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十七种模拟器源代码 非常有用的作课程设计不可缺少的

    %12 8
    %12 10
    %12 12
    %12 14
    add ecx,16
    sub edi,288*2
    dec dword[tleftnb]
    jnz near %%nextbm
    add edi,288*2
%5
    mov ebx,[ng16bbgval]
    add ax,2
    inc dword[bg1totng+ebx*4]
    add edi,16
    test eax,03Fh
    jz %%tileadd
%%next
    dec byte[tleftn]
    jnz near %4
    pop ebx
    ret
%%docache
    call %3
    mov byte[%9+ecx],dl
    call %10
    jmp %%returnfromcache
%%tileadd
    add ax,[bgtxadd]
    jmp %%next
%endmacro

%macro drawtileng16x1616b 12
    ; tile value : bit 15 = flipy, bit 14 = flipx, bit 13 = priority value
    ;              bit 10-12 = palette, 0-9=tile#
    mov ebx,[ng16bbgval]
    mov dl,ch
    inc dword[bg1drwng+ebx*4]
    and ecx,3FFh
    and edx,1Fh
    add ecx,[ngptrdat2]
    add cx,[taddnfy16x16]
    test dword[vrama+eax],8000h
    jz %%noflipy
    add cx,[taddfy16x16]
%%noflipy
    test dword[vrama+eax],4000h
    jz %%noflipx
    inc cx
%%noflipx
%%nexttile
    push ecx
    push edx
    mov edx,[%6+edx*4]
    %7
    jnz near %%docache
    cmp byte[%9+ecx],dl
    je %%returnfromcache
    mov byte[%9+ecx],dl
    call %10
%%returnfromcache
    cmp byte[%1+ecx],2
    je near %%done
    cmp byte[%1+ecx],0
    je near %%parttile
    %2
    ; start drawing from ecx
    test dword[vrama+eax],4000h
    jz %%noflipxfull
    add ecx,128
%%noflipxfull
    test dword[vrama+eax],8000h
    jnz near %%flipyfull
    %11 0,0
    %11 288*2,16
    %11 288*4,32
    %11 288*6,48
    %11 288*8,64
    %11 288*10,80
    %11 288*12,96
    %11 288*14,112
    jmp %%done
%%flipyfull
    %11 288*14,0
    %11 288*12,16
    %11 288*10,32
    %11 288*8,48
    %11 288*6,64
    %11 288*4,80
    %11 288*2,96
    %11 0,112
    jmp %%done
%%parttile
    %2
    ; start drawing from ecx to edi
    test word[vrama+eax],4000h
    jz %%noflipxpart
    add ecx,128
%%noflipxpart
    test word[vrama+eax],8000h
    jnz near %%flipypart
    mov dword[tleftnb],8
%%nextb
    %12 0
    %12 2
    %12 4
    %12 6
    %12 8
    %12 10
    %12 12
    %12 14
    add ecx,16
    add edi,288*2
    dec dword[tleftnb]
    jnz near %%nextb
    sub edi,288*2*8
    jmp %%done
%%flipypart
    add edi,288*2*7
    mov dword[tleftnb],8
%%nextbm
    %12 0
    %12 2
    %12 4
    %12 6
    %12 8
    %12 10
    %12 12
    %12 14
    add ecx,16
    sub edi,288*2
    dec dword[tleftnb]
    jnz near %%nextbm
    add edi,288*2
%%done
    pop edx
    pop ecx
    inc cx
    test dword[vrama+eax],4000h
    jz %%noflipxb
    sub cx,2
%%noflipxb
    add edi,16
    xor dword[switch16x16],1
    jnz near %%nexttile
%%ntile
    mov ebx,[ng16bbgval]
    add ax,2
    inc dword[bg1totng+ebx*4]
    test eax,03Fh
    jz %%tileadd
%%next
    dec byte[tleftn]
    jnz near %4
    pop ebx
    ret
%5
    add edi,32
    jmp %%ntile
%%docache
    call %3
    mov byte[%9+ecx],dl
    call %10
    jmp %%returnfromcache
%%tileadd
    add ax,[bgtxadd]
    jmp %%next
%endmacro

