DEP and hardware

[Neil W.]

How do I tell if I have a processor that supports hardware level DEP (Data
Execution Protection)? Do all Pentium 4s have it? If so, how do I turn it
on at the hardware level?

Thanks for any tips.

- Neil

 

[Brian Cryer]

How do I tell if I have a processor that supports hardware level DEP (Data
Execution Protection)? Do all Pentium 4s have it? If so, how do I turn
it
on at the hardware level?

Thanks for any tips.

- Neil

Neil, if you've not already seen it, take a look at
http://support.microsoft.com/kb/875352

Towards the bottom of the page it gives instructions on how to configure
whether or not it is enabled.

Hope this helps.

 

[Sparda]

How do I tell if I have a processor that supports hardware
level DEP (Data
Execution Protection)? Do all Pentium 4s have it? If so, how
do I turn it
on at the hardware level?

Thanks for any tips.

- Neil

You mean that thing that stops code execution in the section of the
memory that is supposed to be for holding data and not code execution
(also knowen as buffer over flow)? If yes, then it isnt the CPU that
supports this, it’s generaly the motherboard, so no CPU’s
(effectivly) support this, how ever botherboards do.

EXAMPLE:
http://www.msi.com.tw/program/products/mainboard/mbd/pro_mbd_detail.php?UID=639

Notice how it says "NOTE: Because of the limitations of chipset, this
MB does not support 98/ME.", I am lead to belive this refers to that
the motherboard has this protection, and hence canot run win98 (or
lower) becasue win98 actualy runs in the protected section of the
memory.

 

[Brian Cryer]

You mean that thing that stops code execution in the section of the
memory that is supposed to be for holding data and not code execution
(also knowen as buffer over flow)? If yes, then it isnt the CPU that
supports this, itâ?Ts generaly the motherboard, so no CPUâ?Ts
(effectivly) support this, how ever botherboards do.

EXAMPLE:
http://www.msi.com.tw/program/products/mainboard/mbd/pro_mbd_detail.php?UID=639

Notice how it says "NOTE: Because of the limitations of chipset, this
MB does not support 98/ME.", I am lead to belive this refers to that
the motherboard has this protection, and hence canot run win98 (or
lower) becasue win98 actualy runs in the protected section of the
memory.

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Interesting. DEP IS a feature of the CPU. The chipset might have a role to
play but I've not come across any articles that would indicate this to be
the case. Given that the chipset seems to have a role in everything, I could
believe it has a role in DEP.