Path: utzoo!attcan!uunet!motcid!king
From: king@cell.mot.COM (Steven King)
Newsgroups: comp.sys.amiga.hardware
Subject: A501/GVP Impact A500 incompatibilities?
Message-ID: <1339@grape3.UUCP>
Date: 20 Feb 90 18:45:15 GMT
Organization: Motorola Inc. - Cellular Infrastructure Div., Arlington Heights, IL 60004
Lines: 27

Has anyone heard of incompatibilities between the GVP Impact A500 memory
expansion and the true-blue (well... :-) Commodore 501 memory/clock expansion
for the 500?  Here's the problem...

I bought the 501 with my system back in June.  No problems.  I bought the
GVP hard drive (the newer one, that lets you add up to 4Meg RAM) a couple
months ago.  No problems.  This week I bought 2Meg of RAM and installed it
in the GVP.  No problems.  For a day, anyway.  The next day I booted (fine)
and tried to load an application.  Guru city!  I cycled power and tried it
again.  Same thing.  Afraid I'd somehow munged the hard drive, I tried doing
other things like opening up directories.  I could get two directories deep
and whammo!  This is a sporadic thing, sometimes I can boot and it works 
without a hitch.

Bad SIMMs, right?  I thought so too, but on a hunch I pulled the 501 expansion
out of the system.  No problems!  With the 501 out of the loop I haven't
had any problems booting or running whatever I need.  With the GVP out of
the loop and the 501 back in I also haven't had any problems.

Any guesses as to what's going on here?  Has anyone seen or heard of this
happening before?

-- 
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If there's a byte of data in the computer but no   | Steve King  (708) 991-8056
pointer is pointing to it, then it isn't really    |   ...uunet!motcid!king
there.                                             |   ...ddsw1!palnet!stevek