Re: Identifying Processors

Article View: alt.lang.asm

Article #117

#117

From: Morten Welinder
Date: Mon, 23 Nov 1992 12:27

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denis.giroux@freddy.ersys.edmonton.ab.ca (Denis Giroux)  writes:

>TO: all

>I have a question for the assembler gurus out there. Is there an easy way to
>distinguish a 286 processor from a 386, and a 386 from a 486?

Get the program Infoplus and study the source. It is available from 
simtel20 and garbo.

In short: It is easy in *real* mode, impossible in protected mode (which
includes virtual-8086-mode).

Don't flame me for this; think it over instead. The 486 manual gives
states that all the flag-handling instructions may trap in protected
mode. Also the BSwap instructions (etc.) may be emulated on a 386.
Interrupts cannot be stopped so timing is unrealiable. 

A 486DX can be distinguished from a 386 by checking the type of 
co-processor. A RapidCad would show as 486, though (I think!).

-- 
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Signature file under construction -- Drive carefully, please!
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                               Morten Welinder, terra@diku.dk

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Message-ID: <1992Nov23.122703.12623@odin.diku.dk>

Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sunic!dkuug!diku!terra

References: <98.749.uupcb@freddy.ersys.edmonton.ab.ca>

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Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sunic!dkuug!diku!terra
From: terra@diku.dk (Morten Welinder)
Newsgroups: alt.lang.asm
Subject: Re: Identifying Processors
Message-ID: <1992Nov23.122703.12623@odin.diku.dk>
Date: 23 Nov 92 12:27:03 GMT
References: <98.749.uupcb@freddy.ersys.edmonton.ab.ca>
Sender: terra@rimfaxe.diku.dk
Organization: Department of Computer Science, U of Copenhagen
Lines: 26

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