Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!ll-xn!mit-eddie!uw-beaver!tektronix!reed!kamath
From: kamath@reed.UUCP (Sean Kamath)
Newsgroups: comp.sys.apple
Subject: Re: ZIP Chip compatibility problems
Message-ID: <9800@reed.UUCP>
Date: 13 Jul 88 05:32:16 GMT
References: <3193@crash.cts.com>
Reply-To: kamath@reed.UUCP (Sean Kamath)
Organization: Reed College, Portland OR
Lines: 38

In article <3193@crash.cts.com> mkao@crash.CTS.COM (Mike Kao) writes:
>Zip Technologies really pisses me off. After waiting since the September,
>'87 AppleFest, I FINALLY received my 2 Zip chips. Guess what? It doesn't
>work properly with my computer! Let me explain the situation...

Don't gie them to much pain!  THey got caught, not being very experienced
with production and such.  ANd it might not be their fault at all.

>Both
>chips work fine on the //e at the store, but neither works correctly on mine.
>[short description of setup and problem]
>All of these "normal" //e features work fine on the newer //e equipped with
>the same chips. I have also taken EVERY peripheral out of my //e, even replaced
>my current Applied Engineering power supply with Apple's original -- all to
>no avail.
>
>Does anyone have any idea what might be wrong? Is anyone from Zip listening?

I doubt anyone at Zip is, but they might.

I had a very similar problem with a No-Slot clock.  I never did figure out
exactly why it didn't work in my original //e, and by the time I found out
about this, I had already done a full system swap with my newer one.  Seems
that on some //e's the MMU is flaky.  Oh, it works, but not exactly.  I had
a 65802 with the no-slot clock.  It didn't work.  Put in the 6502, and it
worked.  Worked with the '802 in the other //e (and still does.).  So, try
swapping MMU's.  I *think* they are the same on both computers, but it might
be best to get another 2-ROM //e's.  I think Open-Apple had a list of bad
part numbers for the MMU.  I'll check.

>                                                                  -- Mike Kao

Sean Kamath

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