/* AppleWin : An Apple //e emulator for Windows Copyright (C) 1994-1996, Michael O'Brien Copyright (C) 1999-2001, Oliver Schmidt Copyright (C) 2002-2005, Tom Charlesworth Copyright (C) 2006-2011, Tom Charlesworth, Michael Pohoreski AppleWin 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. AppleWin 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 AppleWin; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ //=========================================================================== static DWORD Cpu65C02 (DWORD uTotalCycles) { // Optimisation: // . Copy the global /regs/ vars to stack-based local vars // (Oliver Schmidt says this gives a performance gain, see email - The real deal: "1.10.5") WORD addr; BOOL flagc; // must always be 0 or 1, no other values allowed BOOL flagn; // must always be 0 or 0x80. BOOL flagv; // any value allowed BOOL flagz; // any value allowed WORD temp; WORD temp2; WORD val; AF_TO_EF ULONG uExecutedCycles = 0; WORD base; g_bDebugBreakpointHit = 0; do { UINT uExtraCycles = 0; BYTE iOpcode; if (g_ActiveCPU == CPU_Z80) { const UINT uZ80Cycles = z80_mainloop(uTotalCycles, uExecutedCycles); CYC(uZ80Cycles) } else { if (!Fetch(iOpcode, uExecutedCycles)) break; switch (iOpcode) { #define $ INV // INV = Invalid -> Debugger Break case 0x00: BRK CYC(7) break; case 0x01: idx ORA CYC(6) break; case 0x02: $ IMM NOP CYC(2) break; case 0x03: $ NOP CYC(2) break; case 0x04: ZPG TSB CYC(5) break; case 0x05: ZPG ORA CYC(3) break; case 0x06: ZPG ASLc CYC(5) break; case 0x07: $ NOP CYC(2) break; case 0x08: PHP CYC(3) break; case 0x09: IMM ORA CYC(2) break; case 0x0A: asl CYC(2) break; case 0x0B: $ NOP CYC(2) break; case 0x0C: ABS TSB CYC(6) break; case 0x0D: ABS ORA CYC(4) break; case 0x0E: ABS ASLc CYC(6) break; case 0x0F: $ NOP CYC(2) break; case 0x10: REL BPL CYC(2) break; case 0x11: INDY_SLOW ORA CYC(5) break; case 0x12: izp ORA CYC(5) break; case 0x13: $ NOP CYC(2) break; case 0x14: ZPG TRB CYC(5) break; case 0x15: zpx ORA CYC(4) break; case 0x16: zpx ASLc CYC(6) break; case 0x17: $ NOP CYC(2) break; case 0x18: CLC CYC(2) break; case 0x19: ABSY_SLOW ORA CYC(4) break; case 0x1A: INA CYC(2) break; case 0x1B: $ NOP CYC(2) break; case 0x1C: ABS TRB CYC(6) break; case 0x1D: ABSX_SLOW ORA CYC(4) break; case 0x1E: ABSX_SLOW ASLc CYC(6) break; case 0x1F: $ NOP CYC(2) break; case 0x20: ABS JSR CYC(6) break; case 0x21: idx AND CYC(6) break; case 0x22: $ IMM NOP CYC(2) break; case 0x23: $ NOP CYC(2) break; case 0x24: ZPG BIT CYC(3) break; case 0x25: ZPG AND CYC(3) break; case 0x26: ZPG ROLc CYC(5) break; case 0x27: $ NOP CYC(2) break; case 