private static function cbopcode25(Core $core)
{
$newFCarry = ($core->registerC & 0x1) == 0x1;
$core->registerC = ($core->FCarry ? 0x80 : 0) + ($core->registerC >> 1);
$core->FCarry = $newFCarry;
$core->FHalfCarry = $core->FSubtract = false;
$core->FZero = $core->registerC == 0;
}