a2aviator{at}gmail.com wrote:
> Does this Zip Chip have the SRAMs showing underneath?

Yes.

> Either way, it's just a hybrid- you may be experiencing a poor solder
> joint on one of the leads. You could try digging into the material on
> the underside- some of them were silicone seal like where you could
> peel it back. Reflow the solder on all the leads. They are leads stuck
> to the side of a ceramic similar to how the 30 pin SIPs had leads
> stuck onto SIMMs.

Mine is potted in what appears to be black epoxy.  And, yes, it sure acts like 
one of the leads is broken off internally.  My guess would be RST*.  It's 
probably not coincidence that it starts when rocked down on the opposite side 
from that pin.  Also the computer ignores OA-Ctrl-Reset, treating it like a 
simple Ctrl-Reset.

Before I take a Dremel bit to the underside, I'd like to have a clearer idea 
of what's in there.  Does anyone have a picture of an unpotted ZipChip?

Steve
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