided by Ivar of Snes9x.
; coded by zsKnight
; SDD-1 emulation. SDD-1 MMC reverse engineered by zsKnight,
; SDD-1 decompress Dark Force and John Weidman,
; - Add MMC support
; - Add end of DMA IRQ support
; - Add Char Conversion #1
; - Add Char Conversion #2
; - Add Memory Disables (Guess this isn't needed)
; IRQs - IRQ Clear (also clear 2300), IRQ Disable, and IRQ Enable
; Mario RPG Level-up not working - it was using one of the IRQ functions
; that no other place in the game is using, which I suppose is the cause
; of the problem, but it's been so long since I worked on SA-1, that
; I forgot which part.
%include "macros.mac"
EXTSYM regptr,regptw,romdata,SA1Status,debstop4,SDD1BankA,curromsize,debuggeron
EXTSYM Get_Time,Get_TimeDate,spc7110romptr,SPC7110Entries,SPC7110IndexSize
EXTSYM SPC7110nfname,SPC7110filep,SPC7_Convert_Upper,SPC7_Convert_Lower
EXTSYM Open_File,Close_File,Read_File,File_Seek,irqv2,irqv,nmiv2,nmiv,snesmmap
EXTSYM snesmap2,curypos,CurrentExecSA1,memaccessbankr8sdd1,memtabler8,AddrNoIncr
EXTSYM NumofBanks,BWUsed2
%include "cpu/regs.mac"
%include "cpu/regsw.mac"
SECTION .data
NEWSYM SPCMultA, dd 0
NEWSYM SPCMultB, dd 0
NEWSYM SPCDivEnd, dd 0
NEWSYM SPCMulRes, dd 0
NEWSYM SPCDivRes, dd 0
NEWSYM SPC7110BankA, dd 020100h
NEWSYM SPC7110RTCStat, dd 0
NEWSYM SPC7110RTC, db 00,00,00,00,00,00,01,00,01,00,00,00,00,00,0Fh,00
NEWSYM SPC7110RTCB, db 00,00,00,00,00,00,01,00,01,00,00,00,00,01,0Fh,06
NEWSYM SPCROMPtr, dd 0
NEWSYM SPCROMtoI, dd SPCROMPtr
NEWSYM SPCROMAdj, dd 0
NEWSYM SPCROMInc, dd 0
NEWSYM SPCROMCom, dd 0
NEWSYM SPCCompPtr, dd 0
NEWSYM SPCDecmPtr, dd 0
NEWSYM SPCCompCounter, dd 0
NEWSYM SPCCompCommand, dd 0
NEWSYM SPCCheckFix, dd 0
NEWSYM SPCSignedVal, dd 0
num2writespc7110reg equ $-SPCMultA
NEWSYM PHnum2writespc7110reg, dd num2writespc7110reg
NEWSYM RTCData, db 0Fh,0,0,0,0,0,0,0,0,0,0,0,0,0,0Fh,0
NEWSYM RTCPtr, dd 0
NEWSYM RTCPtr2, dd 0
NEWSYM RTCRest, dd 0
NEWSYM SPC7110TempPosition, dd 0
NEWSYM SPC7110TempLength, dd 0
NEWSYM SPCPrevCompPtr, dd 0
SECTION .text
RTC2800:
push ebx
cmp dword[RTCRest],100
; je .go
; inc dword[RTCRest]
; jmp .notfirst
.go
cmp dword[RTCPtr],0
jne near .notfirst
cmp byte[debuggeron],1
je near .notfirst
; fill time/date
push ebx
push eax
call Get_Time
mov bl,al
and bl,0Fh
mov [RTCData+1],bl ; seconds
shr eax,4
mov bl,al
and bl,0Fh
mov [RTCData+2],bl
; jmp .done
shr eax,4
cmp word[RTCData+1],0
; jne .notminch
mov bl,al
and bl,0Fh
mov [RTCData+3],bl ; minutes
shr eax,4
mov bl,al
and bl,0Fh
mov [RTCData+4],bl
.notminch
; jmp .done
shr eax,4
mov bl,al
and bl,0Fh
mov [RTCData+5],bl ; hours
shr eax,4
mov bl,al
and bl,0Fh
mov [RTCData+6],bl
call Get_TimeDate
mov bl,al
and bl,0Fh
mov [RTCData+7],bl ; day
shr eax,4
mov bl,al
and bl,0Fh
mov bl,al
and bl,0Fh
mov [RTCData+8],bl
shr eax,4
mov bl,al
and bl,0Fh
mov [RTCData+9],bl ; month
shr eax,8
mov bl,al
and bl,0Fh
mov [RTCData+10],bl ; year
shr eax,4
mov bl,al
and bl,01Fh
xor bh,bh
.notokay
cmp bl,9
jbe .okay
inc bh
sub bl,10
jmp .notokay
.okay
mov [RTCData+11],bl
add bh,9
mov [RTCData+12],bh
shr eax,8
and al,0Fh
mov [RTCData+13],al ; day of week
.done
pop eax
pop ebx
.notfirst
mov ebx,[RTCPtr]
mov al,[RTCData+ebx]
inc dword[RTCPtr]
cmp dword[RTCPtr],0Fh
jne .notclear
mov dword[RTCPtr],0
.notclear
pop ebx
ret
RTC2801w:
; mov byte[debstop3],1
mov dword[RTCRest],0
mov dword[RTCPtr],0
cmp al,0Eh
jne .notreset
mov dword[RTCPtr2],0
ret
.notreset
cmp al,0Dh
jne .notstop
mov dword[RTCPtr2],0
ret
.notstop
push ebx
mov ebx,[RTCPtr2]
cmp ebx,0
je .next
cmp ebx,13
ja .nomore
mov [RTCData+ebx],al
.next
inc dword[RTCPtr2]
.nomore
pop ebx
ret
NEWSYM RTCinit
mov dword[RTCPtr],0
ret
NEWSYM RTCReset
setreg 2800h*4,RTC2800
ret
NEWSYM RTCReset2
setregw 2801h*4,RTC2801w
ret
SPC4850:
mov al,[SPC7110RTC]
ret
SPC4851:
mov al,[SPC7110RTC+01h]
ret
SPC4852:
mov al,[SPC7110RTC+02h]
ret
SPC4853:
mov al,[SPC7110RTC+03h]
ret
SPC4854:
mov al,[SPC7110RTC+04h]
ret
SPC4855:
mov al,[SPC7110RTC+05h]
ret
SPC4856:
mov al,[SPC7110RTC+06h]
ret
SPC4857:
mov al,[SPC7110RTC+07h]
ret
SPC4858:
mov al,[SPC7110RTC+08h]
ret
SPC4859:
mov al,[SPC7110RTC+09h]
ret
SPC485A:
mov al,[SPC7110RTC+0Ah]
ret
SPC485B:
mov al,[SPC7110RTC+0Bh]
ret
SPC485C:
mov al,[SPC7110RTC+0Ch]
ret
SPC485D:
mov al,[SPC7110RTC+0Dh]
ret
SPC485E:
mov al,[SPC7110RTC+0Eh]
ret
SPC485F:
mov al,[SPC7110RTC+0Fh]
ret
SECTION .bss
NEWSYM SPCDecompFin, resd 1
SECTION .text
NEWSYM SPC7110init
mov dword[SPCMultA],0
mov dword[SPCMultB],0
mov dword[SPCDivEnd],0
mov dword[SPCMulRes],0
mov dword[SPCDivRes],0
mov dword[SPC7110BankA],020100h
mov dword[SPC7110RTCStat],0
mov dword[SPC7110RTCStat],0
mov dword[SPCROMPtr],0
mov dword[SPCROMtoI],SPCROMPtr
mov dword[SPCROMAdj],0
mov dword[SPCROMInc],0
mov dword[SPCROMCom],0
mov dword[SPCDecompFin],0
mov dword[SPCCompPtr],0
mov dword[SPCDecmPtr],0
mov dword[SPCCompCounter],0
mov dword[SPCCompCommand],0
mov dword[SPCCheckFix],0
mov dword[SPCPrevCompPtr],0
ret
NEWSYM SPC7110Reset
setregw 4801h*4,SPC4801w
setregw 4802h*4,SPC4802w
setregw 4803h*4,SPC4803w
setregw 4804h*4,SPC4804w
setregw 4805h*4,SPC4805w
setregw 4806h*4,SPC4806w
setregw 4807h*4,SPC4807w
setregw 4808h*4,SPC4808w
setregw 4809h*4,SPC4809w
setregw 480Ah*4,SPC480Aw
setregw 480Bh*4,SPC480Bw
setregw 4811h*4,SPC4811w
setregw 4812h*4,SPC4812w
setregw 4813h*4,SPC4813w
setregw 4814h*4,SPC4814w
setregw 4815h*4,SPC4815w
setregw 4816h*4,SPC4816w
setregw 4817h*4,SPC4817w
setregw 4818h*4,SPC4818w
setregw 4820h*4,SPC4820w
setregw 4821h*4,SPC4821w
setregw 4822h*4,SPC4822w
setregw 4823h*4,SPC4823w
setregw 4824h*4,SPC4824w
setregw 4825h*4,SPC4825w
setregw 4826h*4,SPC4826w
