65816dc.inc

linux下的任天堂模拟器代码。供大家参考。

;Copyright (C) 1997-2007 ZSNES Team ( zsKnight, _Demo_, pagefault, Nach )
;
;http://www.zsnes.com
;http://sourceforge.net/projects/zsnes
;https://zsnes.bountysource.com
;
;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.



EXTSYM flagnz,flago,flagc,cpucycle,cycpbl,cycpblt,opcjmptab,doirqnext,dmadata

;*******************************************************
; Flag Setting Macros
;*******************************************************


%macro endloop 0
    sub dword[cycpbl],55
    jnc %%skipallspc
    mov eax,[cycpblt]
    mov bl,[ebp]
    add dword[cycpbl],eax
    ; 1260, 10000/12625
    inc ebp
    call dword [opcjmptab+ebx*4]
    xor ebx,ebx
%%skipallspc
    mov bl,[esi]
    inc esi
    sub dh,[cpucycle+ebx]
    jc %%cpuover
    jmp dword [edi+ebx*4]
%%cpuover
    ret
%endmacro

%macro restoredl 0
   mov dword[flagnz],0
   test dl,80h
   jz %%noneg
   or dword[flagnz],10000h
%%noneg
   test dl,2h
   jnz %%zero
   or dword[flagnz],1
%%zero
   mov dword[flagc],0
   test dl,01h
   jz %%nocarry
   mov dword[flagc],0FFh
%%nocarry
   mov dword[flago],0
   test dl,40h
   jz %%nov
   mov dword[flago],0FFh
%%nov
%endmacro

%macro makedl 0
   and dl,00111100b
   test dword[flagnz],18000h
   jz %%noneg
   or dl,80h
%%noneg
   test dword[flagnz],0FFFFh
   jnz %%nozero
   or dl,02h
%%nozero
   test dword[flagc],0FFh
   jz %%nocarry
   or dl,01h
%%nocarry
   test dword[flago],0FFh
   jz %%nov
   or dl,40h
%%nov
%endmacro

; Sets flags n and z according to al
%macro flagsetnz8b 0
    mov dword[flagnz],0
    mov [flagnz+1],al
    endloop
%endmacro

; Sets flags n and z according to ax
%macro flagsetnz16b 0
    mov cx,ax
    mov [flagnz],ecx
    endloop
%endmacro

; Sets flags n and z according to al
%macro flagsetnz8bnel 0
    mov dword[flagnz],0
    mov [flagnz+1],al
%endmacro

; Sets flags n and z according to ax
%macro flagsetnz16bnel 0
    mov cx,ax
    mov [flagnz],ecx
%endmacro

; Sets flags N V . . . . Z C according to flags
%macro flagsetnvzc8b 0
    mov dword[flagnz],0
    mov al,[xa]
    seto byte[flago]
    mov [flagnz+1],al
    jc .carry
    mov dword[flagc],0h
    endloop
.carry
    mov dword[flagc],0FFh
    endloop
%endmacro

%macro flagsetnvzc16b 0
    mov cx,[xa]
    seto byte[flago]
    mov [flagnz],ecx
    jc .carry
    mov dword[flagc],0h
    endloop
.carry
    mov dword[flagc],0FFh
    endloop
%endmacro

; Sets flags N V . . . . Z C according to flags
%macro flagsetnvzcs8b 0
    mov dword[flagnz],0
    mov al,[xa]
    seto byte[flago]
    mov [flagnz+1],al
    jc .carry
    mov dword[flagc],0FFh
    endloop
.carry
    mov dword[flagc],0h
    endloop
%endmacro

%macro flagsetnvzcs16b 0
    mov cx,[xa]
    seto byte[flago]
    mov [flagnz],ecx
    jc .carry
    mov dword[flagc],0FFh
    endloop
.carry
    mov dword[flagc],0h
    endloop
%endmacro

; Sets flags N V . . . . Z C for 16-bit decimal mode only
%macro flagsetnvzcd 0
    mov cx,[xa]
    seto byte[flago]
    mov [flagnz],ecx
    jc .carry
    mov dword[flagc],0h
    endloop
.carry
    mov dword[flagc],0FFh
    endloop
%endmacro

