2010-06-10 14:33:16 +00:00
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/*
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AppleWin : An Apple //e emulator for Windows
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Copyright (C) 1994-1996, Michael O'Brien
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Copyright (C) 1999-2001, Oliver Schmidt
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Copyright (C) 2002-2005, Tom Charlesworth
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2011-02-21 23:54:09 +00:00
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Copyright (C) 2006-2011, Tom Charlesworth, Michael Pohoreski
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2010-06-10 14:33:16 +00:00
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AppleWin is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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AppleWin is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with AppleWin; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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2010-06-10 14:06:42 +00:00
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//===========================================================================
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static DWORD Cpu65C02 (DWORD uTotalCycles)
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{
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// Optimisation:
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// . Copy the global /regs/ vars to stack-based local vars
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// (Oliver Schmidt says this gives a performance gain, see email - The real deal: "1.10.5")
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WORD addr;
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BOOL flagc; // must always be 0 or 1, no other values allowed
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BOOL flagn; // must always be 0 or 0x80.
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BOOL flagv; // any value allowed
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BOOL flagz; // any value allowed
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WORD temp;
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WORD temp2;
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WORD val;
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AF_TO_EF
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ULONG uExecutedCycles = 0;
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WORD base;
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2011-02-21 23:54:09 +00:00
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g_bDebugBreakpointHit = 0;
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2010-06-10 14:06:42 +00:00
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do
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{
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UINT uExtraCycles = 0;
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BYTE iOpcode;
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2014-12-31 22:13:36 +00:00
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// NTSC_BEGIN
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ULONG uPreviousCycles = uExecutedCycles;
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// NTSC_END
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2016-03-21 23:48:02 +00:00
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if (GetActiveCpu() == CPU_Z80)
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2010-06-10 14:06:42 +00:00
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{
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const UINT uZ80Cycles = z80_mainloop(uTotalCycles, uExecutedCycles); CYC(uZ80Cycles)
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}
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else
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{
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2011-02-21 23:54:09 +00:00
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if (!Fetch(iOpcode, uExecutedCycles))
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break;
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2010-06-10 14:06:42 +00:00
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2016-03-21 23:48:02 +00:00
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#define $ INV // INV = Invalid -> Debugger Break
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2011-02-21 23:54:09 +00:00
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switch (iOpcode)
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{
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2016-03-21 23:48:02 +00:00
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case 0x00: BRK CYC(7) break;
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case 0x01: idx ORA CYC(6) break;
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case 0x02: $ IMM NOP CYC(2) break;
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case 0x03: $ NOP CYC(1) break;