setregw 4827h*4,SPC4827w
setregw 482Eh*4,SPC482Ew
setregw 4831h*4,SPC4831w
setregw 4832h*4,SPC4832w
setregw 4833h*4,SPC4833w
setregw 4840h*4,SPC4840w
setregw 4841h*4,SPC4841w
setregw 4842h*4,SPC4842w
ret
NEWSYM initSPC7110regs
setreg 4800h*4,SPC4800
setreg 4801h*4,SPC4801
setreg 4802h*4,SPC4802
setreg 4803h*4,SPC4803
setreg 4804h*4,SPC4804
setreg 4805h*4,SPC4805
setreg 4806h*4,SPC4806
setreg 4807h*4,SPC4807
setreg 4808h*4,SPC4808
setreg 4809h*4,SPC4809
setreg 480Ah*4,SPC480A
setreg 480Bh*4,SPC480B
setreg 480Ch*4,SPC480C
setreg 4810h*4,SPC4810
setreg 4811h*4,SPC4811
setreg 4812h*4,SPC4812
setreg 4813h*4,SPC4813
setreg 4814h*4,SPC4814
setreg 4815h*4,SPC4815
setreg 4816h*4,SPC4816
setreg 4817h*4,SPC4817
setreg 4818h*4,SPC4818
setreg 481Ah*4,SPC481A
setreg 4820h*4,SPC4820
setreg 4821h*4,SPC4821
setreg 4822h*4,SPC4822
setreg 4823h*4,SPC4823
setreg 4824h*4,SPC4824
setreg 4825h*4,SPC4825
setreg 4826h*4,SPC4826
setreg 4827h*4,SPC4827
setreg 4828h*4,SPC4828
setreg 4829h*4,SPC4829
setreg 482Ah*4,SPC482A
setreg 482Bh*4,SPC482B
setreg 482Ch*4,SPC482C
setreg 482Dh*4,SPC482D
setreg 482Eh*4,SPC482E
setreg 482Fh*4,SPC482F
setreg 4831h*4,SPC4831
setreg 4832h*4,SPC4832
setreg 4833h*4,SPC4833
setreg 4834h*4,SPC4834
setreg 4840h*4,SPC4840
setreg 4841h*4,SPC4841
setreg 4842h*4,SPC4842
setreg 4850h*4,SPC4850
setreg 4851h*4,SPC4851
setreg 4852h*4,SPC4852
setreg 4853h*4,SPC4853
setreg 4854h*4,SPC4854
setreg 4855h*4,SPC4855
setreg 4856h*4,SPC4856
setreg 4857h*4,SPC4857
setreg 4858h*4,SPC4858
setreg 4859h*4,SPC4859
setreg 485Ah*4,SPC485A
setreg 485Bh*4,SPC485B
setreg 485Ch*4,SPC485C
setreg 485Dh*4,SPC485D
setreg 485Eh*4,SPC485E
setreg 485Fh*4,SPC485F
ret
%macro BankSwitchSPC7110 2
push ecx
push edx
push eax
mov [SPC7110BankA+%1],al
inc al
cmp byte[curromsize],13
jne .mbit24
.mbit40
cmp al,5
jb .okaymbit
sub al,4
jmp .mbit40
.mbit24
cmp al,3
jb .okaymbit
sub al,2
jmp .mbit24
.okaymbit
and eax,07h
shl eax,20
add eax,[romdata]
mov ecx,10h
mov ebx,snesmap2+%2*4
mov edx,snesmmap+%2*4
.mmaploop2
mov [ebx],eax
mov [edx],eax
add eax,10000h
add ebx,4
add edx,4
dec ecx
jnz .mmaploop2
pop eax
pop edx
pop ecx
ret
%endmacro
NEWSYM LastLog
pushad
cmp byte[CurValUsed],0
je near .novalue
xor ebx,ebx
mov edx,DecompArray
mov eax,[CurPtrVal]
cmp dword[DecompAPtr],0
je .noptr
.loop
mov ecx,[edx]
cmp ecx,eax
je .match
add edx,8
inc ebx
cmp ebx,[DecompAPtr]
jne .loop
.noptr
cmp dword[DecompAPtr],8192
je .novalue
mov [edx],eax
xor eax,eax
mov ax,[CurDecompSize]
mov [edx+4],ax
mov ax,[CurPtrLen]
mov [edx+6],ax
mov al,[CurPtrLen+2]
mov [edx+3],al
inc dword[DecompAPtr]
jmp .novalue
.match
add edx,4
mov bx,[CurDecompSize]
xor ebx,ebx
cmp [edx],bx
jae .novalue
mov [edx],bx
.novalue
mov [lastentry],edx
mov byte[CurValUsed],1
mov eax,[SPCCompPtr]
and eax,0FFFFFFh
mov [CurPtrVal],eax
popad
ret
SPC4800:
; mov byte[debstop3],1
; cmp word[SPCCompCounter],0FFFFh
; jne .notzero
; xor al,al
; ret
;.notzero
cmp byte[SPCCompCommand],0
je .manual
xor al,al
dec word[SPCCompCounter]
push ebx
xor ebx,ebx
; mov ebx,[SPCCompPtr]
; and ebx,0FFFFFFh
; add ebx,[romdata]
; add ebx,100000h
mov bx,[SPCDecmPtr]
add ebx,[romdata]
add ebx,510000h
mov al,[ebx]
pop ebx
; xor al,al
inc dword[SPCCompPtr]
push eax
inc word[SPCDecmPtr]
mov ax,[SPCDecmPtr]
mov [CurDecompPtr],ax
sub ax,[PrevDecompPtr]
mov [CurDecompSize],ax
pop eax
; cmp word[SPCCompCounter],0FFFFh
; jne .exit
; mov byte[SPCDecompFin],80h
;.exit
ret
.manual
xor al,al
push ebx
xor ebx,ebx
mov bx,[SPCDecmPtr]
add ebx,[romdata]
add ebx,510000h
mov al,[ebx]
pop ebx
dec word[SPCCompCounter]
inc dword[SPCCompPtr]
inc word[SPCDecmPtr]
inc word[CurDecompSize]
; cmp word[SPCCompCounter],0FFFFh
; jne .exit2
; mov byte[SPCDecompFin],80h
;.exit2
ret
SPC4801:
mov al,[SPCCompPtr]
ret
SPC4802:
mov al,[SPCCompPtr+1]
ret
SPC4803:
mov al,[SPCCompPtr+2]
ret
SPC4804:
mov al,[SPCCompPtr+3]
ret
SPC4805:
mov al,[SPCDecmPtr]
ret
SPC4806:
mov al,[SPCDecmPtr+1]
ret
SPC4807:
xor al,al
ret
SPC4808:
xor al,al
ret
SPC4809:
mov al,[SPCCompCounter]
ret
SPC480A:
mov al,[SPCCompCounter+1]
ret
SPC480B:
mov al,[SPCCompCommand]
mov dword[SPCDecmPtr],0
ret
SPC480C: ; decompression finished status
mov al,[SPCDecompFin]
mov byte[SPCDecompFin],0
ret
SECTION .bss
NEWSYM CurPtrVal, resd 1
NEWSYM CurCompCounter2, resd 1
NEWSYM CurPtrLen, resd 1
NEWSYM CurValUsed, resb 1
NEWSYM PrevDecompPtr, resw 1
NEWSYM CurDecompPtr, resw 1
NEWSYM CurDecompSize, resw 1
NEWSYM DecompArray, resb 65536
NEWSYM DecompAPtr, resd 1
lastentry resd 1
SECTION .text
NEWSYM UpdateRTC
test byte[SPC7110RTC+0Dh],02h
jnz .notimer
.notimer
ret
SPC4801w:
mov [SPCCompPtr],al
ret
SPC4802w:
mov [SPCCompPtr+1],al
ret
SPC4803w:
mov [SPCCompPtr+2],al
ret
SPC4804w:
mov [SPCCompPtr+3],al
ret
SPC4805w:
mov [SPCDecmPtr],al
ret
SPC4806w:
mov [SPCDecmPtr+1],al
cmp dword[SPCCompPtr],0124AD48h
jne .nodata
; mov byte[debstop3],1
.nodata
pushad
cmp byte[CurValUsed],0
je near .novalue
xor ebx,ebx
mov edx,DecompArray
mov eax,[CurPtrVal]
; and eax,0FFFFFFh
cmp dword[DecompAPtr],0
je .noptr
.loop
mov ecx,[edx]
; and ecx,0FFFFFFh
cmp ecx,eax
je .match
add edx,8
inc ebx
cmp ebx,[DecompAPtr]
jne .loop
.noptr
cmp dword[DecompAPtr],8192
je .novalue
mov [edx],eax
xor eax,eax
mov ax,[CurDecompSize]
mov [edx+4],ax
mov ax,[CurPtrLen]
mov [edx+6],ax
mov al,[CurPtrLen+2]
mov [edx+3],al
inc dword[DecompAPtr]
jmp .novalue
.match
add edx,4
xor ebx,ebx
mov bx,[CurDecompSize]
cmp [edx],bx
jae .novalue
mov [edx],bx
.novalue
mov [lastentry],edx
mov byte[CurValUsed],1
mov eax,[SPCCompPtr]
and eax,0FFFFFFh
mov [CurPtrVal],eax
popad
mov word[CurDecompSize],0
push eax
mov al,[SPCCompPtr+3]
