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[PCE] Implement T-flag operation of AND instruction, mostly fixing Legendary Axe

This commit is contained in:
beirich 2011-02-27 16:41:48 +00:00
parent 907c562174
commit dd109b76da
3 changed files with 235 additions and 155 deletions
BizHawk.Emulation
CPUs/HuC6280
Execute.cs
Consoles/PC Engine
Compat.txt
CpuCoreGenerator/HuC6280
Instructions.cs

370
BizHawk.Emulation/CPUs/HuC6280/Execute.cs
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File diff suppressed because it is too large Load Diff

2
BizHawk.Emulation/Consoles/PC Engine/Compat.txt
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@ -24,7 +24,7 @@ Gunboat - Crash / CPU Break (Needs BRAM)
Hisou Kihei Serd - Doesn't boot
Idol Hanafuda Fan Club - Doesn't boot
Impossamole - Gfx issues
Legendary Axe - Boots with bad gfx corruption - needs a T-flag opcode update
Legendary Axe - BYR updated on the wrong line of the screen, but playable.
Legendary Axe II - Some gfx issues, but playable now
Madoo Granzort - Graphics issues because VPC renderer is not using new frame timing
MML Demo - Echo channels are too loud (equal volume!)

18
CpuCoreGenerator/HuC6280/Instructions.cs
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@ -6,7 +6,7 @@ namespace HuC6280
{
private string SetNZ(string val)
{
return "P = (byte)((P & 0x5D) | TableNZ[" + val + "]);";
return "P = (byte)((P & 0x7D) | TableNZ[" + val + "]);";
}
private void ADC(OpcodeInfo op, TextWriter w)
@ -46,9 +46,17 @@ namespace HuC6280
private void AND(OpcodeInfo op, TextWriter w)
{
GetValue8(op, w, "value8");
w.WriteLine(Spaces + "A &= value8;");
w.WriteLine(Spaces + SetNZ("A"));
w.WriteLine(Spaces + "PendingCycles -= {0};", op.Cycles);
w.WriteLine(Spaces + "if (FlagT == false) { ");
w.WriteLine(Spaces + " A &= value8;");
w.WriteLine(Spaces + " " + SetNZ("A"));
w.WriteLine(Spaces + " PendingCycles -= {0};", op.Cycles);
w.WriteLine(Spaces + "} else {");
w.WriteLine(Spaces + " temp8 = ReadMemory((ushort)(0x2000 + X));");
w.WriteLine(Spaces + " temp8 &= value8;");
w.WriteLine(Spaces + " " + SetNZ("temp8"));
w.WriteLine(Spaces + " WriteMemory((ushort)(0x2000 + X), temp8);");
w.WriteLine(Spaces + " PendingCycles -= {0};", op.Cycles + 3);
w.WriteLine(Spaces + "}");
}
private void ASL(OpcodeInfo op, TextWriter w)
@ -459,7 +467,7 @@ namespace HuC6280
{
w.WriteLine(" int a; // TODO remove these extra checks"); // TODO remove these extra checks
w.WriteLine(" string b = Disassemble(PC, out a);");
w.WriteLine(" if (b.StartsWith(\"ADC\") == false && b.StartsWith(\"EOR\") == false)");
w.WriteLine(" if (b.StartsWith(\"ADC\") == false && b.StartsWith(\"EOR\") == false && b.StartsWith(\"AND\") == false)");
w.WriteLine(" Console.WriteLine(\"SETTING T FLAG, NEXT INSTRUCTION IS UNHANDLED: {0}\", b);");
w.WriteLine(Spaces + "FlagT = true;");
w.WriteLine(Spaces + "PendingCycles -= {0};", op.Cycles);