GameBoy\Cbopcode::cbopcode23 PHP Method

    private static function cbopcode23(Core $core)
    {
        $newFCarry = ($core->registerA & 0x80) == 0x80;
        $core->registerA = ($core->registerA << 1 & 0xff) + ($core->FCarry ? 1 : 0);
        $core->FCarry = $newFCarry;
        $core->FHalfCarry = $core->FSubtract = false;
        $core->FZero = $core->registerA == 0x0;
    }