mov [CurPtrLen+2],al
mov ax,[SPCDecmPtr] ;CurCompCounter2]
mov [CurPtrLen],ax
mov eax,[SPCCompPtr]
mov [CurPtrVal],eax
mov ax,[SPCDecmPtr]
mov [PrevDecompPtr],ax
mov [CurDecompPtr],ax
mov word[CurDecompSize],0
pop eax
mov byte[SPCDecompFin],0h
; Start Decompression
pushad
mov eax,[SPCCompPtr]
cmp [SPCPrevCompPtr],eax
je near .previousequal
mov [SPCPrevCompPtr],eax
mov ecx,[SPC7110Entries]
mov ebx,[SPCCompPtr]
and ebx,0FFFFFFh
mov eax,[spc7110romptr]
or ecx,ecx
jz .noentries
.loopc
mov edx,[eax]
cmp dl,[SPCCompPtr+3]
jne .notfound
shr edx,8
cmp ebx,edx
je .found
.notfound
add eax,12
dec ecx
jnz .loopc
jmp .noentries
.found
xor word[CurPtrLen],0FFFFh
mov ecx,[eax+8]
mov ebx,[eax+4]
xor edx,edx
mov dx,[SPCDecmPtr]
add edx,[romdata]
add edx,510000h
push eax
.loopb
mov al,[ebx]
mov [edx],al
inc ebx
inc edx
dec ecx
jnz .loopb
pop eax
mov ebx,[eax+4]
mov edx,[lastentry]
; mov [edx+4],ebx
mov ebx,[eax]
; mov [edx],ebx
jmp .foundentry
.noentries
mov ecx,[SPC7110IndexSize]
; Address/index, pointer, length, SPC7110nfname
mov edx,[romdata]
add edx,580000h
.sploop
mov eax,[SPCCompPtr]
shl eax,8
mov al,[SPCCompPtr+3]
cmp [edx],eax
je .foundsp
add edx,12
sub ecx,12
jc .overflow
jnz .sploop
.overflow
jmp .notfoundentry
.foundsp
mov eax,[edx+4]
mov [SPC7110TempPosition],eax
mov eax,[edx+8]
mov [SPC7110TempLength],eax
mov edx,[SPC7110filep]
mov eax,[SPCCompPtr]
and eax,0FFFFFFh
mov ecx,6
.sploop2
mov ebx,eax
shr ebx,20
and ebx,0Fh
cmp bl,9
jbe .below9
add bl,55-48
.below9
add bl,48
mov [edx],bl
inc edx
shl eax,4
dec ecx
jnz .sploop2
mov edx,SPC7110nfname
call Open_File
jnc .nocaseerror
pushad
call SPC7_Convert_Upper
popad
call Open_File
jnc .nocaseerror
pushad
call SPC7_Convert_Lower
popad
call Open_File
jc .error
.nocaseerror
mov bx,ax
mov dx,[SPC7110TempPosition]
mov cx,[SPC7110TempPosition+2]
call File_Seek
xor edx,edx
mov dx,[SPCDecmPtr]
add edx,[romdata]
add edx,510000h
mov ecx,[SPC7110TempLength]
call Read_File
call Close_File
jmp .foundentry
.error
; mov dword[Msgptr],SPC7110nfname
; mov dword[MessageOn],60*6
.notfoundentry
.foundentry
.previousequal
popad
.fin
.blah
; Finished
; mov word[SPCCompCounter],0FFFFh
mov byte[SPCDecompFin],80h
ret
SPC4807w:
ret
SPC4808w:
ret
SPC4809w:
mov [SPCCompCounter],al
mov [CurCompCounter2],al
ret
SPC480Aw:
mov [SPCCompCounter+1],al
mov [CurCompCounter2+1],al
ret
SPC480Bw:
mov [SPCCompCommand],al
ret
; 01,
;$4810 DATA ROM CONTINUOUS READ PORT: returns a byte from data rom at data
; rom pointer location, defval:00
;$4811 DATA ROM POINTER: ($0000FF) r/w low offset, defval:00
;$4812 DATA ROM POINTER: ($00FF00) r/w high offset, defval:00
;$4813 DATA ROM POINTER: ($FF0000) r/w bank offset, defval:00
; bank offset is zero based from start of data rom: banks $00-$3f
; data rom -> $10-$4f full rom
;$4814 DATA ROM POINTER ADJUST: ($00FF) low byte, defval:00
;$4815 DATA ROM POINTER ADJUST: ($FF00) high byte, defval:00
;$4816 DATA ROM POINTER INCREMENT: ($00FF) low byte, defval:00
;$4817 DATA ROM POINTER INCREMENT: ($FF00) high byte, defval:00
;$4818 DATA ROM COMMAND MODE: bit field control of data rom pointer (see
; data rom command mode byte), defval:00
; write: set command mode,
; read: performs action instead of returning value, unknown purpose,
; command mode is loaded to $4818 but only set after writing to both
; $4814 and $4815 in any order
;$481A DATA ROM READ AFTER ADJUST PORT: returns a byte from data rom at
; data rom pointer location + adjust value ($4814/5), defval:00
SPC4810:
cmp dword[SPCCheckFix],0
jne .okay
xor al,al
ret
.okay
push ebx
push ecx
mov ebx,[SPCROMPtr]
add ebx,[romdata]
add ebx,100000h
mov al,[ebx]
cmp byte[SPCROMCom+1],0
jne .noincr1
mov ebx,[SPCROMtoI]
inc dword[ebx]
.noincr1
cmp byte[SPCROMCom+1],1 ; add 4816 after 4810 read
jne .noincr1b
mov ebx,[SPCROMtoI]
mov ecx,[SPCROMInc]
add dword[ebx],ecx
.noincr1b
pop ecx
pop ebx
ret
SPC4811:
mov al,[SPCROMPtr]
ret
SPC4812:
mov al,[SPCROMPtr+1]
ret
SPC4813:
mov al,[SPCROMPtr+2]
ret
SPC4814:
mov al,[SPCROMAdj]
ret
SPC4815:
mov al,[SPCROMAdj+1]
ret
SPC4816:
mov al,[SPCROMInc]
ret
SPC4817:
mov al,[SPCROMInc+1]
ret
SPC4818:
mov al,[SPCROMCom]
ret
SPC481A:
cmp dword[SPCCheckFix],0
jne .okay
xor al,al
ret
.okay
push ebx
push ecx
xor ebx,ebx
xor ecx,ecx
mov bx,[SPCROMAdj]
add ebx,[SPCROMPtr]
add ebx,[romdata]
add ebx,100000h
mov al,[ebx]
cmp byte[SPCROMCom+1],4 ; 16bit 4814
jne .notincr
mov ecx,[SPCROMtoI]
mov ebx,[SPCROMAdj]
add [ecx],ebx
.notincr
pop ecx
pop ebx
ret
SPC4811w:
mov [SPCROMPtr],al
mov byte[SPCCheckFix],1
ret
SPC4812w:
mov [SPCROMPtr+1],al
ret
SPC4813w:
mov [SPCROMPtr+2],al
ret
SPC4814w:
mov [SPCROMAdj],al
cmp byte[SPCROMCom+1],2 ; 8 bit 4814
jne .notincr
mov ebx,[SPCROMtoI]
xor ecx,ecx
mov cl,[SPCROMAdj]
test byte[SPCROMCom],08h
jz .noneg
movsx ecx,byte[SPCROMAdj]
.noneg
add dword[ebx],ecx
.notincr
ret
SPC4815w:
mov [SPCROMAdj+1],al
mov word[SPCROMAdj+2],0
test byte[SPCROMCom],08h
jz .noneg
test byte[SPCROMAdj+1],80h
jz .noneg
mov word[SPCROMAdj+2],0FFFFh
.noneg
cmp byte[SPCROMCom+1],3 ; 16bit 4814
jne .notincr
push ebx
push ecx
mov ecx,[SPCROMtoI]
mov ebx,[SPCROMAdj]
add [ecx],ebx
pop ecx
pop ebx
.notincr
ret
SPC4816w:
mov [SPCROMInc],al
ret
SPC4817w:
mov [SPCROMInc+1],al
mov word[SPCROMInc+2],0
test byte[SPCROMCom],04h
jz .noneg
test byte[SPCROMInc+1],40h
jz .noneg
mov word[SPCROMInc+2],0FFFFh
.noneg
ret
SPC4818w:
mov [SPCROMCom],al
mov word[SPCROMAdj+2],0
test byte[SPCROMCom],08h
jz .noneg
test byte[SPCROMAdj+1],80h
jz .noneg
mov word[SPCROMAdj+2],0FFFFh
.noneg
mov word[SPCROMInc+2],0
test byte[SPCROMCom],04h
jz .noneg2
test byte[SPCROMInc+1],40h
jz .noneg2
