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Re: Apple II (rev1) instability...HELP!

Nama wrote:

On Apr 9, 2:57 pm, "Antony Mauget" <antony.mau...@capgemini.com>
wrote:


Hi Phil,



This issue maybe a little trickier to find, but for some reason I
suspect RAM, don't ask me why, it's just a gut feeling.


In that case, a simple trick can help you : swap RAM chips in rows C and E.
But based on the description, I don't think it's a RAM issue. Anyway, you
can give it a try before going further.

--
Antony
Apple II forever



Thanks for your thoughts Antony,
I did spend a few hours today swapping around RAM, and also swapping
out my Saturn 128k memory card for a standard language card. I'm not
sure exactly what chip was bad or weather it was a problem with the
128k card, but I seem to have fixed the issue. Fingers crossed that
the problem doesn't return.


With all the Apple ][ chips in sockets, it's all too common for contact
oxidation to lead to instability--particularly temperature-sensitive
instability.

Just removing and reseating chips is often all that it takes to get
back to stable operation.

-michael

NadaNet 3.1 for Apple II parallel computing!
Home page:  http://home.comcast.net/~mjmahon/

"The wastebasket is our most important design
tool--and it's seriously underused."