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case 0x04: ZPG TSB CYC(5) break;
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case 0x05: ZPG ORA CYC(3) break;
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case 0x06: ZPG ASLc CYC(5) break;
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case 0x07: $ NOP CYC(1) break;
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case 0x08: PHP CYC(3) break;
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case 0x09: IMM ORA CYC(2) break;
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case 0x0A: asl CYC(2) break;
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case 0x0B: $ NOP CYC(1) break;
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case 0x0C: ABS TSB CYC(6) break;
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case 0x0D: ABS ORA CYC(4) break;
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case 0x0E: ABS ASLc CYC(6) break;
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case 0x0F: $ NOP CYC(1) break;
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case 0x10: REL BPL CYC(2) break;
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case 0x11: INDY_OPT ORA CYC(5) break;
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case 0x12: izp ORA CYC(5) break;
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case 0x13: $ NOP CYC(1) break;
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case 0x14: ZPG TRB CYC(5) break;
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case 0x15: zpx ORA CYC(4) break;
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case 0x16: zpx ASLc CYC(6) break;
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case 0x17: $ NOP CYC(1) break;
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case 0x18: CLC CYC(2) break;
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case 0x19: ABSY_OPT ORA CYC(4) break;
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case 0x1A: INA CYC(2) break;
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case 0x1B: $ NOP CYC(1) break;
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case 0x1C: ABS TRB CYC(6) break;
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case 0x1D: ABSX_OPT ORA CYC(4) break;
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case 0x1E: ABSX_OPT ASLc CYC(6) break;
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case 0x1F: $ NOP CYC(1) break;
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case 0x20: ABS JSR CYC(6) break;
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case 0x21: idx AND CYC(6) break;
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case 0x22: $ IMM NOP CYC(2) break;
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case 0x23: $ NOP CYC(1) break;
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case 0x24: ZPG BIT CYC(3) break;
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case 0x25: ZPG AND CYC(3) break;
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case 0x26: ZPG ROLc CYC(5) break;
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case 0x27: $ NOP CYC(1) break;
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case 0x28: PLP CYC(4) break;
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case 0x29: IMM AND CYC(2) break;
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case 0x2A: rol CYC(2) break;
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case 0x2B: $ NOP CYC(1) break;
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case 0x2C: ABS BIT CYC(4) break;
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case 0x2D: ABS AND CYC(4) break;
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case 0x2E: ABS ROLc CYC(6) break;
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case 0x2F: $ NOP CYC(1) break;
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case 0x30: REL BMI CYC(2) break;
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case 0x31: INDY_OPT AND CYC(5) break;
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case 0x32: izp AND CYC(5) break;
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case 0x33: $ NOP CYC(1) break;
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case 0x34: zpx BIT CYC(4) break;
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case 0x35: zpx AND CYC(4) break;
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case 0x36: zpx ROLc CYC(6) break;
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case 0x37: $ NOP CYC(1) break;
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case 0x38: SEC CYC(2) break;
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case 0x39: ABSY_OPT AND CYC(4) break;
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case 0x3A: DEA CYC(2) break;
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case 0x3B: $ NOP CYC(1) break;
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case 0x3C: ABSX_OPT BIT CYC(4) break;
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case 0x3D: ABSX_OPT AND CYC(4) break;
