text: /* FCE Ultra - NES/Famicom Emulator
   *
   * Copyright notice for this file:
   *  Copyright (C) 2002 Xodnizel
   *
   * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
   */
  
  #ifndef _FCEU_OPS_H
  #define _FCEU_OPS_H
  
  case 0x00:  /* BRK */
  			_PC++;
  			PUSH(_PC>>8);
  			PUSH(_PC);
  			PUSH(_P|U_FLAG|B_FLAG);
  			_P|=I_FLAG;
  			_PI|=I_FLAG;
  			_PC=RdMem(0xFFFE);
  			_PC|=RdMem(0xFFFF)<<8;
  			break;
  
  case 0x40:  /* RTI */
  			_P=POP();
  			/* _PI=_P; This is probably incorrect, so it's commented out. */
  			_PI = _P;
  			_PC=POP();
  			_PC|=POP()<<8;
  			break;
  
  case 0x60:  /* RTS */
  			_PC=POP();
  			_PC|=POP()<<8;
  			_PC++;
  			break;
  
  case 0x48: /* PHA */
  			PUSH(_A);
  			break;
  case 0x08: /* PHP */
  			PUSH(_P|U_FLAG|B_FLAG);
  			break;
  case 0x68: /* PLA */
  			_A=POP();
  			X_ZN(_A);
  			break;
  case 0x28: /* PLP */
  			_P=POP();
  			break;
  case 0x4C:
  		{
  			uint16 ptmp=_PC;
  			uint32 npc;
  
  			npc=RdMem(ptmp);
  			ptmp++;
  			npc|=RdMem(ptmp)<<8;
  			_PC=npc;
  		}
  		break; /* JMP ABSOLUTE */
  case 0x6C:
  			{
  			uint32 tmp;
  			GetAB(tmp);
  			_PC=RdMem(tmp);
  			_PC|=RdMem( ((tmp+1)&0x00FF) | (tmp&0xFF00))<<8;
  			}
  			break;
  case 0x20: /* JSR */
  			{
  			uint8 npc;
  			npc=RdMem(_PC);
  			_PC++;
  			PUSH(_PC>>8);
  			PUSH(_PC);
  			_PC=RdMem(_PC)<<8;
  			_PC|=npc;
  			}
  			break;
  
  case 0xAA: /* TAX */
  			_X=_A;
  			X_ZN(_A);
  			break;
  
  case 0x8A: /* TXA */
  			_A=_X;
  			X_ZN(_A);
  			break;
  
  case 0xA8: /* TAY */
  			_Y=_A;
  			X_ZN(_A);
  			break;
  case 0x98: /* TYA */
  			_A=_Y;
  			X_ZN(_A);
  			break;
  
  case 0xBA: /* TSX */
  			_X=_S;
  			X_ZN(_X);
  			break;
  case 0x9A: /* TXS */
  			_S=_X;
  			break;
  
  case 0xCA: /* DEX */
  			_X--;
  			X_ZN(_X);
  			break;
  case 0x88: /* DEY */
  			_Y--;
  			X_ZN(_Y);
  			break;
  
  case 0xE8: /* INX */
  			_X++;
  			X_ZN(_X);
  			break;
  case 0xC8: /* INY */
  			_Y++;
  			X_ZN(_Y);
  			break;
  
  case 0x18: /* CLC */
  			_P&=~C_FLAG;
  			break;
  case 0xD8: /* CLD */
  			_P&=~D_FLAG;
  			break;
  case 0x58: /* CLI */
  			_P&=~I_FLAG;
  			break;
  case 0xB8: /* CLV */
  			_P&=~V_FLAG;
  			break;
  
  case 0x38: /* SEC */
  			_P|=C_FLAG;
  			break;
  case 0xF8: /* SED */
  			_P|=D_FLAG;
  			break;
  case 0x78: /* SEI */
  			_P|=I_FLAG;
  			break;
  
  case 0xEA: /* NOP */
  			break;
  
  case 0x0A: RMW_A(ASL);
  case 0x06: RMW_ZP(ASL);
  case 0x16: RMW_ZPX(ASL);
  case 0x0E: RMW_AB(ASL);
  case 0x1E: RMW_ABX(ASL);
  
