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Correct a few small mistakes in the Z80 emulation.

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon 2019-02-21 01:10:17 +00:00
parent c7feb58815
commit c0aa7c5ff5
1 changed files with 5 additions and 5 deletions
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10
Z80/Z80.cs
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@ -1833,7 +1833,7 @@ namespace EightBit
this.HL2().High = this.MEMPTR().High;
}
private void BlockCompare(Register16 source, Register16 counter)
private void BlockCompare(Register16 source, ref Register16 counter)
{
var value = this.Bus.Read(source);
var result = (byte)(this.A() - value);
@ -1852,7 +1852,7 @@ namespace EightBit
private void CPI()
{
this.BlockCompare(this.HL()++, this.BC());
this.BlockCompare(this.HL()++, ref this.BC());
++this.MEMPTR();
}
@ -1864,7 +1864,7 @@ namespace EightBit
private void CPD()
{
this.BlockCompare(this.HL()--, this.BC());
this.BlockCompare(this.HL()--, ref this.BC());
--this.MEMPTR();
}
@ -1904,7 +1904,7 @@ namespace EightBit
private bool LDDR()
{
this.LDD();
return (this.F() & (byte)StatusBits.PF) == 0; // See LDD
return (this.F() & (byte)StatusBits.PF) != 0; // See LDD
}
private void BlockIn(Register16 source, Register16 destination)
@ -2010,7 +2010,7 @@ namespace EightBit
var memory = this.Bus.Read();
this.Bus.Write((byte)(PromoteNibble(memory) | LowNibble(this.A())));
this.A() = (byte)(HigherNibble(this.A()) | HighNibble(memory));
AdjustSZPXY(this.F(), this.A());
F() = AdjustSZPXY(this.F(), this.A());
this.F() = ClearFlag(this.F(), StatusBits.NF | StatusBits.HC);
}