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fix bad bugs in instruction generation

This commit is contained in:
zeromus 2011-06-07 00:56:11 +00:00
parent 39193561fe
commit a7b50ee399
1 changed files with 20 additions and 10 deletions
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30
CpuCoreGenerator/MOS 6502/CoreGenerator.cs
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@ -15,11 +15,11 @@ namespace M6502
AbsoluteX,
AbsoluteX_P, //* page-crossing penalty
AbsoluteY,
AbsoluteY_P,//* page-crossing penalty
AbsoluteY_P, //* page-crossing penalty
Indirect,
IndirectX,
IndirectY,
IndirectY_P,
IndirectY_P, //* page-crossing penalty
Relative
}
@ -405,10 +405,6 @@ namespace M6502
{
if (Opcodes[i] != null)
{
if (i == 0x91)
{
int zzz = 9;
}
EmulateOpcode(w, i);
}
}
@ -558,20 +554,34 @@ namespace M6502
w.WriteLine(Spaces + dest + " = ReadWord(PC); PC += 2;"); break;
case AddrMode.AbsoluteX:
w.WriteLine(Spaces + dest + " = (ushort)(ReadWord(PC)+X);");
w.WriteLine(Spaces + "if ((PC & 0xFF00) != ((PC+Y) & 0xFF00)) ");
w.WriteLine(Spaces + "PC += 2;");
break;
case AddrMode.AbsoluteX_P:
w.WriteLine(Spaces + "temp16 = ReadWord(PC);");
w.WriteLine(Spaces + dest + " = (ushort)(temp16+X);");
w.WriteLine(Spaces + "if ((temp16 & 0xFF00) != ((temp16 + X) & 0xFF00)) ");
w.WriteLine(Spaces + " { PendingCycles--; TotalExecutedCycles++; }");
w.WriteLine(Spaces + "PC += 2;");
break;
case AddrMode.AbsoluteY:
w.WriteLine(Spaces + dest + " = (ushort)(ReadWord(PC)+Y);");
w.WriteLine(Spaces + "if ((PC & 0xFF00) != ((PC+Y) & 0xFF00)) ");
w.WriteLine(Spaces + "PC += 2;");
break;
case AddrMode.AbsoluteY_P:
w.WriteLine(Spaces + "temp16 = ReadWord(PC);");
w.WriteLine(Spaces + dest + " = (ushort)(temp16+Y);");
w.WriteLine(Spaces + "if ((temp16 & 0xFF00) != ((temp16 + Y) & 0xFF00)) ");
w.WriteLine(Spaces + " { PendingCycles--; TotalExecutedCycles++; }");
w.WriteLine(Spaces + "PC += 2;");
break;
case AddrMode.IndirectX:
w.WriteLine(Spaces + dest + " = ReadWordPageWrap((byte)(ReadMemory(PC++)+X));"); break;
w.WriteLine(Spaces + "temp16 = ReadWordPageWrap(ReadMemory(PC++));");
w.WriteLine(Spaces + dest + " = (ushort)(temp16+X);");
break;
case AddrMode.IndirectY:
w.WriteLine(Spaces + dest + " = ReadWordPageWrap((byte)(ReadMemory(PC++)+Y));"); break;
w.WriteLine(Spaces + "temp16 = ReadWordPageWrap(ReadMemory(PC++));");
w.WriteLine(Spaces + dest + " = (ushort)(temp16+Y);");
break;
case AddrMode.IndirectY_P:
w.WriteLine(Spaces + "temp16 = ReadWordPageWrap(ReadMemory(PC++));");
w.WriteLine(Spaces + dest + " = (ushort)(temp16+Y);");