; Sets flags N . . . . . Z C according to flags and don't jump to execloop
%macro flagsetnzc8b 0
    mov dword[flagnz],0
    mov dword[flagc],0h
    mov [flagnz+1],al
    jnc .carry
    mov dword[flagc],0FFh
.carry
%endmacro

; Sets flags N . . . . . Z C according to flags and don't jump to execloop
%macro flagsetnzc 0
    mov cx,ax
    mov dword[flagc],0h
    mov [flagnz],ecx
    jnc .carry
    mov dword[flagc],0FFh
.carry
%endmacro

; Sets flags N . . . . . Z C according to flags and jump to execloop
%macro flagsetnzcel8b 0
    mov dword[flagnz],0h
    jc .carry
    mov [flagnz+1],cl
    mov dword[flagc],0FFh
    endloop
.carry
    mov [flagnz+1],cl
    mov dword[flagc],0h
    endloop
%endmacro

%macro flagsetnzcel16b 0
    jc .carry
    mov [flagnz],ecx
    mov dword[flagc],0FFh
    endloop
.carry
    mov [flagnz],ecx
    mov dword[flagc],0h
    endloop
%endmacro

;*******************************************************
; Opcode Instructions
;*******************************************************

%macro ADCMacro8bnd 0
    mov cl,[flagc]
    add cl,cl
    adc [xa],al
    flagsetnvzc8b
%endmacro

%macro ADCMacro16bnd 0
    mov cl,[flagc]
    add cl,cl
    adc [xa],ax
    flagsetnvzc16b
%endmacro

%macro ADCMacro8bd 0
    mov cl,[flagc]
    add cl,cl
    mov cl,al
    mov al,[xa]
    adc al,cl
    daa
    mov [xa],al
    flagsetnvzc8b
    endloop
%endmacro

%macro ADCMacro16bd 0
    mov cl,[flagc]
    add cl,cl
    mov cx,ax
    mov al,[xa]
    adc al,cl
    daa
    mov [xa],al
    mov al,[xa+1]
    adc al,ch
    daa
    mov [xa+1],al
    flagsetnvzcd
%endmacro

%macro ANDMacro8b 0
    and al,[xa]
    mov dword[flagnz],0
    mov [xa],al
    mov [flagnz+1],al
    endloop
%endmacro

%macro ANDMacro16b 0
    and eax,[xa]
    mov [xa],ax
    flagsetnz16b
%endmacro

%macro ASLMacro8b 0
    add al,al
    flagsetnzc8b
%endmacro

%macro ASLMacro16b 0
    add ax,ax
    flagsetnzc
%endmacro

%macro JumpMacro 0
    movsx eax,byte[esi]
    add esi,eax
.skip
    inc esi
    endloop
%endmacro

%macro BITMacroim8b 0
    mov al,[esi]
    test dword[flagnz],18000h
    jz .notflagnz
    or dword[flagnz],10000h
.notflagnz
    inc esi
    test [xa],al
    jz .zero
    mov word[flagnz],1
    endloop
.zero
    mov word[flagnz],0
    endloop
%endmacro

%macro BITMacroim16b 0
    mov ax,[esi]
    test dword[flagnz],18000h
    jz .notflagnz
    or dword[flagnz],10000h
.notflagnz
    add esi,2
    test [xa],ax
    jz .zero
    mov word[flagnz],1
    endloop
.zero
    mov word[flagnz],0
    endloop
%endmacro

%macro BITMacro8b 0
    mov dword[flagnz],10000h
    test al,80h
    jnz .flagn
    mov dword[flagnz],0
.flagn
    mov dword[flago],1
    test al,40h
    jnz .flago
    mov dword[flago],0
.flago
    test [xa],al
    jz .zero
    mov word[flagnz],1
    endloop
.zero
    mov word[flagnz],0
    endloop
%endmacro

%macro BITMacro16b 0
    mov dword[flagnz],10000h
    test ax,8000h
    jnz .flagn
    mov dword[flagnz],0
.flagn
    mov dword[flago],1
    test ax,4000h
    jnz .flago
    mov dword[flago],0
.flago
    test [xa],ax
    jz .zero
    mov word[flagnz],1
    endloop
.zero
    mov word[flagnz],0
    endloop
%endmacro