mov word[SPCROMInc+2],0FFFFh
.noneg2
mov dword[SPCROMtoI],SPCROMPtr
test byte[SPCROMCom],10h
jz .nouseadjust
mov dword[SPCROMtoI],SPCROMAdj
.nouseadjust
test al,02h
jz .no4814
test al,40h
jz .no16b
test al,20h
jz .not481A
mov byte[SPCROMCom+1],4 ; 16bit 4814 after 481A
jmp .fin
.not481A
mov byte[SPCROMCom+1],3 ; 16bit 4814
jmp .fin
.no16b
test al,20h
jz .nooffsetadd
mov byte[SPCROMCom+1],2 ; 8 bit 4814
jmp .fin
.nooffsetadd
mov byte[SPCROMCom+1],0FFh
jmp .fin
.no4814
test al,01h
jz .incrval0
mov byte[SPCROMCom+1],1 ; add 4816 after 4810 read
jmp .fin
.incrval0
mov byte[SPCROMCom+1],0 ; add 1 after 4810 read
.fin
ret
;Data Rom Command Mode Byte:
;X6543210
;||||||||
;|||||| \__ : 00 - use 1 as the offset increment value, add immediately after reading $4810
;|||||| : 01 - use $4816 as offset increment, add immediately after reading $4810
;|||||| : 10 - use $4814 as offset increment, see below for when to add
;|||||| : 11 - unused
;||||||____ : 0 - unsigned calculation for $4816
;||||| 1 - signed calculation for $4816
;|||||_____ : 0 - unsigned calculation for $4814
;|||| 1 - signed calculation for $4814
;||||______ : 0 - offset increment gets added to $4811/2/3
;||| 1 - offset increment gets added to $4814/5
;| \_______ : 00 - disable offset addition
;| : 01 - 8 bit offset addition using $4814, immediately after writing to $4814/5
;| : 10 - 16 bit offset addition using $4814/5, immediately after writing to $4814/5
;| : 11 - 16 bit offset addition using $4814/5, only after reading $481A
;|_________ : unused
SPC4820:
mov al,[SPCMultA]
; mov byte[debstop3],1
ret
SPC4821:
mov al,[SPCMultA+1]
ret
SPC4822:
mov al,[SPCMultA+2]
ret
SPC4823:
mov al,[SPCMultA+3]
ret
SPC4824:
mov al,[SPCMultB]
ret
SPC4825:
mov al,[SPCMultB+1]
ret
SPC4826:
mov al,[SPCDivEnd]
ret
SPC4827:
mov al,[SPCDivEnd+1]
ret
SPC4820w:
mov [SPCMultA],al
ret
SPC4821w:
mov [SPCMultA+1],al
ret
SPC4822w:
mov [SPCMultA+2],al
ret
SPC4823w:
mov [SPCMultA+3],al
ret
SPC4824w:
mov [SPCMultB],al
ret
SPC4825w:
mov [SPCMultB+1],al
; Calculate SPCMultA*SPCMultB -> SPCMulRes
test byte[SPCSignedVal],1
jnz .signed
push edx
push eax
push ebx
xor eax,eax
xor ebx,ebx
mov ax,[SPCMultA]
mov bx,[SPCMultB]
mul ebx
mov [SPCMulRes],eax
pop ebx
pop eax
pop edx
ret
.signed
push edx
push eax
push ebx
movsx eax,word[SPCMultA]
movsx ebx,word[SPCMultB]
imul ebx
mov [SPCMulRes],eax
pop ebx
pop eax
pop edx
ret
SPC4826w:
mov [SPCDivEnd],al
ret
SPC4827w:
mov [SPCDivEnd+1],al
; Calculte SPCMultA/SPCDivEnd -> SPCMulRes, rem SPCDivRes
cmp word[SPCDivEnd],0
je near .nodivide
test byte[SPCSignedVal],1
jnz .signed
push edx
push eax
push ebx
xor edx,edx
xor ebx,ebx
mov eax,[SPCMultA]
mov bx,[SPCDivEnd]
div ebx
mov [SPCMulRes],eax
mov [SPCDivRes],dx
pop ebx
pop eax
pop edx
ret
.signed
push edx
push eax
push ebx
xor edx,edx
mov eax,[SPCMultA]
test eax,80000000h
jz .nd
mov edx,0FFFFFFFFh
.nd
movsx ebx,word[SPCDivEnd]
idiv ebx
mov [SPCMulRes],eax
mov [SPCDivRes],dx
pop ebx
pop eax
pop edx
ret
.nodivide
mov dword[SPCMulRes],0FFFFFFFFh
mov dword[SPCDivRes],0FFFFh
ret
SPC4828:
mov al,[SPCMulRes]
ret
SPC4829:
mov al,[SPCMulRes+1]
ret
SPC482A:
mov al,[SPCMulRes+2]
ret
SPC482B:
mov al,[SPCMulRes+3]
ret
SPC482C:
mov al,[SPCDivRes]
ret
SPC482D:
mov al,[SPCDivRes+1]
ret
SPC482E:
xor al,al
ret
SPC482Ew:
mov [SPCSignedVal],al
mov dword[SPCMultA],0
mov dword[SPCMultB],0
mov dword[SPCDivEnd],0
mov dword[SPCMulRes],0
mov dword[SPCDivRes],0
ret
SPC482F:
xor al,al
ret
SPC4831w:
BankSwitchSPC7110 0,0D0h
ret
SPC4832w:
BankSwitchSPC7110 1,0E0h
ret
SPC4833w:
; mov byte[debstop3],1
BankSwitchSPC7110 2,0F0h
ret
SPC4831:
mov al,[SPC7110BankA]
ret
SPC4832:
mov al,[SPC7110BankA+1]
ret
SPC4833:
mov al,[SPC7110BankA+2]
ret
SPC4834:
xor al,al
ret
;$4840 RTC CHIP ENABLE/DISABLE: bit 0: on = enable, off = disable, defval:00
;$4841 RTC INDEX/DATA PORT:
; first write after rtc enable: rtc command mode byte (see rtc command modes)
; subsequent writes: index of rtc register to read/write (00-0f)
; read: returns value of indexed rtc register
; auto-increment of register index occurs after each subsequent read/write
;$4842 RTC READY STATUS: bit 7: on = ready, off = still processing, tested before reading rtc data
; high bit cleared after successful read
SPC4840w:
test al,1
jz .notreset
mov [SPC7110RTCStat],al
mov byte[SPC7110RTCStat+1],0FEh
.notreset
ret
SPC4841w:
cmp byte[SPC7110RTCStat+1],0FEh
je .commandbyte
cmp byte[SPC7110RTCStat+1],0FFh
je .commandindex
push ebx
xor ebx,ebx
mov bl,[SPC7110RTCStat+1]
mov [SPC7110RTC+ebx],al
cmp ebx,0Fh
jne .notlast
test al,01h
jz .notlast
mov dword[SPC7110RTC],0
mov dword[SPC7110RTC+4],010000h
mov dword[SPC7110RTC+8],01h
mov byte[SPC7110RTC+12],0
.notlast
pop ebx
inc byte[SPC7110RTCStat+1]
and byte[SPC7110RTCStat+1],0Fh
ret
.commandbyte
inc byte[SPC7110RTCStat+1]
mov [SPC7110RTCStat+2],al
ret
.commandindex
push eax
and al,0Fh
mov [SPC7110RTCStat+1],al
pop eax
ret
SPC4842w:
ret
SPC4840:
mov al,[SPC7110RTCStat]
ret
SPC4841:
cmp byte[SPC7110RTCStat+1],0FEh
je near .commandbyte
cmp byte[SPC7110RTCStat+1],0FFh
je near .commandbyte
push ebx
xor ebx,ebx
mov bl,[SPC7110RTCStat+1]
or ebx,ebx
jnz near .dontupdate
test byte[SPC7110RTC+0Fh],03h
jnz near .dontupdate
test byte[SPC7110RTC+0Dh],01h
jnz near .dontupdate
;00 - seconds 1's digit 00
;01 - seconds 10's digit 00
;02 - minutes 1's digit 00
;03 - minutes 10's digit 00
;04 - hours 1's digit 00
;05 - hours 10's digit 00
;06 - day of month 1's digit 01
;07 - day of month 10's digit 00
;08 - month 1's digit 01
;09 - month 10's digit 00
;0a - year 1's digit 00
;0b - year 10's digit 00
;0c - day of week 00
