OSDev.org

Posted: **Sun Jan 21, 2007 10:31 pm**

Hi ,
I am trying to access the memory above 4 GB using IA32 PSE 36 bit Paging mechanism. I am doing this in MS DOS.

Can i do paging using Fat Mode? Any one have idea on this

Posted: **Mon Jan 22, 2007 11:13 am**

no. you can only use paging in PROTECTED MODE, not in any other mode. Not in any tweaked mode

Posted: **Tue Jan 23, 2007 1:22 am**

Hi all,

Is it possible to switching between real mode & protected mode in Tiny Model. When i tried to do this system restarts. what is the cause of the problem.

Siva

Posted: **Tue Jan 23, 2007 4:34 am**

with 99% probability: a reboot during protected mode = programming error.

Double-check your code, IDT, GDT, make sure interrupts are disabled, and read the Intel Manuals

OSDev.org

PSE 36 Bit Memory access above 4GB in FlatMode

PSE 36 Bit Memory access above 4GB in FlatMode

TINY Model in Protected Mode