%macro BRKMacro 0
    inc esi
    test byte[xe],1
    jne near BRKemulmode
    mov bl,[xpb]
    mov ax,[xpc]
    test eax,8000h
    jz .loweraddr2
    mov eax,[snesmmap+ebx*4]
    jmp .nextaddr
.loweraddr2
    mov eax,[snesmap2+ebx*4]
.nextaddr
    mov ebx,esi
    sub ebx,eax
    mov [xpc],bx
    mov eax,[wramdata]
    xor ebx,ebx
    mov bx,[xs]
    mov cl,[xpb]
    mov [eax+ebx],cl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    mov cl,[xpc+1]
    mov [eax+ebx],cl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    mov cl,[xpc]
    mov [eax+ebx],cl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    makedl
    mov [eax+ebx],dl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    mov [xs],bx
    xor bh,bh
    mov bl,[xirqb]
    mov [xpb],bl
    xor eax,eax
    mov ax,[brkv]
    mov [xpc],ax
    and dl,11110011b
    or dl,00000100b
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
    mov esi,[snesmap2+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
BRKemulmode
    mov bl,[xpb]
    mov ax,[xpc]
    test eax,8000h
    jz .loweraddr2
    mov eax,[snesmmap+ebx*4]
    jmp .nextaddr
.loweraddr2
    mov eax,[snesmap2+ebx*4]
.nextaddr
    mov ebx,esi
    sub ebx,eax
    mov [xpc],bx
    mov eax,[wramdata]
    xor ebx,ebx
    mov bx,[xs]
    mov cl,[xpc+1]
    mov [eax+ebx],cl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    mov cl,[xpc]
    mov [eax+ebx],cl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    makedl
    mov [eax+ebx],dl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    mov [xs],bx
    xor bh,bh
    mov bl,[xpb]
    xor eax,eax
    mov ax,[brkv8]
    mov [xpc],ax
    and dl,11110011b
    or dl,00000100b
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
    mov esi,[snesmap2+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
%endmacro

%macro BRLMacro 0
    mov ax,[xpc]
    mov bl,[xpb]
    test eax,8000h
    jz .loweraddr2
    mov eax,[snesmmap+ebx*4]
    jmp .nextaddr
.loweraddr2
    mov eax,[snesmap2+ebx*4]
.nextaddr
    mov ebx,esi
    sub ebx,eax
    add bx,2
    xor eax,eax
    add bx,[esi]
    mov ax,bx
    xor ebx,ebx
    mov [xpc],ax
    mov bl,[xpb]
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
    mov esi,[snesmap2+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
%endmacro

%macro CMPMacro8b 0
    mov cl,[xa]
    sub cl,al
    flagsetnzcel8b
%endmacro

%macro CMPMacro16b 0
    mov cx,[xa]
    sub cx,ax
    flagsetnzcel16b
%endmacro

%macro COPMacro 0
    inc esi
    test byte[xe],1
    jne near COPemulmode
    mov bl,[xpb]
    mov ax,[xpc]
    test eax,8000h
    jz .loweraddr2
    mov eax,[snesmmap+ebx*4]
    jmp .nextaddr
.loweraddr2
    mov eax,[snesmap2+ebx*4]
.nextaddr
    mov ebx,esi
    sub ebx,eax
    mov [xpc],bx
    mov eax,[wramdata]
    xor ebx,ebx
    mov bx,[xs]
    mov cl,[xpb]
    mov [eax+ebx],cl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    mov cl,[xpc+1]
    mov [eax+ebx],cl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    mov cl,[xpc]
    mov [eax+ebx],cl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    makedl
    mov [eax+ebx],dl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    mov [xs],bx
    xor bh,bh
    mov bl,[xirqb]
    mov [xpb],bl
    xor eax,eax
    mov ax,[copv]
    mov [xpc],ax
    and dl,11110011b
    or dl,00000100b
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
    mov esi,[snesmap2+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
COPemulmode
    mov bl,[xpb]
    mov ax,[xpc]
    test eax,8000h
    jz .loweraddr2
    mov eax,[snesmmap+ebx*4]
    jmp .nextaddr
.loweraddr2
    mov eax,[snesmap2+ebx*4]
.nextaddr
    mov ebx,esi
    sub ebx,eax
    mov [xpc],bx
    mov eax,[wramdata]
    xor ebx,ebx
    mov bx,[xs]
    mov cl,[xpc+1]
    mov [eax+ebx],cl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    mov cl,[xpc]
    mov [eax+ebx],cl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    makedl
    mov [eax+ebx],dl
    dec bx
    and bx,word[stackand]
    or bx,word[stackor]
    mov [xs],bx
    xor bh,bh
    mov bl,[xpb]
    xor eax,eax
    mov ax,[copv8]
    mov [xpc],ax
    and dl,11110011b
    or dl,00000100b
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
    mov esi,[snesmap2+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
%endmacro