%macro ProcessBuildWindow 1
    mov dword[ngwinen],0
    test byte[winbg1enval+ebx+%1*256],0Ah
    jz %%nowindowing
    push eax
    push ebx
;NEWSYM winlogicaval, times 256 dw 0
    mov al,[winlogicaval+ebx*2]
    shr al,%1*2
    and al,03h
    mov [nglogicval],al
    mov eax,ebx
    add ebx,%1*256
    call BuildWindow
    mov eax,edi
    sub eax,esi
    sar eax,1
    cmp dword[ngwintable],0
    jne %%notzero
    sub [ngwintable+4],eax
    jmp %%done
%%notzero
    sub [ngwintable],eax
%%done
    pop ebx
    pop eax
%%nowindowing
%endmacro

%macro drawbgtileng16b 2
    mov dword[ng16bprval],0
    mov dword[ng16bbgval],%1
    cmp byte[t16x161+ebx+%1*256],1
    je near .tiles16x16
    push ebx
    mov eax,[BGPT1+ebx*2+%1*512]
    test ecx,100h
    jz .noyinc
    add eax,[BGPT1Y+ebx*2+%1*512]
.noyinc
    lea ecx,[ecx*8]
    and ecx,07C0h      ; 1Fh*40h
    add eax,ecx
    mov ecx,[BG1SXl+ebx*2+%1*512]
    mov edx,[BGPT1X+ebx*2+%1*512]
    test ecx,100h
    jz .noxinc
    add eax,edx
    neg dx
.noxinc
    mov edi,ecx
    sub dx,64
    and ecx,0F8h
    and eax,0FFFFh
    shr ecx,2
    mov [bgtxadd],edx
    mov [bgtxad+ebx*2+%2*512],dx
    add eax,ecx
    mov ecx,[BGOPT1+ebx*2+%1*512]
    mov edx,[BGMA+ebx]
    and edi,07h
    and edx,07h
    and ecx,0FFFFh
    mov edx,[colormodedef+edx*4+%1]
    neg edi
    add edi,edi
    cmp dl,2
    jne near .no4bit
    shr ecx,5
    add edi,esi
    mov [ngptrdat+%2*1024+ebx*4],ecx
    mov [ngptrdat2],ecx
    mov [ngceax+%2*1024+ebx*4],eax
    mov [ngcedi+%2*1024+ebx*4],edi
    ; eax = pointer to beginning of tile area
    ProcessBuildWindow %1
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng4b16b
.no4bit
    cmp dl,1
    jne near .no2bit
    shr ecx,4
    add edi,esi
    mov [ngptrdat+%2*1024+ebx*4],ecx
    mov [ngptrdat2],ecx
    mov [ngceax+%2*1024+ebx*4],eax
    mov [ngcedi+%2*1024+ebx*4],edi
    ; eax = pointer to beginning of tile area
    mov dword[mode0add],0
    ProcessBuildWindow %1
    cmp byte[BGMA+ebx],0
    jne .nomode0
    push ebx
    mov ebx,[mode0ads]
    mov [mode0add],ebx
    pop ebx
.nomode0
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng2b16b
.no2bit
    cmp dl,3
    jne near .no8bit
    shr ecx,6
    add edi,esi
    mov [ngptrdat+%2*1024+ebx*4],ecx
    mov [ngptrdat2],ecx
    mov [ngceax+%2*1024+ebx*4],eax
    mov [ngcedi+%2*1024+ebx*4],edi
    ; eax = pointer to beginning of tile area
    ProcessBuildWindow %1
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng8b16b
.no8bit
    pop ebx
    ret

