public static int LdR16(Opcode op, GbMemory mem)
{
if (op.Src == 8)
{
mem.WriteCycle((op.Dest == 2 || op.Dest == 3) ? mem.R.Hl : mem.R.GetR16Sp(op.Dest), mem.R.A);
}
else
{
mem.R.A = mem.ReadCycle((op.Src == 2 || op.Src == 3) ? mem.R.Hl : mem.R.GetR16Sp(op.Src));
}
if (op.Src == 2 || op.Dest == 2)
{
mem.R.Hl++;
}
else if (op.Src == 3 || op.Dest == 3)
{
mem.R.Hl--;
}
else
{
// Do nothing.
}
return(2);
}
public static int LdH(Opcode op, GbMemory mem)
{
if (op.Dest == 7)
{
mem.R.A = mem.ReadCycle(new GbUInt16(0xFF, mem.ReadCycleI8()));
}
else
{
mem.WriteCycle(new GbUInt16(0xFF, mem.ReadCycleI8()), mem.R.A);
}
return(3);
}
public static int LdA16(Opcode op, GbMemory mem)
{
byte low = mem.ReadCycleI8();
byte high = mem.ReadCycleI8();
if (op.Dest == 7)
{
mem.R.A = mem.ReadCycle(new GbUInt16(high, low));
}
else
{
mem.WriteCycle(new GbUInt16(high, low), mem.R.A);
}
return(4);
}