Re: Any IIe hardware hackers?

Hello.

I can burn you a new PAL for the IIe or email you the JEDEC file if you want
to burn one yourself.

Just email me or post a message here and let me know what you'd like to do.
I may even have an IOU and MMU if you really want some extras.


Henry S. Courbis
www.GSE-Reactive.com
Apple II Series Legacy Hardware - Come take a look at what we have to offer!

"nonmaskable" <mikedl@xxxxxxxxxxx> wrote in message
news:1139272957.035141.151460@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi. I'm trying to repair a IIe mainboard. This is my first time
working with an Apple IIe, and the custom PAL, IOU, and MMU make fault
tracing difficult for me since I don't have any known good substitues.
From looking with a scope, it looks as if the PAL is getting the main
three clock inputs (14M, 7M, and 3.5M) fine, but not putting out VID7M.
Am I right in assuming that this means that the PAL is bad, or is
there another failure (e.g. the PAL control signals) that could explain
it? Since replacement PALs aren't around it would mean the end of the
mainboard.

Thanks!




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