cmp byte[debuggeron],1
je near .dontupdate
; fill time/date
push ebx
push eax
call Get_Time
mov bl,al
and bl,0Fh
mov [SPC7110RTC],bl ; seconds
shr eax,4
mov bl,al
and bl,0Fh
mov [SPC7110RTC+1],bl
shr eax,4
mov bl,al
and bl,0Fh
mov [SPC7110RTC+2],bl ; minutes
shr eax,4
mov bl,al
and bl,0Fh
mov [SPC7110RTC+3],bl
test byte[SPC7110RTC+0Fh],4
; jz .not24hrs
; jmp .not24hrs
shr eax,4
mov bl,al
and bl,0Fh
mov [SPC7110RTC+4],bl ; hours
shr eax,4
mov bl,al
and bl,0Fh
mov [SPC7110RTC+5],bl
jmp .24hrs
.not24hrs
shr eax,4
xor ebx,ebx
mov bl,al
mov al,[SPCTimerVal+ebx]
mov bl,al
and bl,0Fh
mov [SPC7110RTC+4],bl ; hours
shr eax,4
mov bl,al
and bl,0Fh
mov [SPC7110RTC+5],bl
.24hrs
call Get_TimeDate
mov bl,al
and bl,0Fh
mov [SPC7110RTC+6],bl ; day
shr eax,4
mov bl,al
and bl,0Fh
mov [SPC7110RTC+7],bl
shr eax,4
mov bl,al
and bl,0Fh
xor bh,bh
cmp bl,9
jbe .less
sub bl,10
mov bh,1
.less
mov [SPC7110RTC+8],bl ; month
mov [SPC7110RTC+9],bh ; month
shr eax,8
mov bl,al
and bl,0Fh
mov [SPC7110RTC+10],bl ; year
shr eax,4
mov bl,al
and bl,01Fh
xor bh,bh
.notokay
cmp bl,9
jbe .okay
inc bh
sub bl,10
jmp .notokay
.okay
mov [SPC7110RTC+11],bl
shr eax,8
and al,0Fh
mov [SPC7110RTC+12],al ; day of week
.done
pop eax
pop ebx
.dontupdate
; test byte[SPC7110RTC+0Fh],1
; jz .realtime
; cmp ebx,0Dh
; jae .realtime
; mov al,[SPC7110RTCB+ebx]
; jmp .next
;.realtime
mov al,[SPC7110RTC+ebx]
;.next
pop ebx
inc byte[SPC7110RTCStat+1]
and byte[SPC7110RTCStat+1],0Fh
ret
.commandbyte
inc byte[SPC7110RTCStat+1]
mov al,[SPC7110RTCStat+2]
ret
SECTION .data
SPCTimerVal:
db 12h,01h,02h,03h,04h,05h,06h,07h,08h,09h,0,0,0,0,0,0
db 10h,11h,32h,21h,22h,23h,24h,25h,26h,27h,0,0,0,0,0,0
db 28h,29h
SECTION .text
SPC4842:
mov al,80h
ret
;$4820 16 BIT MULTIPLICAND: ($00FF) low byte, defval:00
; 32 BIT DIVI: ($000000FF) low byte of low word, defval:00
;$4821 16 BIT MULTIPLICAND: ($FF00) high byte, defval:00
; 32 BIT DIVI: ($0000FF00) high byte of low word, defval:00
;$4822 32 BIT DIVI: ($00FF0000) low byte of high word, defval:00
;$4823 32 BIT DIVI: ($FF000000) high byte of high word, defval:00
;$4824 16 BIT MULTIPLIER: ($00FF) low byte, defval:00
;$4825 16 BIT MULTIPLIER: ($FF00) high byte, defval:00
;$4826 16 BIT DIVISOR: ($00FF), defval:00
;$4827 16 BIT DIVISOR: ($FF00), defval:00
;$4828 32 BIT PRODUCT: ($000000FF) low byte of low word, defval:00
; 32 BIT QUOTIENT:($000000FF) low byte of low word, defval:00
;$4829 32 BIT PRODUCT: ($0000FF00) high byte of low word, defval:00
; 32 BIT QUOTIENT:($0000FF00) high byte of low word, defval:00
;$482A 32 BIT PRODUCT: ($00FF0000) low byte of high word, defval:00
; 32 BIT QUOTIENT:($00FF0000) low byte of high word, defval:00
;$482B 32 BIT PRODUCT: ($FF000000) high byte of high word, defval:00
; 32 BIT QUOTIENT:($FF000000) high byte of high word, defval:00
;$482C 16 BIT REMAINDER: ($00FF) low byte, defval:00
;$482D 16 BIT REMAINDER: ($FF00) high byte, defval:00
;$482E MUL/DIV RESET, write = reset $4820 to $482D, defval:00
;$482F MUL/DIV FINISHED STATUS: bit 7: on = processing, off = finished,
; high bit is set after a write to multiplier or divisor regs $4825/$4827, defval:00
; SA-1 Start
; ----------
SECTION .data
; IRQ Stuff
NEWSYM SA1Mode, dd 0 ; 0 = SNES CPU, 1 = SA1 CPU
NEWSYM SA1Control, dd 0 ; don't execute if b5 or 6 are set
NEWSYM SA1BankPtr, dd 0
NEWSYM SA1ResetV, dd 0
NEWSYM SA1NMIV, dd 0
NEWSYM SA1IRQV, dd 0
NEWSYM SA1RV, dd 0
NEWSYM CurBWPtr, dd 0
NEWSYM SA1TempVar, dd 0
NEWSYM SA1IRQEn, dd 0
NEWSYM SA1Message, dd 0
NEWSYM SA1IRQExec, dd 0
NEWSYM SA1IRQEnable, dd 0
NEWSYM SA1DoIRQ, dd 0
; Arithmetic Stuff
NEWSYM SA1ARC, dd 0
NEWSYM SA1AR1, dd 0
NEWSYM SA1AR2, dd 0
NEWSYM SA1ARR1, dd 0
NEWSYM SA1ARR2,dd 0
NEWSYM SA1Stat, dd 0
NEWSYM SNSNMIV, dd 0
NEWSYM SNSIRQV, dd 0
NEWSYM SA1DMACount, dd 0
NEWSYM SA1DMAInfo, dd 0
NEWSYM SA1DMAChar, dd 0
NEWSYM SA1DMASource, dd 0
NEWSYM SA1DMADest, dd 0
NEWSYM SA1IRQTemp, dd 0
NEWSYM SA1BankSw, dd 1
NEWSYM SA1BankVal, db 0,1,2,3
NEWSYM BWShift, dd 0
NEWSYM BWAndAddr, dd 0
NEWSYM BWAnd, dd 0
NEWSYM BWRAnd, dd 0
SA1Reserved times 456 db 0
; SA1 Swap Stuff
NEWSYM SA1xa, dd 0
NEWSYM SA1xx, dd 0
NEWSYM SA1xy, dd 0
NEWSYM SA1xd, dd 0
NEWSYM SA1xdb, dd 0
NEWSYM SA1xpb, dd 0
NEWSYM SA1xs, dd 0
NEWSYM SA1RegP, dd 0
NEWSYM SA1RegE, dd 0
NEWSYM SA1RegPCS,dd 0
NEWSYM SA1BWPtr,dd 0
NEWSYM SA1Ptr, dd 0 ; Current PC, SA-1
NEWSYM SA1Overflow, dd 0
NEWSYM VarLenAddr, dd 0
NEWSYM VarLenAddrB, dd 0
NEWSYM VarLenBarrel, dd 0
NEWSYM SA1TimerVal, dd 0
NEWSYM SA1TimerSet, dd 0
NEWSYM SA1TimerCount, dd 0
NEWSYM SA1IRQData, dd 0
; SNES Swap Stuff
NEWSYM SNSRegP, dd 0
NEWSYM SNSRegE, dd 0
NEWSYM SNSRegPCS,dd 0
NEWSYM SNSBWPtr,dd 0
NEWSYM SNSPtr, dd 0 ; Current PC, SNES
NEWSYM IRAM, times 2049 db 0 ;2 kbytes of iram
num2writesa1reg equ $-SA1Mode
NEWSYM PHnum2writesa1reg, dd num2writesa1reg
NEWSYM SA1RAMArea, dd 0
NEWSYM SA1Temp, dd 0
NEWSYM Sdd1Mode, dd 0
NEWSYM Sdd1Bank, dd 0
NEWSYM Sdd1Addr, dd 0
NEWSYM Sdd1NewAddr, dd 0
SECTION .text
%macro SA1QuickF 2
NEWSYM %1
mov [%2],al
ret
%endmacro
NEWSYM SA1Reset
mov byte[SA1IRQData+1],0
mov byte[SA1Mode],0
mov byte[SA1Status],0
mov byte[SA1Control],20h
mov dword[SA1DoIRQ],0
mov ax,[irqv2]
mov [irqv],ax
mov ax,[nmiv2]
mov [nmiv],ax
mov eax,[romdata]
sub eax,8000h
mov [SA1RegPCS],eax
mov eax,[romdata]
add eax,4096*1024
mov [SA1RAMArea],eax
mov eax,[romdata]
add eax,4096*1024-6000h
mov [CurBWPtr],eax
mov [SA1BWPtr],eax
mov [SNSBWPtr],eax
mov dword[SA1xa],0
mov dword[SA1xx],0
mov dword[SA1xy],0
mov dword[SA1xd],0
mov dword[SA1xdb],0
mov dword[SA1xpb],0
mov dword[SA1xs],1FFh
mov dword[SA1RegP],0