%macro CPXMacro8b 0
    mov cl,[xx]
    sub cl,al
    flagsetnzcel8b
%endmacro

%macro CPXMacro16b 0
    mov cx,[xx]
    sub cx,ax
    flagsetnzcel16b
%endmacro

%macro CPYMacro8b 0
    mov cl,[xy]
    sub cl,al
    flagsetnzcel8b
%endmacro

%macro CPYMacro16b 0
    mov cx,[xy]
    sub cx,ax
    flagsetnzcel16b
%endmacro

%macro EORMacro8b 0
    xor al,[xa]
    mov dword[flagnz],0
    mov [xa],al
    mov [flagnz+1],al
    endloop
%endmacro

%macro EORMacro16b 0
    xor eax,[xa]
    mov [xa],ax
    flagsetnz16b
%endmacro

%macro JMLMacro 0
    mov cx,[esi]
    xor eax,eax
    call membank0r16
    add cx,2
    push eax
    call membank0r8
    mov bl,al
    pop eax
    mov [xpc],ax
    mov [xpb],bl
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
    mov esi,[snesmap2+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
%endmacro


%macro JMPMacro4C 0
    xor eax,eax
    mov ax,[esi]
    mov bl,[xpb]
    mov [xpc],ax
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
;    mov esi,[snesmap2+ebx*4]
;    mov [initaddrl],esi
;    add esi,eax
;    endloop
    mov esi,[snesmap2+ebx*4]
    cmp eax,4300h
    jae .upperlower
    mov [initaddrl],esi
    add esi,eax
    endloop
.upperlower
    cmp dword[memtabler8+ebx*4],regaccessbankr8
    je .dma
    mov [initaddrl],esi
    add esi,eax
    endloop
.dma
    mov esi,dmadata-4300h
    mov [initaddrl],esi
    add esi,eax
    endloop
%endmacro

%macro JMPMacro6C 0
    mov cx,[esi]
    xor eax,eax
    call membank0r16
    mov [xpc],ax
    mov bl,[xpb]
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
    mov esi,[snesmap2+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
%endmacro

%macro JMPMacro7C 0
    mov cx,[esi]
    xor eax,eax
    add cx,[xx]
    mov bl,[xpb]
    call dword [memtabler16+ebx*4]
    mov [xpc],ax
    mov bl,[xpb]
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
    mov esi,[snesmap2+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
%endmacro

%macro JMPMacro5C 0
    xor eax,eax
    mov bl,[esi+2]
    mov ax,[esi]
    mov [xpb],bl
    mov [xpc],ax
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
    mov esi,[snesmap2+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
%endmacro

%macro JSLMacro 0
    mov ebx,esi
    sub ebx,[initaddrl]
    add bx,2
    mov [xpc],bx

    mov cx,[xs]
    mov al,[xpb]
    call membank0w8

    dec cx
    or cx,word[stackor]
    mov al,[xpc+1]
    call membank0w8

    dec cx
    or cx,word[stackor]
    mov al,[xpc]
    call membank0w8

    dec cx
    or cx,word[stackor]

    mov [xs],cx
    xor eax,eax
    xor bh,bh
    mov ax,[esi]
    mov bl,[esi+2]
    mov [xpc],ax
    mov [xpb],bl
    test eax,8000h
    jz .loweraddr
    mov esi,[snesmmap+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
.loweraddr
    mov esi,[snesmap2+ebx*4]
    mov [initaddrl],esi
    add esi,eax
    endloop
%endmacro

%macro JSRMacro20 0
    mov ebx,esi
    sub ebx,[initaddrl]
    inc bx
    mov [xpc],bx

    mov cx,[xs]
    mov al,[xpc+1]
    call membank0w8

    dec cx
    or cx,word[stackor]
    mov al,[xpc]
    call membank0w8