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case 0x3E: ABSX_OPT ROLc CYC(6) break;
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case 0x3F: $ NOP CYC(1) break;
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case 0x40: RTI CYC(6) DoIrqProfiling(uExecutedCycles); break;
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case 0x41: idx EOR CYC(6) break;
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case 0x42: $ IMM NOP CYC(2) break;
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case 0x43: $ NOP CYC(1) break;
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case 0x44: $ ZPG NOP CYC(3) break;
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case 0x45: ZPG EOR CYC(3) break;
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case 0x46: ZPG LSRc CYC(5) break;
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case 0x47: $ NOP CYC(1) break;
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case 0x48: PHA CYC(3) break;
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case 0x49: IMM EOR CYC(2) break;
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case 0x4A: lsr CYC(2) break;
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case 0x4B: $ NOP CYC(1) break;
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case 0x4C: ABS JMP CYC(3) break;
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case 0x4D: ABS EOR CYC(4) break;
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case 0x4E: ABS LSRc CYC(6) break;
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case 0x4F: $ NOP CYC(1) break;
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case 0x50: REL BVC CYC(2) break;
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case 0x51: INDY_OPT EOR CYC(5) break;
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case 0x52: izp EOR CYC(5) break;
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case 0x53: $ NOP CYC(1) break;
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case 0x54: $ zpx NOP CYC(4) break;
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case 0x55: zpx EOR CYC(4) break;
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case 0x56: zpx LSRc CYC(6) break;
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case 0x57: $ NOP CYC(1) break;
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case 0x58: CLI CYC(2) break;
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case 0x59: ABSY_OPT EOR CYC(4) break;
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case 0x5A: PHY CYC(3) break;
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case 0x5B: $ NOP CYC(1) break;
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case 0x5C: $ ABS NOP CYC(8) break;
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case 0x5D: ABSX_OPT EOR CYC(4) break;
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case 0x5E: ABSX_OPT LSRc CYC(6) break;
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case 0x5F: $ NOP CYC(1) break;
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case 0x60: RTS CYC(6) break;
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case 0x61: idx ADCc CYC(6) break;
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case 0x62: $ IMM NOP CYC(2) break;
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case 0x63: $ NOP CYC(1) break;
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case 0x64: ZPG STZ CYC(3) break;
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case 0x65: ZPG ADCc CYC(3) break;
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case 0x66: ZPG RORc CYC(5) break;
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case 0x67: $ NOP CYC(1) break;
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case 0x68: PLA CYC(4) break;
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case 0x69: IMM ADCc CYC(2) break;
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case 0x6A: ror CYC(2) break;
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case 0x6B: $ NOP CYC(1) break;
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case 0x6C: IABS_CMOS JMP CYC(6) break;
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case 0x6D: ABS ADCc CYC(4) break;
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case 0x6E: ABS RORc CYC(6) break;
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case 0x6F: $ NOP CYC(1) break;
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case 0x70: REL BVS CYC(2) break;
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case 0x71: INDY_OPT ADCc CYC(5) break;
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case 0x72: izp ADCc CYC(5) break;
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case 0x73: $ NOP CYC(1) break;
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case 0x74: zpx STZ CYC(4) break;
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case 0x75: zpx ADCc CYC(4) break;
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case 0x76: zpx RORc CYC(6) break;
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case 0x77: $ NOP CYC(1) break;
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case 0x78: SEI CYC(2) break;
