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Date:      Wed, 12 Aug 1998 22:36:14 -0500 (CDT)
From:      Jeffrey Dunitz <orpheus@lemieux.hockey.net>
To:        Doug White <dwhite@resnet.uoregon.edu>
Cc:        Jacob Barde <bardejd@clarkson.edu>, freebsd-questions@FreeBSD.ORG
Subject:   Re: IBM PS/x (MCA) arch.
Message-ID:  <Pine.LNX.3.96.980812223028.26559F-100000@lemieux.hockey.net>
In-Reply-To: <Pine.BSF.4.00.9808120019050.28795-100000@resnet.uoregon.edu>

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On Wed, 12 Aug 1998, Doug White wrote:

> 
> On Mon, 10 Aug 1998, Jacob Barde wrote:
> 
> > Presently I am looking to install a unix-clone OS on an 486 IBM
> > PS/ValuePoint.  Now, I already know that FreeBSD does not support it right
> > now.  
> > I was wondering if anyone knew of any free (or nearly free) unix-like OSs
> > that did support the MCA that IBM used.  Linux (Redhat5.1) already bit the
> > dust.
> > 
> > appreciate it,
> 
> I highly doubt it.  IBM watned money for the MCA spec and no open OS was
> going to pay money for it.  Besides, that is legacy hardware and MCA is
> dead.

MCA is hardly dead. Unless I'm mistaken, there are still current RS/6000 
MCA boards--graphics, net, scsi, etc...
 
Anyway, the best source I can point anyone to about MCA linux is:
http://www.net/~calemon/linux.html

Which has several links to other pages.
 
I've never tried to run it, though I've always wanted to get a souped-up
PS/2 55sx or something and try it. 
 
As I understand it, a lot of MCA cards look the same to the
system as certain ISA cards--that is, there is an MCA version of the
WD8013 ethernet card, and it's software-compatible, lives in the same
memory addresses, etc. There's an MCA version of the 1542 SCSI card, 
the sound blaster, and a number of other common cards. These are supported
more or less natively. There are small hacks to the kernel that were done
to make MCA card initialization/but arbitration work right or something.
 
Seems like hacking this into freebsd wouldn't be a big deal. No, I'm not
going to try it. :)

Sorry this was sorta off-topic, but I found it interesting. I think MCA is
kinda cool.



> 
> Doug White                              | University of Oregon  
> Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
> http://gladstone.uoregon.edu/~dwhite    | Computer Science Major
> 
> 
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Jeffrey Dunitz                 | Current Job:         | orpheus@avalon.net
BOFH Emeritus, Avalon Networks | Information Services |      Iowa City, IA 
http://www.avalon.net/~orpheus | Cray Research/SGI    |     (319) 339-8268


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