private void outx(bool IncHL)
{
OutPort(C.Value, HLM.Value);
dec(B);
if (IncHL)
{
HL.Inc();
}
else
{
HL.Dec();
}
// See http://www.z80.info/zip/z80-documented.pdf for weird flag behavior
int k = L.Value + HLM.Value;
if (k > 0xFF)
{
CF = true;
HF = true;
}
VF = P((k & 0x07) ^ B.Value) != 0;
}
private void inx(bool IncHL)
{
HLM.Value = InPort(C.Value);
dec(B);
NF = (HLM.Value & 0x80) != 0x00;
if (IncHL)
{
HL.Inc();
}
else
{
HL.Dec();
}
// See http://www.z80.info/zip/z80-documented.pdf for weird flag behavior
byte c = C.Value;
if (IncHL)
{
c++;
}
else
{
c--;
}
int k = c + HLM.Value;
if (k > 0xFF)
{
CF = true;
HF = true;
}
VF = P((k & 0x07) ^ B.Value) != 0;
}
private void cpi()
{
WZ.Inc();
cpx();
HL.Inc();
}
private void ldi()
{
ldx();
DE.Inc();
HL.Inc();
}