mov dword[SA1RegE],0
mov dword[SA1IRQExec],0
mov dword[SA1IRQEnable],0
mov dword[SA1Message],0
mov word[SA1Overflow],0
ret
%macro BankSwitch 4
push ecx
push edx
push eax
mov [SA1BankVal+%1],al
mov ebx,snesmmap+%2*4
test al,80h
jz .noupper
cmp byte[NumofBanks],64
jne .BSBigBank
and eax,1
.BSBigBank
and eax,07h
shl eax,20
push eax
jmp .yesupper
.noupper
cmp byte[NumofBanks],64
jne .BSBigBank2
and eax,1
.BSBigBank2
and eax,07h
shl eax,20
push eax
mov eax,%4
.yesupper
mov ecx,20h
add eax,[romdata]
sub eax,8000h
.mmaploop
mov [ebx],eax
add eax,8000h
add ebx,4
dec ecx
jnz .mmaploop
pop eax
add eax,[romdata]
mov ecx,10h
mov ebx,snesmap2+%3*4
mov edx,snesmmap+%3*4
.mmaploop2
mov [ebx],eax
mov [edx],eax
add eax,10000h
add ebx,4
add edx,4
dec ecx
jnz .mmaploop2
pop eax
pop edx
pop ecx
ret
%endmacro
NEWSYM sa12220w
BankSwitch 0,0,0C0h,0
NEWSYM sa12221w
BankSwitch 1,20h,0D0h,100000h
NEWSYM sa12222w
BankSwitch 2,80h,0E0h,200000h
NEWSYM sa12223w
BankSwitch 3,0A0h,0F0h,300000h
%macro BankSwitchSDD1 2
push ecx
push edx
push eax
mov [SDD1BankA+%1],al
and eax,07h
shl eax,20
add eax,[romdata]
mov ecx,10h
mov ebx,snesmap2+%2*4
mov edx,snesmmap+%2*4
.mmaploop2
mov [ebx],eax
mov [edx],eax
add eax,10000h
add ebx,4
add edx,4
dec ecx
jnz .mmaploop2
pop eax
pop edx
pop ecx
ret
%endmacro
sdd14804:
mov al,[SDD1BankA]
ret
sdd14805:
mov al,[SDD1BankA+1]
ret
sdd14806:
mov al,[SDD1BankA+2]
ret
sdd14807:
mov al,[SDD1BankA+3]
ret
NEWSYM sdd14804w
BankSwitchSDD1 0,0C0h
NEWSYM sdd14805w
BankSwitchSDD1 1,0D0h
NEWSYM sdd14806w
BankSwitchSDD1 2,0E0h
NEWSYM sdd14807w
BankSwitchSDD1 3,0F0h
NEWSYM sa12200w
mov bl,al
and bl,0Fh
mov [SA1Message],bl
test al,80h
jz .noirq
or byte[SA1DoIRQ],1
.noirq
test al,10h
jz .nonmi
or byte[SA1DoIRQ],2
.nonmi
test byte[SA1Control],20h
jz .noreset
test al,20h
jnz .noreset
mov [SA1Control],al
mov ebx,[romdata]
mov [SA1BankPtr],ebx
xor ebx,ebx
mov bx,[SA1ResetV]
add ebx,[romdata]
sub ebx,8000h
mov [SA1Ptr],ebx
mov byte[SA1xpb],0
mov word[SA1xs],1FFh
mov ebx,[romdata]
sub ebx,8000h
mov [SA1RegPCS],ebx
xor ebx,ebx
ret
.noreset
mov [SA1Control],al
ret
NEWSYM sa12201w ; IRQ Enable
mov [SA1IRQEnable],al
ret
NEWSYM sa12202w ; IRQ Clear
test al,80h
jz .noirqclear
and byte[SA1IRQExec],0FEh
and byte[SA1DoIRQ],0FBh
.noirqclear
test al,20h
jz .nocdmairqclear
and byte[SA1IRQExec],0FDh
and byte[SA1DoIRQ],0F7h
.nocdmairqclear
ret
SA1QuickF sa12203w, SA1ResetV
SA1QuickF sa12204w, SA1ResetV+1
SA1QuickF sa12205w, SA1NMIV
SA1QuickF sa12206w, SA1NMIV+1
SA1QuickF sa12207w, SA1IRQV
SA1QuickF sa12208w, SA1IRQV+1
NEWSYM sa12209w ; IRQ Stuff
mov [SA1IRQData+1],al
test al,80h
jz .noirq
; execute IRQ on the SNES
or byte[SA1DoIRQ],4
.noirq
mov bl,al
and bl,0Fh
mov [SA1Message+1],bl
mov bx,[irqv2]
test al,40h
jz .noirqchange
mov bx,[SNSIRQV]
.noirqchange
mov [irqv],bx
mov bx,[nmiv2]
test al,10h
jz .nonmichange
mov bx,[SNSNMIV]
.nonmichange
mov [nmiv],bx
ret
SA1QuickF sa1220Aw, SA1IRQEn
NEWSYM sa1220Bw ; SA-1 IRQ Clear
test al,80h
jz .noirqclear
mov byte[SA1IRQExec+1],0
and byte[SA1DoIRQ],0FEh
.noirqclear
test al,20h
jz .nocdmairqclear
.nocdmairqclear
test al,10h
jz .nonmiclear
mov byte[SA1IRQExec+2],0
and byte[SA1DoIRQ],0FDh
.nonmiclear
ret
SA1QuickF sa1220Cw, SNSNMIV
SA1QuickF sa1220Dw, SNSNMIV+1
SA1QuickF sa1220Ew, SNSIRQV
SA1QuickF sa1220Fw, SNSIRQV+1
NEWSYM sa12224w ; BWRAM
mov bl,al
and ebx,1Fh
shl ebx,13
add ebx,[romdata]
add ebx,1024*4096-6000h
mov [SNSBWPtr],ebx
cmp byte[SA1Status],0
jne .nosnes
mov [CurBWPtr],ebx
.nosnes
ret
NEWSYM sa12225w ; BWRAM
mov [BWUsed2],al
test al,80h
jnz .upper
mov bl,al
and ebx,1Fh
shl ebx,13
add ebx,[romdata]
add ebx,1024*4096-6000h
mov [SA1BWPtr],ebx
cmp byte[SA1Status],0
je .nosa1b
mov [CurBWPtr],ebx
.nosa1b
mov byte[BWShift],0
mov byte[BWAndAddr],0
mov byte[BWAnd],0FFh
mov byte[BWRAnd],0h
ret
.upper
mov bl,al
and ebx,7Fh
test byte[SA1Overflow+1],80h
jz .16col
shl ebx,11
mov byte[BWShift],2
mov byte[BWAndAddr],03h
mov byte[BWAnd],03h
mov byte[BWRAnd],0FCh
jmp .4col
.16col
mov byte[BWShift],1
mov byte[BWAndAddr],01h
mov byte[BWAnd],0Fh
mov byte[BWRAnd],0F0h
and ebx,3Fh
shl ebx,12
.4col
add ebx,[romdata]
add ebx,1024*4096
mov [SA1BWPtr],ebx
cmp byte[SA1Status],0
je .nosa1
mov [CurBWPtr],ebx
.nosa1
; mov byte[debstop3],1
ret
NEWSYM sa12250w
mov [SA1ARC],al
mov byte[SA1ARC+1],1
test al,2
jz .notcumul
mov word[SA1ARR1],0
mov word[SA1ARR1+2],0
mov word[SA1ARR1+4],0
.notcumul
ret
NEWSYM sa12251w
mov [SA1AR1],al
mov byte[SA1ARC+1],1
ret
NEWSYM sa12252w
mov [SA1AR1+1],al
mov byte[SA1ARC+1],1
ret
NEWSYM sa12253w
mov [SA1AR2],al
mov byte[SA1ARC+1],1
ret
NEWSYM sa12254w
mov [SA1AR2+1],al
mov byte[SA1ARC+1],1
test byte[SA1ARC],2
jnz .cumul
call UpdateArithStuff
ret
; set overflow bit if exceeds 40bits
.cumul
pushad
xor edx,edx
mov ax,[SA1AR1]
mov bx,[SA1AR2]
imul bx
shl edx,16
mov dx,ax
mov byte[SA1Overflow],0
add [SA1ARR1],edx
adc byte[SA1ARR2],0
jnc .notoverflow
mov byte[SA1Overflow],80h
.notoverflow
popad
ret
UpdateArithStuff:
cmp byte[SA1ARC+1],1
jne .noarith
pushad
mov byte[SA1ARC+1],0
test byte[SA1ARC],3
jz .multiply
test byte[SA1ARC],2
jnz near .cumulativesum
test byte[SA1ARC],1
jnz .division
.multiply
xor edx,edx
mov ax,[SA1AR1]
mov bx,[SA1AR2]
imul bx
mov [SA1ARR1],ax
mov [SA1ARR1+2],dx
popad
.noarith
ret
.division
movsx eax,word[SA1AR1]
xor edx,edx
test eax,80000000h
jz .notneg
mov edx,0FFFFFFFFh
.notneg
xor ebx,ebx
mov bx,[SA1AR2]
or ebx,ebx
jz .invalid
idiv ebx
mov [SA1ARR1],ax
mov [SA1ARR1+2],dx
; mov word[SA1AR1],0
; mov word[SA1AR2],0
popad
ret
.invalid
mov word[SA1ARR1],0
mov word[SA1ARR1+2],0
popad
ret
.cumulativesum
popad
ret
sa12300r:
mov al,[SA1Message+1]
