private static function cbopcode2(Core $core)
{
$core->FCarry = ($core->registerD & 0x80) == 0x80;
$core->registerD = ($core->registerD << 1 & 0xff) + ($core->FCarry ? 1 : 0);
$core->FHalfCarry = $core->FSubtract = false;
$core->FZero = $core->registerD == 0;
}