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Re: [N8VEM-S100:6365] A V3 version of our S100 bus System Monitor Board

Presume that the Heathkit PAM is like the Morrow Keyed-Up 8080?  (e.g., see: https://archive.org/details/bitsavers_morrowsche77_699793).  Depends on ROM+CPU for keypad support.  The idea here is CPU-independence, which would be the way to go.  But as John notes (later) probably will take a new board to accommodate the necessary circuitry -- the functionality isn't all *that* complicated, but it's still non-trivial to substitute for that CPU+ROM and "simple program".

Perhaps we could treat the keypad-function as a self-contained pendant (thus gaining space off-S100-board), but then one needs to deal with a lot of data/address long-lines that need to be buffered close to the backplane.  Could replace the long-lines with a serial protocol with shift registers at both ends?  Getting complicated ...

On Thu, Feb 19, 2015 at 7:59 PM, Richard Cini <rich...@verizon.net> wrote:
How about like the Heathkit PAM or 11/34a ODT. Not sure if the PAM used another CPU. The 11/34 used a 4004 but I'm sure there are other methods. 

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