H89 CP/M hard-secored boot diskette

From: Patrick Rigney <patrick_at_evocative.com>
Date: Thu Apr 3 19:12:00 2003

> I have, of course, dumps of the 2 proms (one is 32*8, the other 256*4) in
> my Z90. They're a lot less 'unobtainium' than many chips I deal with!.

That's good news, because I have a few CPU boards I'd like to upgrade... so,
modern equivalent blanks are available? I haven't ripped labels off of any
of them to see what they really are.

> > Tony, out of curiousity, what are your versions of the various PROMs and
> > EPROMs at U516, 517, 518, and 520 on your Z90?
> That would involve getting to the Z90, which is not going to be
> trivial....

LOL! Sure, just curious. I want to confirm my suspicions that this '89 I'm
using has been upgraded to the equivalent of your '90, but I'll take it on
faith. If I can get that soft-sectored controller going, then it's
equivalent enough for me. But hey, wasn't this the thread where two days
ago, everyone was talking about how easy it was to open cases and build
cables? ;-)

Received on Thu Apr 03 2003 - 19:12:00 BST

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