test byte[SA1IRQExec],1
jz .notexecuted
or al,80h
.notexecuted
test byte[SA1IRQExec],2
jz .notexecutedi
or al,20h
.notexecutedi
mov bl,[SA1IRQData+1]
and bl,50h
or al,bl
ret
sa12301r:
mov al,[SA1Message]
test byte[SA1IRQExec+1],1
jz .notexecuted
or al,80h
.notexecuted
ret
sa12306r:
; call UpdateArithStuff
mov al,[SA1ARR1]
ret
sa12307r:
; call UpdateArithStuff
mov al,[SA1ARR1+1]
ret
sa12308r:
; call UpdateArithStuff
mov al,[SA1ARR1+2]
ret
sa12309r:
; call UpdateArithStuff
mov al,[SA1ARR1+3]
ret
sa1230Ar:
; call UpdateArithStuff
mov al,[SA1ARR2]
ret
sa1230Br:
mov al,[SA1Overflow]
ret
NEWSYM IRamRead
mov al,[IRAM+ecx-3000h]
ret
NEWSYM IRamWrite
mov [IRAM+ecx-3000h],al
ret
NEWSYM IRamWrite2
mov [IRAM+ecx-3000h],al
xor dh,dh
ret
NEWSYM sa1223Fw
mov [SA1Overflow+1],al
ret
; Variable Length Data
NEWSYM sa12258w
mov [VarLenBarrel+2],al
mov bl,al
and bl,0Fh
cmp bl,0
jne .not0
mov bl,16
.not0
mov [VarLenBarrel+3],bl
test al,80h
jz .notchange
mov [VarLenBarrel],bl
mov [VarLenBarrel+1],bl
.notchange
ret
NEWSYM sa12259w
mov [VarLenAddr],al
mov [VarLenAddrB],al
mov byte[VarLenBarrel],0
mov byte[VarLenBarrel+1],0
ret
NEWSYM sa1225Aw
mov [VarLenAddr+1],al
mov [VarLenAddrB+1],al
mov byte[VarLenBarrel],0
mov byte[VarLenBarrel+1],0
ret
NEWSYM sa1225Bw
mov [VarLenAddr+2],al
mov [VarLenAddrB+2],al
mov byte[VarLenBarrel],0
mov byte[VarLenBarrel+1],0
ret
; Variable Length Read
NEWSYM sa1230Cr
push ecx
xor ebx,ebx
xor ecx,ecx
mov bl,[VarLenAddr+2]
mov cx,[VarLenAddr]
test ecx,8000h
jz .loweraddr
add ecx,[snesmmap+ebx*4]
jmp .upperaddr
.loweraddr
add ecx,[snesmap2+ebx*4]
.upperaddr
mov ebx,[ecx]
mov cl,[VarLenBarrel+1]
shr ebx,cl
mov al,bl
pop ecx
test byte[VarLenBarrel+2],80h
jnz .autoinc
ret
.autoinc
mov bl,[VarLenBarrel+3]
add [VarLenBarrel],bl
mov bl,[VarLenBarrel]
cmp bl,16
jbe .notover
sub byte[VarLenBarrel],16
add dword[VarLenAddr],2
mov byte[VarLenAddr+3],0
.notover
ret
NEWSYM sa1230Dr
push ecx
xor ebx,ebx
xor ecx,ecx
mov bl,[VarLenAddrB+2]
mov cx,[VarLenAddrB]
test ecx,8000h
jz .loweraddr
add ecx,[snesmmap+ebx*4]
jmp .upperaddr
.loweraddr
add ecx,[snesmap2+ebx*4]
.upperaddr
mov ebx,[ecx]
mov cl,[VarLenBarrel+1]
shr ebx,cl
mov al,bh
pop ecx
test byte[VarLenBarrel+2],80h
jnz .autoinc
ret
.autoinc
mov bl,[VarLenBarrel+3]
add [VarLenBarrel+1],bl
mov bl,[VarLenBarrel+1]
cmp bl,16
jbe .notover
sub byte[VarLenBarrel+1],16
add dword[VarLenAddrB],2
mov byte[VarLenAddrB+3],0
.notover
ret
NEWSYM sa1230Er
mov al,10h
ret
; Approximate H loc
NEWSYM sa12302r
test byte[SA1TimerSet],80h
jnz .timeron
mov al,[CurrentExecSA1]
shl al,2
add al,dh
ret
.timeron
mov al,[SA1TimerCount]
ret
NEWSYM sa12303r
test byte[SA1TimerSet],80h
jnz .timeron
mov al,[CurrentExecSA1]
shr al,3
ret
.timeron
mov al,[SA1TimerCount+1]
and al,1
ret
NEWSYM sa12304r
test byte[SA1TimerSet],80h
jnz .timeron
mov al,[curypos]
ret
.timeron
mov bx,[SA1TimerCount+1]
shr bx,1
mov al,bl
ret
NEWSYM sa12305r
test byte[SA1TimerSet],80h
jnz .timeron
mov al,[curypos+1]
ret
.timeron
mov bx,[SA1TimerCount+2]
shr bx,1
mov al,bl
and al,1
ret
NEWSYM sa12210w ; Timer Settings
mov [SA1TimerSet],al
ret
NEWSYM sa12211w ; Timer Clear
mov dword[SA1TimerVal],0
ret
NEWSYM sa12212w
mov [SA1TimerCount],al
ret
NEWSYM sa12213w
mov [SA1TimerCount+1],al
ret
NEWSYM sa12214w
mov [SA1TimerCount+2],al
ret
NEWSYM sa12215w
mov [SA1TimerCount+3],al
ret
NEWSYM sa12230w
mov [SA1DMAInfo],al
ret
NEWSYM sa12231w
mov [SA1DMAChar],al
; if b7=1, then end of chdma process
ret
SA1QuickF sa12232w, SA1DMASource
SA1QuickF sa12233w, SA1DMASource+1
SA1QuickF sa12234w, SA1DMASource+2
SA1QuickF sa12235w, SA1DMADest
NEWSYM sa12236w
mov [SA1DMADest+1],al
test byte[SA1DMAInfo],10h
jnz near sa1chconv
test byte[SA1DMAInfo],4
jnz .noiram
jmp sa1dmairam
.noiram
ret
NEWSYM sa12237w
mov [SA1DMADest+2],al
test byte[SA1DMAInfo],10h
jnz .nobwram
test byte[SA1DMAInfo],4
jz .nobwram
jmp sa1dmabwram
.nobwram
ret
NEWSYM sa12238w
mov [SA1DMACount],al
ret
NEWSYM sa12239w
mov [SA1DMACount+1],al
ret
SECTION .bss
NEWSYM sa1dmaptr, resd 1
NEWSYM sa1dmaptrs, resd 1
SECTION .text
NEWSYM sa1dmairam
mov ebx,[SA1DMADest]
and ebx,7FFh
add ebx,IRAM
mov [sa1dmaptr],ebx
jmp executesa1dma
NEWSYM sa1dmabwram
mov ebx,[SA1DMADest]
and ebx,3FFFFh
add ebx,[SA1RAMArea]
mov [sa1dmaptr],ebx
executesa1dma:
test byte[SA1DMAInfo],1
jz .nobwram
mov ebx,[SA1DMASource]
and ebx,3FFFFh
add ebx,[SA1RAMArea]
mov [sa1dmaptrs],ebx
jmp .doneram
.nobwram
test byte[SA1DMAInfo],2
jz .noiram
mov ebx,[SA1DMASource]
and ebx,7FFh
add ebx,IRAM
mov [sa1dmaptrs],ebx
jmp .doneram
.noiram
xor ebx,ebx
mov bl,[SA1DMASource+2]
mov ebx,[snesmmap+ebx*4]
push ecx
xor ecx,ecx
mov cx,[SA1DMASource]
add ebx,ecx
mov [sa1dmaptrs],ebx
pop ecx
.doneram
push edx
push eax
push ecx
mov ecx,[SA1DMACount]
or ecx,ecx
jz .notransfer
mov ebx,[sa1dmaptrs]
mov edx,[sa1dmaptr]
.loop
mov al,[ebx]
mov [edx],al
inc ebx
inc edx
dec ecx
jnz .loop
.notransfer
pop ecx
pop eax
pop edx
ret
SECTION .bss
tempblah resb 1
SECTION .text
%macro setbit2b 2
test al,%1
jz %%nosb
or word[ebx],%2
%%nosb
%endmacro
%macro setbit2b2 2
test al,%1
jz %%nosb
or word[ebx+16],%2
%%nosb
%endmacro
; Character Conversion DMA
sa1chconv:
; or byte[SA1DoIRQ],4
or byte[SA1DoIRQ],8
; mov byte[debstop3],1
mov ebx,[SA1DMADest]
mov byte[debstop4],1
; and ebx,7FFh
and ebx,3FFFFh
add ebx,[SA1RAMArea]
mov [sa1dmaptr],ebx
mov ebx,[SA1DMASource]
and ebx,3FFFFh
add ebx,[SA1RAMArea]
mov [sa1dmaptrs],ebx
; 4 colors = 32 bytes, 16 colors = 64 bytes, 256 colors = 128 bytes
; SA1DMAChar,bit 2-4 = # of 8x8 tiles/horizontal row (0=1,1=2,2=3,..,5=32)
; SA1DMAChar,bit 0-1 = Color Mode (0=8b,1=4b,2=2b,3=?)
