EM64T supported?
Dan Nelson
dnelson at allantgroup.com
Thu Nov 17 20:27:41 GMT 2005
In the last episode (Nov 17), Chuck Swiger said:
> Marc G. Fournier wrote:
> >First off, what is it? On 32bit platforms, to address >4G of RAM, I
> >recall that there is some sort of 'paging' that has to be done to
> >address it ... does EM64T get around that somehow, or is this just
> >another name for it?
>
> EM64T uses 64-bit wide registers and addressing, and can talk to >4GB
> of RAM natively. Older processors may still support >4GB of physical
> RAM using the PSE/PSE-36 CPU extensions, but are still using 32-bit
> registers.
PAE/PAE36, right? Note that if you enable PAE, some drivers may not be
available. See the PAE kernel config file for a list.
--
Dan Nelson
dnelson at allantgroup.com
More information about the freebsd-questions
mailing list