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Re: strange problem with my oli M700

To: ralf@uni-koblenz.de
Subject: Re: strange problem with my oli M700
From: "William J. Earl" <wje@fir.engr.sgi.com>
Date: Thu, 29 Jan 1998 16:20:12 -0800
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>, linux-mips@fnet.fr, linux@cthulhu.engr.sgi.com
In-reply-to: <19980129221750.18001@uni-koblenz.de>
References: <19980129212705.29618@alpha.franken.de> <19980129221750.18001@uni-koblenz.de>
ralf@uni-koblenz.de writes:
 > On Thu, Jan 29, 1998 at 09:27:05PM +0100, Thomas Bogendoerfer wrote:
 > 
 > > I'm trying to read the firmware prom of my Olivetti M700 (Magnum 4000 
 > > clone).
 > > When access the address 0x9fc00000 (which is the KSEG0 address of the prom)
 > > the box freezes immidiately. Does anybody know why ? And how could I access
 > > the prom otherwise ?
 > 
 > Did you try uncached accesses via KSEG1?  I wouldn't wonder if the used
 > PROMs can't cope with the bursts generated for filling a cacheline.

     I am pretty certain that is the case for the Magnum.  That is, you
must use 0xbfc00000, not 0x9fc00000.

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