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O2Hawk: DAA work, might still be wrongfor some cases.

This commit is contained in:
alyosha-tas 2019-12-31 21:46:59 -05:00
parent 8548859a67
commit edefd123d5
1 changed files with 8 additions and 5 deletions
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11
BizHawk.Emulation.Cores/CPUs/Intel8048/Operations.cs
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@ -35,6 +35,12 @@ namespace BizHawk.Emulation.Common.Components.I8048
ushort ans = (ushort)(Reg16_d & 0xFF); ushort ans = (ushort)(Reg16_d & 0xFF);
// redo for aux carry flag
Reg16_d = Regs[dest] & 0xF;
Reg16_d += (Regs[src] & 0xF);
FlagAC = Reg16_d.Bit(4);
Regs[dest] = ans; Regs[dest] = ans;
} }
@ -122,14 +128,11 @@ namespace BizHawk.Emulation.Common.Components.I8048
a += 0x60; a += 0x60;
} }
// FlagAC is not reset, nor is FlagC reset
if (a > 0xFF) if (a > 0xFF)
{ {
FlagC = true; FlagC = true;
} }
else
{
FlagC = false;
}
Regs[src] = (byte)a; Regs[src] = (byte)a;
} }