0x28: PLP CYC(4) break; case 0x29: IMM AND CYC(2) break; case 0x2A: rol CYC(2) break; case 0x2B: $ NOP CYC(2) break; case 0x2C: ABS BIT CYC(4) break; case 0x2D: ABS AND CYC(2) break; case 0x2E: ABS ROLc CYC(6) break; case 0x2F: $ NOP CYC(2) break; case 0x30: REL BMI CYC(2) break; case 0x31: INDY_SLOW AND CYC(5) break; case 0x32: izp AND CYC(5) break; case 0x33: $ NOP CYC(2) break; case 0x34: zpx BIT CYC(4) break; case 0x35: zpx AND CYC(4) break; case 0x36: zpx ROLc CYC(6) break; case 0x37: $ NOP CYC(2) break; case 0x38: SEC CYC(2) break; case 0x39: ABSY_SLOW AND CYC(4) break; case 0x3A: DEA CYC(2) break; case 0x3B: $ NOP CYC(2) break; case 0x3C: ABSX_SLOW BIT CYC(4) break; case 0x3D: ABSX_SLOW AND CYC(4) break; case 0x3E: ABSX_SLOW ROLc CYC(6) break; case 0x3F: $ NOP CYC(2) break; case 0x40: RTI CYC(6) DoIrqProfiling(uExecutedCycles); break; case 0x41: idx EOR CYC(6) break; case 0x42: $ IMM NOP CYC(2) break; case 0x43: $ NOP CYC(2) break; case 0x44: $ ZPG NOP CYC(3) break; case 0x45: ZPG EOR CYC(3) break; case 0x46: ZPG LSRc CYC(5) break; case 0x47: $ NOP CYC(2) break; case 0x48: PHA CYC(3) break; case 0x49: IMM EOR CYC(2) break; case 0x4A: lsr CYC(2) break; case 0x4B: $ NOP CYC(2) break; case 0x4C: ABS JMP CYC(3) break; case 0x4D: ABS EOR CYC(4) break; case 0x4E: ABS LSRc CYC(6) break; case 0x4F: $ NOP CYC(2) break; case 0x50: REL BVC CYC(2) break; case 0x51: INDY_SLOW EOR CYC(5) break; case 0x52: izp EOR CYC(5) break; case 0x53: $ NOP CYC(2) break; case 0x54: $ zpx NOP CYC(4) break; case 0x55: zpx EOR CYC(4) break; case 0x56: zpx LSRc CYC(6) break; case 0x57: $ NOP CYC(2) break; case 0x58: CLI CYC(2) break; case 0x59: ABSY_SLOW EOR CYC(4) break; case 0x5A: PHY CYC(3) break; case 0x5B: $ NOP CYC(2) break; case 0x5C: $ ABSX_SLOW NOP CYC(8) break; case 0x5D: ABSX_SLOW EOR CYC(4) break; case 0x5E: ABSX_SLOW LSRc CYC(6) break; case 0x5F: $ NOP CYC(2) break; case 0x60: RTS CYC(6) break; case 0x61: idx ADCc CYC(6) break; case 0x62: $ IMM NOP CYC(2) break; case 0x63: $ NOP CYC(2) break; case 0x64: ZPG STZ CYC(3) break; case 0x65: ZPG ADCc CYC(3) break; case 0x66: ZPG RORc CYC(5) break; case 0x67: $ NOP CYC(2) break; case 0x68: PLA CYC(4) break; case 0x69: IMM ADCc CYC(2) break; case 0x6A: ror CYC(2) break; case 0x6B: $ NOP CYC(2) break; case 0x6C: IABSCMOS JMP CYC(6) break; case 0x6D: ABS ADCc CYC(4) break; case 0x6E: ABS RORc CYC(6) break; case 0x6F: $ NOP CYC(2) break; case 0x70: REL BVS CYC(2) break; case 0x71: INDY_SLOW ADCc CYC(5) break; case 0x72: izp ADCc CYC(5) break; case 0x73: $ NOP CYC(2) break; case 0x74: zpx STZ CYC(4) break; case 