.tiles16x16
    mov dword[taddnfy16x16],0
    mov dword[taddfy16x16],16
    test ecx,08h
    jz .nobottomy
    mov dword[taddnfy16x16],16
    mov dword[taddfy16x16],-16
.nobottomy
    push ebx
    mov eax,[BGPT1+ebx*2+%1*512]
    test ecx,200h
    jz .noyinc2
    add eax,[BGPT1Y+ebx*2+%1*512]
.noyinc2
    lea ecx,[ecx*4]
    and ecx,07C0h      ; 1Fh*40h
    add eax,ecx
    mov ecx,[BG1SXl+ebx*2+%1*512]
    mov edx,[BGPT1X+ebx*2+%1*512]
    test ecx,200h
    jz .noxinc2
    add eax,edx
    neg dx
.noxinc2
    mov edi,ecx
    sub dx,64
    and ecx,1F0h
    and eax,0FFFFh
    shr ecx,3
    mov [bgtxadd],edx
    mov [bgtxad+ebx*2+%2*512],dx
    add eax,ecx
    mov ecx,[BGOPT1+ebx*2+%1*512]
    mov edx,[BGMA+ebx]
    and edi,0Fh
    and edx,07h
    and ecx,0FFFFh
    mov edx,[colormodedef+edx*4+%1]
    neg edi
    add edi,edi
    cmp dl,2
    jne near .no4bit2
    shr ecx,5
    add edi,esi
    mov [ngptrdat+%2*1024+ebx*4],ecx
    mov [ngptrdat2],ecx
    mov [ngceax+%2*1024+ebx*4],eax
    mov [ngcedi+%2*1024+ebx*4],edi
    ; eax = pointer to beginning of tile area
    ProcessBuildWindow %1
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng16x164b16b
.no4bit2
    cmp dl,1
    jne near .no2bit2
    shr ecx,4
    add edi,esi
    mov [ngptrdat+%2*1024+ebx*4],ecx
    mov [ngptrdat2],ecx
    mov [ngceax+%2*1024+ebx*4],eax
    mov [ngcedi+%2*1024+ebx*4],edi
    ; eax = pointer to beginning of tile area
    mov dword[mode0add],0
    ProcessBuildWindow %1
    cmp byte[BGMA+ebx],0
    jne .nomode02
    push ebx
    mov ebx,[mode0ads]
    mov [mode0add],ebx
    pop ebx
.nomode02
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng16x162b16b
.no2bit2
    cmp dl,3
    jne near .no8bit
    shr ecx,6
    add edi,esi
    mov [ngptrdat+%2*1024+ebx*4],ecx
    mov [ngptrdat2],ecx
    mov [ngceax+%2*1024+ebx*4],eax
    mov [ngcedi+%2*1024+ebx*4],edi
    ; eax = pointer to beginning of tile area
    ProcessBuildWindow %1
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng16x168b16b
.no8bit2
    pop ebx
    ret
%endmacro

%macro drawbgtilengpr116b 2
    mov dword[ng16bprval],2000h
    mov dword[ng16bbgval],%1
    cmp byte[t16x161+ebx+%1*256],1
    je near .tiles16x16
    push ebx
    mov edx,[BGMA+ebx]
    mov ecx,[bgtxad+ebx*2+%2*512]
    and edx,07h
    mov [bgtxadd],cx
    mov ecx,[ngptrdat+%2*1024+ebx*4]
    mov edx,[colormodedef+edx*4+%1]
    mov [ngptrdat2],ecx
    mov eax,[ngceax+%2*1024+ebx*4]
    mov edi,[ngcedi+%2*1024+ebx*4]
    cmp dl,2
    jne near .no4bit
    ; eax = pointer to beginning of tile area
    ProcessBuildWindow %1
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng4b16b
.no4bit
    cmp dl,1
    jne near .no2bit
    ; eax = pointer to beginning of tile area
    mov dword[mode0add],0
    ProcessBuildWindow %1
    cmp byte[BGMA+ebx],0
    jne .nomode0
    push ebx
    mov ebx,[mode0ads]
    mov [mode0add],ebx
    pop ebx
.nomode0
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng2b16b
.no2bit
    cmp dl,3
    jne near .no8bit
    ; eax = pointer to beginning of tile area
    ProcessBuildWindow %1
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng8b16b
.no8bit
    pop ebx
    ret
.tiles16x16
    mov ecx,[BG1SYl+ebx*2+%1*512]
    and ecx,0FFFFh
    mov dword[taddnfy16x16],0
    add ecx,ebx
    mov dword[taddfy16x16],16
    test ecx,08h
    jz .nobottomy
    mov dword[taddnfy16x16],16
    mov dword[taddfy16x16],-16
.nobottomy
    push ebx
    mov edx,[BGMA+ebx]
    mov ecx,[bgtxad+ebx*2+%2*512]
    and edx,07h
    mov [bgtxadd],cx
    mov ecx,[ngptrdat+%2*1024+ebx*4]
    mov edx,[colormodedef+edx*4+%1]
    mov [ngptrdat2],ecx
    mov eax,[ngceax+%2*1024+ebx*4]
    mov edi,[ngcedi+%2*1024+ebx*4]
    cmp dl,2
    jne near .no4bit2
    ; eax = pointer to beginning of tile area
    ProcessBuildWindow %1
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng16x164b16b
.no4bit2
    cmp dl,1
    jne near .no2bit2
    ; eax = pointer to beginning of tile area
    mov dword[mode0add],0
    ProcessBuildWindow %1
    cmp byte[BGMA+ebx],0
    jne .nomode02
    push ebx
    mov ebx,[mode0ads]
    mov [mode0add],ebx
    pop ebx
.nomode02
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng16x162b16b
.no2bit2
    cmp dl,3
    jne near .no8bit2
    ; eax = pointer to beginning of tile area
    ProcessBuildWindow %1
    mov ecx,ebx
    add ecx,%2*256
    mov dl,1 << %2
    jmp drawtileng16x168b16b
.no8bit2
    pop ebx
    ret
%endmacro

