public FlagSet(byte[] input)
{
// A constructor that can set ZF, SF, PF to what they are defined as in most cases
Carry = FlagState.UNDEFINED;
Auxiliary = FlagState.UNDEFINED;
Overflow = FlagState.UNDEFINED;
Direction = FlagState.UNDEFINED;
Interrupt = FlagState.UNDEFINED;
// ZF is set if $input is equal to zero.
Zero = input.IsZero() ? FlagState.ON : FlagState.OFF;
// SF is set if $input has a negative sign in twos compliment form.
Sign = input.IsNegative() ? FlagState.ON : FlagState.OFF;
// PF is set if the number of bits on in the first byte of $input is even.
// e,g
// input[0] == 0b0000 ; PF
// input[0] == 0b1000 ; NO PF
// input[0] == 0b1010 ; PF
Parity = Bitwise.GetParity(input[0]) ? FlagState.ON : FlagState.OFF;
}