  case 0xC6: RMW_ZP(DEC);
  case 0xD6: RMW_ZPX(DEC);
  case 0xCE: RMW_AB(DEC);
  case 0xDE: RMW_ABX(DEC);
  
  case 0xE6: RMW_ZP(INC);
  case 0xF6: RMW_ZPX(INC);
  case 0xEE: RMW_AB(INC);
  case 0xFE: RMW_ABX(INC);
  
  case 0x4A: RMW_A(LSR);
  case 0x46: RMW_ZP(LSR);
  case 0x56: RMW_ZPX(LSR);
  case 0x4E: RMW_AB(LSR);
  case 0x5E: RMW_ABX(LSR);
  
  case 0x2A: RMW_A(ROL);
  case 0x26: RMW_ZP(ROL);
  case 0x36: RMW_ZPX(ROL);
  case 0x2E: RMW_AB(ROL);
  case 0x3E: RMW_ABX(ROL);
  
  case 0x6A: RMW_A(ROR);
  case 0x66: RMW_ZP(ROR);
  case 0x76: RMW_ZPX(ROR);
  case 0x6E: RMW_AB(ROR);
  case 0x7E: RMW_ABX(ROR);
  
  case 0x69: LD_IM(ADC);
  case 0x65: LD_ZP(ADC);
  case 0x75: LD_ZPX(ADC);
  case 0x6D: LD_AB(ADC);
  case 0x7D: LD_ABX(ADC);
  case 0x79: LD_ABY(ADC);
  case 0x61: LD_IX(ADC);
  case 0x71: LD_IY(ADC);
  
  case 0x29: LD_IM(AND);
  case 0x25: LD_ZP(AND);
  case 0x35: LD_ZPX(AND);
  case 0x2D: LD_AB(AND);
  case 0x3D: LD_ABX(AND);
  case 0x39: LD_ABY(AND);
  case 0x21: LD_IX(AND);
  case 0x31: LD_IY(AND);
  
  case 0x24: LD_ZP(BIT);
  case 0x2C: LD_AB(BIT);
  
  case 0xC9: LD_IM(CMP);
  case 0xC5: LD_ZP(CMP);
  case 0xD5: LD_ZPX(CMP);
  case 0xCD: LD_AB(CMP);
  case 0xDD: LD_ABX(CMP);
  case 0xD9: LD_ABY(CMP);
  case 0xC1: LD_IX(CMP);
  case 0xD1: LD_IY(CMP);
  
  case 0xE0: LD_IM(CPX);
  case 0xE4: LD_ZP(CPX);
  case 0xEC: LD_AB(CPX);
  
  case 0xC0: LD_IM(CPY);
  case 0xC4: LD_ZP(CPY);
  case 0xCC: LD_AB(CPY);
  
  case 0x49: LD_IM(EOR);
  case 0x45: LD_ZP(EOR);
  case 0x55: LD_ZPX(EOR);
  case 0x4D: LD_AB(EOR);
  case 0x5D: LD_ABX(EOR);
  case 0x59: LD_ABY(EOR);
  case 0x41: LD_IX(EOR);
  case 0x51: LD_IY(EOR);
  
  case 0xA9: LD_IM(LDA);
  case 0xA5: LD_ZP(LDA);
  case 0xB5: LD_ZPX(LDA);
  case 0xAD: LD_AB(LDA);
  case 0xBD: LD_ABX(LDA);
  case 0xB9: LD_ABY(LDA);
  case 0xA1: LD_IX(LDA);
  case 0xB1: LD_IY(LDA);
  
  case 0xA2: LD_IM(LDX);
  case 0xA6: LD_ZP(LDX);
  case 0xB6: LD_ZPY(LDX);
  case 0xAE: LD_AB(LDX);
  case 0xBE: LD_ABY(LDX);
  
  case 0xA0: LD_IM(LDY);
  case 0xA4: LD_ZP(LDY);
  case 0xB4: LD_ZPX(LDY);
  case 0xAC: LD_AB(LDY);
  case 0xBC: LD_ABX(LDY);
  
  case 0x09: LD_IM(ORA);
  case 0x05: LD_ZP(ORA);
  case 0x15: LD_ZPX(ORA);
  case 0x0D: LD_AB(ORA);
  case 0x1D: LD_ABX(ORA);
  case 0x19: LD_ABY(ORA);
  case 0x01: LD_IX(ORA);
  case 0x11: LD_IY(ORA);
  