0x75: zpx ADCc CYC(4) break; case 0x76: zpx RORc CYC(6) break; case 0x77: $ NOP CYC(2) break; case 0x78: SEI CYC(2) break; case 0x79: ABSY_SLOW ADCc CYC(4) break; case 0x7A: PLY CYC(4) break; case 0x7B: $ NOP CYC(2) break; case 0x7C: IABSX JMP CYC(6) break; // case 0x7D: ABSX_SLOW ADCc CYC(4) break; case 0x7E: ABSX_SLOW RORc CYC(6) break; case 0x7F: $ NOP CYC(2) break; case 0x80: REL BRA CYC(2) break; case 0x81: idx STA CYC(6) break; case 0x82: $ IMM NOP CYC(2) break; case 0x83: $ NOP CYC(2) break; case 0x84: ZPG STY CYC(3) break; case 0x85: ZPG STA CYC(3) break; case 0x86: ZPG STX CYC(3) break; case 0x87: $ NOP CYC(2) break; case 0x88: DEY CYC(2) break; case 0x89: IMM BITI CYC(2) break; case 0x8A: TXA CYC(2) break; case 0x8B: $ NOP CYC(2) break; case 0x8C: ABS STY CYC(4) break; case 0x8D: ABS STA CYC(4) break; case 0x8E: ABS STX CYC(4) break; case 0x8F: $ NOP CYC(2) break; case 0x90: REL BCC CYC(2) break; case 0x91: INDY_FAST STA CYC(6) break; case 0x92: izp STA CYC(5) break; case 0x93: $ NOP CYC(2) break; case 0x94: zpx STY CYC(4) break; case 0x95: zpx STA CYC(4) break; case 0x96: zpy STX CYC(4) break; case 0x97: $ NOP CYC(2) break; case 0x98: TYA CYC(2) break; case 0x99: ABSY_FAST STA CYC(5) break; case 0x9A: TXS CYC(2) break; case 0x9B: $ NOP CYC(2) break; case 0x9C: ABS STZ CYC(4) break; case 0x9D: ABSX_FAST STA CYC(5) break; case 0x9E: ABSX_FAST STZ CYC(5) break; case 0x9F: $ NOP CYC(2) break; case 0xA0: IMM LDY CYC(2) break; case 0xA1: idx LDA CYC(6) break; case 0xA2: IMM LDX CYC(2) break; case 0xA3: $ NOP CYC(2) break; case 0xA4: ZPG LDY CYC(3) break; case 0xA5: ZPG LDA CYC(3) break; case 0xA6: ZPG LDX CYC(3) break; case 0xA7: $ NOP CYC(2) break; case 0xA8: TAY CYC(2) break; case 0xA9: IMM LDA CYC(2) break; case 0xAA: TAX CYC(2) break; case 0xAB: $ NOP CYC(2) break; case 0xAC: ABS LDY CYC(4) break; case 0xAD: ABS LDA CYC(4) break; case 0xAE: ABS LDX CYC(4) break; case 0xAF: $ NOP CYC(2) break; case 0xB0: REL BCS CYC(2) break; case 0xB1: INDY_SLOW LDA CYC(5) break; case 0xB2: izp LDA CYC(5) break; case 0xB3: $ NOP CYC(2) break; case 0xB4: zpx LDY CYC(4) break; case 0xB5: zpx LDA CYC(4) break; case 0xB6: zpy LDX CYC(4) break; case 0xB7: $ NOP CYC(2) break; case 0xB8: CLV CYC(2) break; case 0xB9: ABSY_SLOW LDA CYC(4) break; case 0xBA: TSX CYC(2) break; case 0xBB: $ NOP CYC(2) break; case 0xBC: ABSX_SLOW LDY CYC(4) break; case 0xBD: ABSX_SLOW LDA CYC(4) break; case 0xBE: ABSY_SLOW LDX CYC(4) break; case 0xBF: $ NOP CYC(2) break; case 0xC0: IMM CPY CYC(2) break; case 0xC1: idx CMP CYC(6) break; case 0xC2: $ IMM NOP CYC(2) break; case 0xC3: $ NOP CYC(2) break; case 0xC4: ZPG CPY CYC(3) break; case 0xC5: ZPG CMP CYC(3) break; case 0xC6: ZPG DECc CYC(5) break; case 0xC7: $ NOP CYC(2) break; case 0xC8: INY CYC(2) break; case 0xC9: IMM CMP CYC(2) break; case 0xCA: DEX CYC(2) break; case 0xCB: $ NOP CYC(2) break; case 0xCC: ABS CPY CYC(4) break; case 0xCD: ABS CMP CYC(4) break; case 0xCE: ABS DECc CYC(5) break; case 0xCF: $ NOP CYC(2) break; case 0xD0: REL BNE CYC(2) break; case 0xD1: INDY_SLOW CMP CYC(5) break; case 0xD2: izp CMP CYC(5) break; case 0xD3: $ NOP CYC(2) break; case 0xD4: $ zpx NOP CYC(4) break; case 0xD5: zpx CMP CYC(4) break; case 0xD6: zpx DECc CYC(6) break; case 0xD7: $ NOP CYC(2) break; case 0xD8: CLD CYC(2) break; case 0xD9: ABSY_SLOW CMP CYC(4) break; case 0xDA: PHX CYC(3) break; case 0xDB: $ NOP CYC(2) break; case 0xDC: $ ABSX_SLOW NOP CYC(4) break; case 0xDD: ABSX_SLOW CMP CYC(4) break; case 0xDE: ABSX_SLOW DECc CYC(6) break; case 0xDF: $ NOP CYC(2) break; case 0xE0: IMM CPX CYC(2) break; case 0xE1: idx SBCc CYC(6) break; case 0xE2: $ IMM NOP CYC(2) break; case 0xE3: $ NOP CYC(2) break; case 0xE4: ZPG CPX CYC(3) break; case 0xE5: ZPG SBCc CYC(3) break; case 0xE6: ZPG INCc CYC(5) break; case 0xE7: $ NOP CYC(2) break; case 0xE8: INX CYC(2) break; case 0xE9: IMM SBCc CYC(2) break; case 0xEA: NOP CYC(2) break; case 0xEB: $ NOP CYC(2) break; case 0xEC: ABS CPX CYC(4) break; case 0xED: ABS SBCc CYC(4) break; case 0xEE: ABS INCc CYC(6) break; case 0xEF: $ NOP CYC(2) break; case 0xF0: REL BEQ CYC(2) break; case 0xF1: INDY_SLOW SBCc CYC(5) break; case 0xF2: izp SBCc CYC(5) break; case 0xF3: $ NOP CYC(2) break; case 0xF4: $ zpx NOP CYC(4) break; case 0xF5: zpx SBCc CYC(4) break; case 0xF6: zpx INCc CYC(6) break; case 0xF7: $ NOP CYC(2) break; case 0xF8: SED CYC(2) break; case 0xF9: ABSY_SLOW SBCc CYC(4) break; case 0xFA: PLX CYC(4) break; case 0xFB: $ NOP CYC(2) break; case 0xFC: $ ABSX_SLOW NOP CYC(4) break; case 0xFD: ABSX_SLOW SBCc CYC(4) break; case 0xFE: ABSX_SLOW INCc CYC(6) break; case 0xFF: $ NOP CYC(2) break; } #undef $ } CheckInterruptSources(uExecutedCycles); NMI(uExecutedCycles, uExtraCycles, flagc, flagn, flagv, flagz); IRQ(uExecutedCycles, uExtraCycles, flagc, flagn, flagv, flagz); if( IsDebugBreakpointHit() ) break; } while (uExecutedCycles < uTotalCycles); EF_TO_AF // Emulator Flags to Apple Flags if( g_bDebugBreakpointHit ) if ((g_nAppMode != MODE_DEBUG) && (g_nAppMode != MODE_STEPPING)) // Running at full speed? (debugger not running) RequestDebugger(); return uExecutedCycles; } //===========================================================================