OSDev.org

Posted: **Sat Oct 24, 2009 11:54 am**

If a bit is "reserved" by Intel, does that mean you have to set it to zero in your OS, or does it mean you are not allowed to touch it.

Posted: **Sat Oct 24, 2009 1:59 pm**

When you are reading a value, changing it and writing it back, then "reserved" means "don't touch". Otherwise it means "put zeros here".

What is the meaning of reserved bits?