21MX proms (per request)

Alexandre Souza alexandre.tabajara at gmail.com
Sun Sep 6 16:00:00 CDT 2015

Jay, no one is pin compatible, I always make adapters. But at least I make
it work :D

2015-09-06 16:00 GMT-03:00 Jay West <jwest at classiccmp.org>:

> Alexander wrote...
> -----
> Intersting to note: many times i have used eproms in place of these proms.
> Usually, flash parts are faster, so better suited to the task.
> -----
> Loader roms:
> You may be able to get by with that on loader roms. I've never found
> eproms that were functional & pin compatible. What ones did you use for the
> 1K variety?
> Microcode:
> I doubt seriously the eproms would be stable for microcode. HP specs 5ns
> speed parts for the microcode; what eproms work and can hit those speeds? I
> suspect this is one of those "might seem to work" but is a really bad idea.
> J

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