*BSD News Article 45467


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Newsgroups: comp.unix.bsd.netbsd.misc
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From: philip@cs.vu.nl (Philip Homburg)
Subject: Re: x86 install problem.
Nntp-Posting-Host: centaur.cs.vu.nl
References: <3ra0lp$4ck@reuters2.mitre.org> <3rclca$jft@decaxp.harvard.edu> <3rhp7u$qs9@reuters2.mitre.org>
Sender: news@cs.vu.nl
Organization: Fac. Wiskunde & Informatica, VU, Amsterdam
Date: Tue, 13 Jun 1995 11:17:36 GMT
Message-ID: <DA3zDD.153.0.-s@cs.vu.nl>
Lines: 29

In article <3rhp7u$qs9@reuters2.mitre.org>,
Dean Cookson <dcookson@mitre.org> wrote:
%In article <3rclca$jft@decaxp.harvard.edu>,
%Aaron Brown <abrown@fas.harvard.edu> wrote:
%>The Thinkpad 720 uses an internal MicroChannel architecture for its bus.
%
%Ah ha!  This I did not realize.
%
%>From what I understand, none of the free UNIX's (including NetBSD) support
%>microchannel machines. This is probably where the problem lies.
%
%Yup, that would do it then, wouldn't it.

As far as I know, Minix runs on some MicroChannel machines. Minix contains
only a very small amount of code that deals with the MicroChannel (most of
this code is related to the level triggered interrupts). It might be possible
to port this to *BSD.

About a year ago I tried Minix-386vm on some Thinkpad 7xx (I don't know
the exact model), and Minix thought it was running on a PS/2 with a
MicroChannel but it turned out that the machine had a regular ISA bus!






						Philip Homburg