21MX proms (per request)
jwest at classiccmp.org
Sun Sep 6 14:00:58 CDT 2015
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.
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?
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.
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