%macro procpixels 3
    mov bl,[esi+%2]
    mov cl,[esi+%1]
    add bl,dl
    add cl,dl
    mov bx,[eax+ebx*2]
    shl ebx,16
    mov bx,[eax+ecx*2]
    mov [edi+%3],ebx
    xor ebx,ebx
%endmacro

%macro procpixelst 3
    mov bl,[esi+%1]
    add bl,dl
    test bl,%3
    jz %%nodraw
    mov cx,[eax+ebx*2]
    mov [edi+%2],cx
%%nodraw
%endmacro

%macro procpixelstr 3
    mov bl,[esi+%2]
    mov cl,[esi+%1]
    add bl,dl
    add cl,dl
    mov bx,[eax+ebx*2+512]
    shl ebx,16
    mov bx,[eax+ecx*2+512]
    mov [edi+%3],ebx
    xor ebx,ebx
%endmacro

%macro procpixelstt 3
    mov bl,[esi+%1]
    add bl,dl
    test bl,%3
    jz %%nodraw
    mov cx,[eax+ebx*2+512]
    mov [edi+%2],cx
%%nodraw
%endmacro

%macro procpixelsnt 3
    mov bl,[esi+%2]
    mov cl,[esi+%1]
    add bl,dl
    add cl,dl
    mov bx,[eax+ebx*2]
    shl ebx,16
    mov bx,[eax+ecx*2]
    mov [edi+%3],ebx
    xor ebx,ebx
%endmacro

%macro procpixelstnt 3
    mov bl,[esi+%1]
    add bl,dl
    test bl,%3
    jz %%nodraw
    mov cx,[eax+ebx*2]
    mov [edi+%2],cx
%%nodraw
%endmacro

%macro procpixelsmst 3
    mov bl,[esi+%2]
    mov cl,[esi+%1]
    add bl,dl
    add cl,dl
    mov bx,[eax+ebx*2+512]
    shl ebx,16
    mov bx,[eax+ecx*2+512]
    and ebx,[UnusedBitXor]
    mov [edi+%3],ebx
    mov [edi+%3+75036*2],ebx
    xor ebx,ebx
%endmacro

%macro procpixelstmst 3
    mov bl,[esi+%1]
    add bl,dl
    test bl,%3
    jz %%nodraw
    mov cx,[eax+ebx*2+512]
    mov [edi+%2],cx
    and cx,[UnusedBitXor]
    mov [edi+%2+75036*2],cx
%%nodraw
%endmacro

%macro procpixelsmsnt 3
    mov bl,[esi+%2]
    mov cl,[esi+%1]
    add bl,dl
    add cl,dl
    mov bx,[eax+ebx*2]
    shl ebx,16
    mov bx,[eax+ecx*2]
    mov [edi+%3],ebx
    mov [edi+%3+75036*2],ebx
    xor ebx,ebx
%endmacro

%macro procpixelstmsnt 3
    mov bl,[esi+%1]
    add bl,dl
    test bl,%3
    jz %%nodraw
    mov cx,[eax+ebx*2]
    mov [edi+%2],cx
    mov [edi+%2+75036*2],cx
%%nodraw
%endmacro

%macro procpixelss 3
    mov bl,[esi+%2]
    mov cl,[esi+%1]
    add bl,dl
    add cl,dl
    mov bx,[eax+ebx*2]
    shl ebx,16
    mov bx,[eax+ecx*2]
    mov [edi+%3+75036*2],ebx
    xor ebx,ebx
%endmacro

%macro procpixelsts 3
    mov bl,[esi+%1]
    add bl,dl
    test bl,%3
    jz %%nodraw