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z80: Fix remaining flags and WZ

This commit is contained in:
alyosha-tas 2018-06-07 08:10:39 -04:00
parent 275092528a
commit afd1ba38d8
1 changed files with 8 additions and 17 deletions
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25
BizHawk.Emulation.Cores/CPUs/Z80A/Z80A.cs
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@ -505,9 +505,7 @@ namespace BizHawk.Emulation.Cores.Components.Z80A
Regs[Z] = cur_instr[instr_pntr++];
Regs[W] = 0;
break;
case REP_OP_I:
case REP_OP_I:
Write_Func(cur_instr[instr_pntr++], cur_instr[instr_pntr++], cur_instr[instr_pntr++]);
ushort temp4 = cur_instr[instr_pntr++];
@ -519,30 +517,23 @@ namespace BizHawk.Emulation.Cores.Components.Z80A
DEC8_Func(B);
// take care of other flags
// taken from 'undocumented z80 documented'
// taken from 'undocumented z80 documented' and Fuse
FlagN = Regs[ALU].Bit(7);
FlagH = FlagC = (Regs[ALU] + (Regs[C] - 1) & 0xFF) > 0xFF;
FlagP = TableParity[((Regs[ALU] + (Regs[C] - 1) & 0xFF) & 7) ^ (Regs[B])];
FlagH = FlagC = ((Regs[ALU] + Regs[C] - 1) & 0xFF) < Regs[ALU];
FlagP = TableParity[((Regs[ALU] + Regs[C] - 1) & 7) ^ Regs[B]];
}
else
{
INC16_Func(L, H);
INC16_Func(L, H);
TR16_Func(Z, W, C, B);
INC16_Func(Z, W);
DEC8_Func(B);
//Read_Func(scratch, L, H);
if (opcode == 0xA2)
{
Console.Write(Regs[ALU]);
Console.Write(" ");
}
// take care of other flags
// taken from 'undocumented z80 documented'
// taken from 'undocumented z80 documented' and Fuse
FlagN = Regs[ALU].Bit(7);
FlagH = FlagC = (Regs[ALU] + (Regs[W]) & 0xFF) > 0xFF;
FlagP = TableParity[((Regs[ALU] + (Regs[W]) & 0xFF) & 7) ^ Regs[Z]];
FlagH = FlagC = ((Regs[ALU] + Regs[C] + 1) & 0xFF) < Regs[ALU];
FlagP = TableParity[((Regs[ALU] + Regs[C] + 1) & 7) ^ Regs[B]];
}
Repeat_Op();