  case 0xEB:  /* (undocumented) */
  case 0xE9: LD_IM(SBC);
  case 0xE5: LD_ZP(SBC);
  case 0xF5: LD_ZPX(SBC);
  case 0xED: LD_AB(SBC);
  case 0xFD: LD_ABX(SBC);
  case 0xF9: LD_ABY(SBC);
  case 0xE1: LD_IX(SBC);
  case 0xF1: LD_IY(SBC);
  
  case 0x85: ST_ZP(_A);
  case 0x95: ST_ZPX(_A);
  case 0x8D: ST_AB(_A);
  case 0x9D: ST_ABX(_A);
  case 0x99: ST_ABY(_A);
  case 0x81: ST_IX(_A);
  case 0x91: ST_IY(_A);
  
  case 0x86: ST_ZP(_X);
  case 0x96: ST_ZPY(_X);
  case 0x8E: ST_AB(_X);
  
  case 0x84: ST_ZP(_Y);
  case 0x94: ST_ZPX(_Y);
  case 0x8C: ST_AB(_Y);
  
  /* BCC */
  case 0x90: JR(!(_P&C_FLAG)); break;
  
  /* BCS */
  case 0xB0: JR(_P&C_FLAG); break;
  
  /* BEQ */
  case 0xF0: JR(_P&Z_FLAG); break;
  
  /* BNE */
  case 0xD0: JR(!(_P&Z_FLAG)); break;
  
  /* BMI */
  case 0x30: JR(_P&N_FLAG); break;
  
  /* BPL */
  case 0x10: JR(!(_P&N_FLAG)); break;
  
  /* BVC */
  case 0x50: JR(!(_P&V_FLAG)); break;
  
  /* BVS */
  case 0x70: JR(_P&V_FLAG); break;
  
  //default: printf("Bad %02x at $%04x\n",b1,X.PC);break;
  //ifdef moo
  /* Here comes the undocumented instructions block.  Note that this implementation
  		may be "wrong".  If so, please tell me.
  */
  
  /* AAC */
  case 0x2B:
  case 0x0B: LD_IM(AND;_P&=~C_FLAG;_P|=_A>>7);
  
  /* AAX */
  case 0x87: ST_ZP(_A&_X);
  case 0x97: ST_ZPY(_A&_X);
  case 0x8F: ST_AB(_A&_X);
  case 0x83: ST_IX(_A&_X);
  
  /* ARR - ARGH, MATEY! */
  case 0x6B: {
  				uint8 arrtmp;
  				LD_IM(AND;_P&=~V_FLAG;_P|=(_A^(_A>>1))&0x40;arrtmp=_A>>7;_A>>=1;_A|=(_P&C_FLAG)<<7;_P&=~C_FLAG;_P|=arrtmp;X_ZN(_A));
  			}
  /* ASR */
  case 0x4B: LD_IM(AND;LSRA);
  
  /* ATX(OAL) Is this(OR with $EE) correct? */
  case 0xAB: LD_IM(_A|=0xEE;AND;_X=_A);
  
  /* AXS */
  case 0xCB: LD_IM(AXS);
  
  /* DCP */
  case 0xC7: RMW_ZP(DEC;CMP);
  case 0xD7: RMW_ZPX(DEC;CMP);
  case 0xCF: RMW_AB(DEC;CMP);
  case 0xDF: RMW_ABX(DEC;CMP);
  case 0xDB: RMW_ABY(DEC;CMP);
  case 0xC3: RMW_IX(DEC;CMP);
  case 0xD3: RMW_IY(DEC;CMP);
  
  /* ISB */
  case 0xE7: RMW_ZP(INC;SBC);
  case 0xF7: RMW_ZPX(INC;SBC);
  case 0xEF: RMW_AB(INC;SBC);
  case 0xFF: RMW_ABX(INC;SBC);
  case 0xFB: RMW_ABY(INC;SBC);
  case 0xE3: RMW_IX(INC;SBC);
  case 0xF3: RMW_IY(INC;SBC);
  