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case 0x79: ABSY_OPT ADCc CYC(4) break;
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case 0x7A: PLY CYC(4) break;
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case 0x7B: $ NOP CYC(1) break;
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case 0x7C: IABSX JMP CYC(6) break;
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case 0x7D: ABSX_OPT ADCc CYC(4) break;
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case 0x7E: ABSX_OPT RORc CYC(6) break;
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case 0x7F: $ NOP CYC(1) break;
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case 0x80: REL BRA CYC(2) break;
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case 0x81: idx STA CYC(6) break;
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case 0x82: $ IMM NOP CYC(2) break;
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case 0x83: $ NOP CYC(1) break;
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case 0x84: ZPG STY CYC(3) break;
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case 0x85: ZPG STA CYC(3) break;
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case 0x86: ZPG STX CYC(3) break;
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case 0x87: $ NOP CYC(1) break;
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case 0x88: DEY CYC(2) break;
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case 0x89: IMM BITI CYC(2) break;
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case 0x8A: TXA CYC(2) break;
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case 0x8B: $ NOP CYC(1) break;
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case 0x8C: ABS STY CYC(4) break;
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case 0x8D: ABS STA CYC(4) break;
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case 0x8E: ABS STX CYC(4) break;
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case 0x8F: $ NOP CYC(1) break;
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case 0x90: REL BCC CYC(2) break;
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case 0x91: INDY_CONST STA CYC(6) break;
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case 0x92: izp STA CYC(5) break;
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case 0x93: $ NOP CYC(1) break;
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case 0x94: zpx STY CYC(4) break;
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case 0x95: zpx STA CYC(4) break;
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case 0x96: zpy STX CYC(4) break;
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case 0x97: $ NOP CYC(1) break;
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case 0x98: TYA CYC(2) break;
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case 0x99: ABSY_CONST STA CYC(5) break;
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case 0x9A: TXS CYC(2) break;
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case 0x9B: $ NOP CYC(1) break;
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case 0x9C: ABS STZ CYC(4) break;
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case 0x9D: ABSX_CONST STA CYC(5) break;
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case 0x9E: ABSX_CONST STZ CYC(5) break;
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case 0x9F: $ NOP CYC(1) break;
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case 0xA0: IMM LDY CYC(2) break;
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case 0xA1: idx LDA CYC(6) break;
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case 0xA2: IMM LDX CYC(2) break;
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case 0xA3: $ NOP CYC(1) break;
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case 0xA4: ZPG LDY CYC(3) break;
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case 0xA5: ZPG LDA CYC(3) break;
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case 0xA6: ZPG LDX CYC(3) break;
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case 0xA7: $ NOP CYC(1) break;
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case 0xA8: TAY CYC(2) break;
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case 0xA9: IMM LDA CYC(2) break;
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case 0xAA: TAX CYC(2) break;
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case 0xAB: $ NOP CYC(1) break;
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case 0xAC: ABS LDY CYC(4) break;
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case 0xAD: ABS LDA CYC(4) break;
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case 0xAE: ABS LDX CYC(4) break;
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case 0xAF: $ NOP CYC(1) break;
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case 0xB0: REL BCS CYC(2) break;
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case 0xB1: INDY_OPT LDA CYC(5) break;
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case 0xB2: izp LDA CYC(5) break;
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case 0xB3: $ NOP CYC(1) break;
