Differentiating chips (Was: Newbie member saying something!!!

From: Chuck McManis <cmcmanis_at_mcmanis.com>
Date: Fri Sep 10 15:11:18 1999

On Fri, 10 Sep 1999, Hans Franke wrote:
>> Well, check at startup the DX register - if DH is 3 it is a DX,
>> if 23 it's a SX (DL is the stepping).

At 12:54 PM 9/10/99 -0700, Fred wrote:
>And then the POST (Power On Self Test) IMMEDIATELY wipes it. It's easy to
>bypass some parts of the POST, but how do you suggest checking the value
>in that register before the computer has booted enough to even have video?

Could you jump into protected mode and out again (which forces a reset) and
pull the value out of DH then?

--Chuck
Received on Fri Sep 10 1999 - 15:11:18 BST