Processor Technology S100 memory boards

From: <(>
Date: Fri Dec 3 14:45:10 1999

> These 16K boards use 2147's don't they? Does your diagnostic (whatever it

Likely it uses 2114s (1kx4).

> is) tell you which bit is failing? If it can't read the bits, perhaps it's
> a (1) a failed decoder or (2) it's a failed data bus buffer, or (3) it's a
> roached address buffer. The only apparent alternative would be a failed
> RAM. It does smack of a failed on-board decoder, however, since only the
> one 4K block is failing. If you can't read/write even a single bit in that
> 4K block of RAM, it's undoubedly a buffer or a decoder. If only one bit
> fails, it's probably not a decoder, but then the RAM itself is suspect.

I don't ahve prints for those but memory says it's one of those that
allows block DESELECTs via switches or jumpers. That means the ram could
be good just not enabled.

Received on Fri Dec 03 1999 - 14:45:10 GMT

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