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Re: R4600PC upgrade

To: Ulf Carlsson <>
Subject: Re: R4600PC upgrade
From: "William J. Earl" <>
Date: Thu, 8 Oct 1998 11:15:03 -0700
In-reply-to: <Pine.LNX.3.96.981008115329.995B-100000@calypso.saturn>
References: <Pine.LNX.3.96.981008115329.995B-100000@calypso.saturn>
Ulf Carlsson writes:
 > Hi,
 > I received a R4600PC today (thanks Lukas), and I happily went to my Indy
 > and plugged it in instead of my R4000SC. It failed on the diagnostics test
 > though. 
     If your machine is an early R4000SC machine, you may well need a new
PROM to go with the newer processor.  The final PROM, supplied with all
R5000 systems, works with all processors, but a given older PROM generally
does not work with newer processors.  The error message looks like the
result of using an obsolete PROM.

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