// Push and Pop
private void POPAF()
{
AF = Pop().AND(0xFFF0).OR(AF.AND(0x000F));
} // PopAF retains bottom 4 of F
// Push and Pop
private void POPAF()
{
AF = Pop().AND(0xFFF0).OR(AF.AND(0x000F));
} // PopAF retains bottom 4 of F
