Path: utzoo!attcan!uunet!cs.utexas.edu!sdd.hp.com!mips!sgi!des@musashi.wpd.sgi.com
From: des@musashi.wpd.sgi.com (Des Young)
Newsgroups: comp.os.minix
Subject: Re: Will Minix run on a Sota286/i?
Summary: 266 Problems
Message-ID: <63377@sgi.sgi.com>
Date: 4 Jul 90 20:50:19 GMT
References: <3927@iitmax.IIT.EDU> <33185@ut-emx.UUCP>
Sender: des@musashi.wpd.sgi.com
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 19

In article <33185@ut-emx.UUCP>, petrilli@walt.cc.utexas.edu (Chris Petrilli) writes:
> In article <3927@iitmax.IIT.EDU> ed@iitmax.iit.edu (Ed Federmeyer) writes:
> >I have sucessfully upgraded Minix to 1.5.10, and would like to use the
> >'286' mode...  I have a PC/XT clone with a Sota 286/i "speedup" board.  So
> >far, when I run DOS "system checkers" they all think it is a 286...  but when
> >I try to run Minix in the '286' mode, it hangs.  (8088 mode works like a charm

Actually, I think your problem is that Minix uses the AT BIOS. It is used
for two things, one is extended memory transfers, while the other is to
switch into protected mode. The latter is the really essential one.
You need to look at the AT BIOS and insert the equivalent into the Minix
assembly library in the kernel. I was going to do it, but I run 32000
Minix now :-), so could not be bothered with a brain-dead 286 architecture.
(But, if you fix it I would like a copy :-))

Cheers, Des.


Des Young.	des@musashi