21MX proms (per request)

Sean Caron scaron at umich.edu
Mon Sep 7 12:47:50 CDT 2015

But I do think there's merit in Alexandre's general argument that one could
theoretically emulate the older bipolar PROMs with some mix of modern
components ... and the programmable device would be (a) more easily
obtainable than the old bipolar PROMs and (b) programmable with
inexpensive, contemporary USB device programmers which are definitely big



On Mon, Sep 7, 2015 at 1:24 PM, Al Kossow <aek at bitsavers.org> wrote:

> On 9/7/15 8:34 AM, Alexandre Souza wrote:
>> sometimes you gotta use flash
>> devices that are WAY faster than common EPROMs...
> and sometimes that won't work, because the hold time of fast
> devices is too short.

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