First release of ZSNES sources

zsnes/src/cpu/spcdef.inc

@@ -0,0 +1,168 @@
+;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.
+
+
+
+
+
+
+
+
+; move al at address ebx
+
+; branch instructions
+%macro spcbrancher 0
+      inc ebp
+      ret
+.branch
+      movsx ebx,byte [ebp]
+      inc ebp
+      add ebp,ebx
+      ret
+%endmacro      
+
+; tcall instruction
+%macro spctcall 1
+      mov ebx,ebp
+      sub ebx,spcRam
+      mov eax,[spcS]
+      mov [spcRam+eax],bh
+      dec byte [spcS]
+      mov eax,[spcS]
+      mov [spcRam+eax],bl
+      dec byte [spcS]
+      mov bx,[spcextraram+%1]
+      test byte[spcRam+0F1h],80h
+      jnz %%finished
+      mov bx,[spcRam+0FFC0h+%1]
+%%finished
+      add ebx,spcRam
+      mov ebp,ebx
+      ret
+%endmacro
+
+; SET1 instruction
+%macro set1 1
+      mov bl,[ebp]
+      add ebx,[spcRamDP]
+      inc ebp
+      push ebx
+      ReadByte
+      pop ebx
+      or al,%1
+      WriteByte
+      ret
+%endmacro
+
+; CLR1 instruction
+%macro clr1 1
+      mov bl,[ebp]
+      add ebx,[spcRamDP]
+      inc ebp
+      push ebx
+      ReadByte
+      pop ebx
+      and al,%1
+      WriteByte
+      ret
+%endmacro
+
+; BBS instruction
+%macro bbs 1
+      mov bl,[ebp]
+      add ebx,[spcRamDP]
+      ReadByte
+      test al,%1
+      jnz .dp0jump
+      add ebp,2
+      ret
+.dp0jump
+      movsx ebx,byte [ebp+1]
+      add ebp,ebx
+      add ebp,2
+      ret
+%endmacro
+
+; BBC instruction
+%macro bbc 1
+      mov bl,[ebp]
+      add ebx,[spcRamDP]
+      ReadByte
+      test al,%1
+      jz .dp0jump
+      add ebp,2
+      ret
+.dp0jump
+      movsx ebx,byte [ebp+1]
+      add ebp,ebx
+      add ebp,2
+      ret
+%endmacro
+
+; OR A, instruction
+%macro SPC_OR_A 0
+      or byte [spcA], al
+      mov al,[spcA]
+      mov [spcNZ],al
+      ret
+%endmacro
+
+; AND A, instruction
+%macro SPC_AND_A 0
+      and byte [spcA], al
+      mov al,[spcA]
+      mov [spcNZ],al
+      ret
+%endmacro
+
+; EOR A, instruction
+%macro SPC_EOR_A 0
+      xor byte [spcA], al
+      mov al,[spcA]
+      mov [spcNZ],al
+      ret
+%endmacro
+
+; CMP A, instruction
+%macro SPC_CMP_A 0
+      cmp byte [spcA], al
+      cmc
+      SPCSetFlagnzc
+%endmacro
+
+%macro SPC_ADC_A 0
+      mov cl,[spcP]
+      shr cl,1
+      adc byte [spcA], al
+      SPCSetFlagnvhzc
+%endmacro
+
+%macro SPC_SBC_A 0
+      mov cl,[spcP]
+      xor cl,1
+      shr cl,1
+      sbb byte [spcA], al
+      cmc
+      SPCSetFlagnvhzc
+%endmacro
+
+%macro SPC_MOV_A 0
+      mov byte [spcA], al
+      mov [spcNZ],al
+      ret
+%endmacro
+