test byte[SA1DMAChar],1
jnz .4bit
test byte[SA1DMAChar],2
jnz near .2bit
mov ebx,[sa1dmaptr]
push ecx
pop ecx
ret
.4bit
pushad
mov edx,[sa1dmaptrs]
mov ebx,[romdata]
add ebx,4096*1024+1024*1024
mov edi,16
.loop34b
push ebx
push edx
mov ecx,32
.loop4b
mov esi,8
push ebx
push edx
.loop24b
mov word[ebx],0
mov al,[edx+3]
setbit2b 10h,0001h
setbit2b 20h,0100h
setbit2b2 40h,0001h
setbit2b2 80h,0100h
setbit2b 01h,0002h
setbit2b 02h,0200h
setbit2b2 04h,0002h
setbit2b2 08h,0200h
mov al,[edx+2]
setbit2b 10h,0004h
setbit2b 20h,0400h
setbit2b2 40h,0004h
setbit2b2 80h,0400h
setbit2b 01h,0008h
setbit2b 02h,0800h
setbit2b2 04h,0008h
setbit2b2 08h,0800h
mov al,[edx+1]
setbit2b 10h,0010h
setbit2b 20h,1000h
setbit2b2 40h,0010h
setbit2b2 80h,1000h
setbit2b 01h,0020h
setbit2b 02h,2000h
setbit2b2 04h,0020h
setbit2b2 08h,2000h
mov al,[edx]
setbit2b 10h,0040h
setbit2b 20h,4000h
setbit2b2 40h,0040h
setbit2b2 80h,4000h
setbit2b 01h,0080h
setbit2b 02h,8000h
setbit2b2 04h,0080h
setbit2b2 08h,8000h
add ebx,2
add edx,128
dec esi
jnz near .loop24b
pop edx
pop ebx
add edx,4
add ebx,32
dec ecx
jnz near .loop4b
pop edx
pop ebx
add edx,128*8
add ebx,128*8
dec edi
jnz near .loop34b
mov ecx,10*128*8
mov edx,[sa1dmaptrs]
mov ebx,[romdata]
add ebx,4096*1024+1024*1024
.next4b
mov al,[ebx]
mov [edx],al
inc ebx
inc edx
dec ecx
jnz .next4b
popad
ret
.2bit
pushad
mov edx,[sa1dmaptrs]
mov ebx,[romdata]
add ebx,4096*1024+1024*1024
mov edi,16
.loop3
push ebx
push edx
mov ecx,32
.loop
mov esi,8
push ebx
push edx
.loop2
mov word[ebx],0
mov al,[edx+1]
setbit2b 40h,0001h
setbit2b 80h,0100h
setbit2b 10h,0002h
setbit2b 20h,0200h
setbit2b 04h,0004h
setbit2b 08h,0400h
setbit2b 01h,0008h
setbit2b 02h,0800h
mov al,[edx]
setbit2b 40h,0010h
setbit2b 80h,1000h
setbit2b 10h,0020h
setbit2b 20h,2000h
setbit2b 04h,0040h
setbit2b 08h,4000h
setbit2b 01h,0080h
setbit2b 02h,8000h
add ebx,2
add edx,64
dec esi
jnz near .loop2
pop edx
pop ebx
add edx,2
add ebx,16
dec ecx
jnz near .loop
pop edx
pop ebx
add edx,64*8
add ebx,64*8
dec edi
jnz near .loop3
mov ecx,10*64*8
mov edx,[sa1dmaptrs]
mov ebx,[romdata]
add ebx,4096*1024+1024*1024
.next
mov al,[ebx]
mov [edx],al
inc ebx
inc edx
dec ecx
jnz .next
popad
ret
SECTION .bss
.numrows resd 1
SECTION .text
NEWSYM initSA1regs
setreg 2300h*4,sa12300r
setreg 2301h*4,sa12301r
setreg 2302h*4,sa12302r
setreg 2303h*4,sa12303r
setreg 2304h*4,sa12304r
setreg 2305h*4,sa12305r
setreg 2306h*4,sa12306r
setreg 2307h*4,sa12307r
setreg 2308h*4,sa12308r
setreg 2309h*4,sa12309r
setreg 230Ah*4,sa1230Ar
setreg 230Bh*4,sa1230Br
setreg 230Ch*4,sa1230Cr
setreg 230Dh*4,sa1230Dr
setreg 230Eh*4,sa1230Er
; Set IRam, memory address 3000-37FF
mov edi,3000h*4
add edi,[regptr]
mov eax,IRamRead
mov ecx,800h
.loopr
mov [edi],eax
add edi,4
dec ecx
jnz .loopr
ret
NEWSYM initSA1regsw
setregw 2200h*4,sa12200w
setregw 2201h*4,sa12201w
setregw 2202h*4,sa12202w
setregw 2203h*4,sa12203w
setregw 2204h*4,sa12204w
setregw 2205h*4,sa12205w
setregw 2206h*4,sa12206w
setregw 2207h*4,sa12207w
setregw 2208h*4,sa12208w
setregw 2209h*4,sa12209w
setregw 220Ah*4,sa1220Aw
setregw 220Bh*4,sa1220Bw
setregw 220Ch*4,sa1220Cw
setregw 220Dh*4,sa1220Dw
setregw 220Eh*4,sa1220Ew
setregw 220Fh*4,sa1220Fw
setregw 2210h*4,sa12210w
setregw 2211h*4,sa12211w
setregw 2212h*4,sa12212w
setregw 2213h*4,sa12213w
setregw 2214h*4,sa12214w
setregw 2215h*4,sa12215w
setregw 2220h*4,sa12220w
setregw 2221h*4,sa12221w
setregw 2222h*4,sa12222w
setregw 2223h*4,sa12223w
setregw 2224h*4,sa12224w
setregw 2225h*4,sa12225w
; Missing 2226-222A
; Missing 2240-224F (Bitmap register file)
setregw 2230h*4,sa12230w
setregw 2231h*4,sa12231w
setregw 2232h*4,sa12232w
setregw 2233h*4,sa12233w
setregw 2234h*4,sa12234w
setregw 2235h*4,sa12235w
setregw 2236h*4,sa12236w
setregw 2237h*4,sa12237w
setregw 2238h*4,sa12238w
setregw 2239h*4,sa12239w
setregw 223Fh*4,sa1223Fw
setregw 2250h*4,sa12250w
setregw 2251h*4,sa12251w
setregw 2252h*4,sa12252w
setregw 2253h*4,sa12253w
setregw 2254h*4,sa12254w
setregw 2259h*4,sa12259w
setregw 225Ah*4,sa1225Aw
setregw 225Bh*4,sa1225Bw
mov edi,3000h*4
add edi,[regptw]
mov eax,IRamWrite
mov ecx,800h
.loopw
mov [edi],eax
add edi,4
dec ecx
jnz .loopw
setregw 3000h*4,IRamWrite2
ret
NEWSYM SDD1Reset
setregw 4801h*4,sdd14801w
setregw 4802h*4,dbstop
setregw 4803h*4,dbstop
setregw 4804h*4,sdd14804w
setregw 4805h*4,sdd14805w
setregw 4806h*4,sdd14806w
setregw 4807h*4,sdd14807w
setregw 4808h*4,dbstop
setregw 4809h*4,dbstop
setregw 480Ah*4,dbstop
setregw 480Bh*4,dbstop
setregw 480Ch*4,dbstop
setregw 480Dh*4,dbstop
setregw 480Eh*4,dbstop
setregw 480Fh*4,dbstop
ret
NEWSYM initSDD1regs
setreg 4804h*4,sdd14804
setreg 4805h*4,sdd14805
setreg 4806h*4,sdd14806
setreg 4807h*4,sdd14807
ret
dbstop:
; mov byte[debstop3],1
ret
NEWSYM sdd14801w
cmp al,0
jne .notzero
ret
.notzero
mov byte[AddrNoIncr],0
; set banks C0h-FFh to decompressing routine
push eax
push ebx
mov eax,memtabler8+0C0h*4
mov ebx,40h
.loop
mov dword[eax],memaccessbankr8sdd1
add eax,4
dec ebx
jnz .loop
mov dword[Sdd1Mode],1
pop ebx
pop eax
ret
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