  /* DOP */
  
  case 0x04: _PC++;break;
  case 0x14: _PC++;break;
  case 0x34: _PC++;break;
  case 0x44: _PC++;break;
  case 0x54: _PC++;break;
  case 0x64: _PC++;break;
  case 0x74: _PC++;break;
  
  case 0x80: _PC++;break;
  case 0x82: _PC++;break;
  case 0x89: _PC++;break;
  case 0xC2: _PC++;break;
  case 0xD4: _PC++;break;
  case 0xE2: _PC++;break;
  case 0xF4: _PC++;break;
  
  /* KIL */
  
  case 0x02:
  case 0x12:
  case 0x22:
  case 0x32:
  case 0x42:
  case 0x52:
  case 0x62:
  case 0x72:
  case 0x92:
  case 0xB2:
  case 0xD2:
  case 0xF2:ADDCYC(0xFF);
  		_jammed=1;
  		_PC--;
  		break;
  
  /* LAR */
  case 0xBB: RMW_ABY(_S&=x;_A=_X=_S;X_ZN(_X));
  
  /* LAX */
  case 0xA7: LD_ZP(LDA;LDX);
  case 0xB7: LD_ZPY(LDA;LDX);
  case 0xAF: LD_AB(LDA;LDX);
  case 0xBF: LD_ABY(LDA;LDX);
  case 0xA3: LD_IX(LDA;LDX);
  case 0xB3: LD_IY(LDA;LDX);
  
  /* NOP */
  case 0x1A:
  case 0x3A:
  case 0x5A:
  case 0x7A:
  case 0xDA:
  case 0xFA: break;
  
  /* RLA */
  case 0x27: RMW_ZP(ROL;AND);
  case 0x37: RMW_ZPX(ROL;AND);
  case 0x2F: RMW_AB(ROL;AND);
  case 0x3F: RMW_ABX(ROL;AND);
  case 0x3B: RMW_ABY(ROL;AND);
  case 0x23: RMW_IX(ROL;AND);
  case 0x33: RMW_IY(ROL;AND);
  
  /* RRA */
  case 0x67: RMW_ZP(ROR;ADC);
  case 0x77: RMW_ZPX(ROR;ADC);
  case 0x6F: RMW_AB(ROR;ADC);
  case 0x7F: RMW_ABX(ROR;ADC);
  case 0x7B: RMW_ABY(ROR;ADC);
  case 0x63: RMW_IX(ROR;ADC);
  case 0x73: RMW_IY(ROR;ADC);
  
  /* SLO */
  case 0x07: RMW_ZP(ASL;ORA);
  case 0x17: RMW_ZPX(ASL;ORA);
  case 0x0F: RMW_AB(ASL;ORA);
  case 0x1F: RMW_ABX(ASL;ORA);
  case 0x1B: RMW_ABY(ASL;ORA);
  case 0x03: RMW_IX(ASL;ORA);
  case 0x13: RMW_IY(ASL;ORA);
  
  /* SRE */
  case 0x47: RMW_ZP(LSR;EOR);
  case 0x57: RMW_ZPX(LSR;EOR);
  case 0x4F: RMW_AB(LSR;EOR);
  case 0x5F: RMW_ABX(LSR;EOR);
  case 0x5B: RMW_ABY(LSR;EOR);
  case 0x43: RMW_IX(LSR;EOR);
  case 0x53: RMW_IY(LSR;EOR);
  
  /* AXA - SHA */
  case 0x93: ST_IY(_A&_X&(((A-_Y)>>8)+1));
  case 0x9F: ST_ABY(_A&_X&(((A-_Y)>>8)+1));
  
  /* SYA */
  case 0x9C: ST_ABX(_Y&(((A-_X)>>8)+1));
  
  /* SXA */
  case 0x9E: ST_ABY(_X&(((A-_Y)>>8)+1));
  
  /* XAS */
  case 0x9B: _S=_A&_X;ST_ABY(_S& (((A-_Y)>>8)+1) );
  
  /* TOP */
  case 0x0C: LD_AB(;);
  case 0x1C:
  case 0x3C:
  case 0x5C:
  case 0x7C:
  case 0xDC:
  case 0xFC: LD_ABX(;);
  
  /* XAA - BIG QUESTION MARK HERE */
  case 0x8B: _A|=0xEE; _A&=_X; LD_IM(AND);
  //endif
  //
  #endif
  