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case 0xB4: zpx LDY CYC(4) break;
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case 0xB5: zpx LDA CYC(4) break;
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case 0xB6: zpy LDX CYC(4) break;
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case 0xB7: $ NOP CYC(1) break;
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case 0xB8: CLV CYC(2) break;
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case 0xB9: ABSY_OPT LDA CYC(4) break;
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case 0xBA: TSX CYC(2) break;
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case 0xBB: $ NOP CYC(1) break;
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case 0xBC: ABSX_OPT LDY CYC(4) break;
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case 0xBD: ABSX_OPT LDA CYC(4) break;
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case 0xBE: ABSY_OPT LDX CYC(4) break;
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case 0xBF: $ NOP CYC(1) break;
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case 0xC0: IMM CPY CYC(2) break;
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case 0xC1: idx CMP CYC(6) break;
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case 0xC2: $ IMM NOP CYC(2) break;
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case 0xC3: $ NOP CYC(1) break;
|
|
|
|
|
case 0xC4: ZPG CPY CYC(3) break;
|
|
|
|
|
case 0xC5: ZPG CMP CYC(3) break;
|
|
|
|
|
case 0xC6: ZPG DEC CYC(5) break;
|
|
|
|
|
case 0xC7: $ NOP CYC(1) break;
|
|
|
|
|
case 0xC8: INY CYC(2) break;
|
|
|
|
|
case 0xC9: IMM CMP CYC(2) break;
|
|
|
|
|
case 0xCA: DEX CYC(2) break;
|
|
|
|
|
case 0xCB: $ NOP CYC(1) break;
|
|
|
|
|
case 0xCC: ABS CPY CYC(4) break;
|
|
|
|
|
case 0xCD: ABS CMP CYC(4) break;
|
|
|
|
|
case 0xCE: ABS DEC CYC(6) break;
|
|
|
|
|
case 0xCF: $ NOP CYC(1) break;
|
|
|
|
|
case 0xD0: REL BNE CYC(2) break;
|
|
|
|
|
case 0xD1: INDY_OPT CMP CYC(5) break;
|
|
|
|
|
case 0xD2: izp CMP CYC(5) break;
|
|
|
|
|
case 0xD3: $ NOP CYC(1) break;
|
|
|
|
|
case 0xD4: $ zpx NOP CYC(4) break;
|
|
|
|
|
case 0xD5: zpx CMP CYC(4) break;
|
|
|
|
|
case 0xD6: zpx DEC CYC(6) break;
|
|
|
|
|
case 0xD7: $ NOP CYC(1) break;
|
|
|
|
|
case 0xD8: CLD CYC(2) break;
|
|
|
|
|
case 0xD9: ABSY_OPT CMP CYC(4) break;
|
|
|
|
|
case 0xDA: PHX CYC(3) break;
|
|
|
|
|
case 0xDB: $ NOP CYC(1) break;
|
|
|
|
|
case 0xDC: $ ABS LDD CYC(4) break;
|
|
|
|
|
case 0xDD: ABSX_OPT CMP CYC(4) break;
|
|
|
|
|
case 0xDE: ABSX_CONST DEC CYC(7) break;
|
|
|
|
|
case 0xDF: $ NOP CYC(1) 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(1) break;
|
|
|
|
|
case 0xE4: ZPG CPX CYC(3) break;
|
|
|
|
|
case 0xE5: ZPG SBCc CYC(3) break;
|
|
|
|
|
case 0xE6: ZPG INC CYC(5) break;
|
|
|
|
|
case 0xE7: $ NOP CYC(1) break;
|
|
|
|
|
case 0xE8: INX CYC(2) break;
|
|
|
|
|
case 0xE9: IMM SBCc CYC(2) break;
|
|
|
|
|
case 0xEA: NOP CYC(2) break;
|
|
|
|
|
case 0xEB: $ NOP CYC(1) break;
|
|
|
|
|
case 0xEC: ABS CPX CYC(4) break;
|
|
|
|
|
case 0xED: ABS SBCc CYC(4) break;
|
|
|
|
|
case 0xEE: ABS INC CYC(6) break;
|
|
|
|
|
case 0xEF: $ NOP CYC(1) break;
|
|
|
|
|
case 0xF0: REL BEQ CYC(2) break;
|
|
|
|
|
case 0xF1: INDY_OPT SBCc CYC(5) break;
|
|
|
|
|
case 0xF2: izp SBCc CYC(5) break;
|
|
|
|
|
case 0xF3: $ NOP CYC(1) break;
|
|
|
|
|
case 0xF4: $ zpx NOP CYC(4) break;
|
|
|
|
|
case 0xF5: zpx SBCc CYC(4) break;
|
|
|
|
|
case 0xF6: zpx INC CYC(6) break;
|
|
|
|
|
case 0xF7: $ NOP CYC(1) break;
|
|
|
|
|
case 0xF8: SED CYC(2) break;
|
|
|
|
|
case 0xF9: ABSY_OPT SBCc CYC(4) break;
|
|
|
|
|
case 0xFA: PLX CYC(4) break;
|
|
|
|
|
case 0xFB: $ NOP CYC(1) break;
|
|
|
|
|
case 0xFC: $ ABS LDD CYC(4) break;
|
|
|
|
|
case 0xFD: ABSX_OPT SBCc CYC(4) break;
|
|
|
|
|
case 0xFE: ABSX_CONST INC CYC(7) break;
|
|
|
|
|
case 0xFF: $ NOP CYC(1) break;
|
2011-02-21 23:54:09 +00:00
|
|
|
}
|
2010-06-13 14:34:41 +00:00
|
|
|
#undef $
|
2010-06-10 14:06:42 +00:00
|
|
|
}
|
|
|
|
|
|
2014-12-31 22:13:36 +00:00
|
|
|
// NTSC_BEGIN
|
2016-05-17 21:03:45 +00:00
|
|
|
if (!g_bFullSpeed)
|
|
|
|
|
{
|
|
|
|
|
ULONG uElapsedCycles = uExecutedCycles - uPreviousCycles;
|
|
|
|
|
NTSC_VideoUpdateCycles( uElapsedCycles );
|
|
|
|
|
}
|
2014-12-31 22:13:36 +00:00
|
|
|
// NTSC_END
|
|
|
|
|
|
2010-06-10 14:06:42 +00:00
|
|
|
CheckInterruptSources(uExecutedCycles);
|
2016-10-22 18:50:35 +00:00
|
|
|
NMI(uExecutedCycles, flagc, flagn, flagv, flagz);
|
|
|
|
|
IRQ(uExecutedCycles, flagc, flagn, flagv, flagz);
|
2010-06-10 14:06:42 +00:00
|
|
|
|
2011-02-21 23:54:09 +00:00
|
|
|
if( IsDebugBreakpointHit() )
|
2010-06-10 14:06:42 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
} while (uExecutedCycles < uTotalCycles);
|
|
|
|
|
|
2011-02-21 23:54:09 +00:00
|
|
|
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();
|
|
|
|
|
|
2010-06-10 14:06:42 +00:00
|
|
|
return uExecutedCycles;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
//===========================================================================
|
