[sebhc] Re: Welcome & Bio

Patrick Rigney prigney at earthlink.net
Wed Mar 31 18:54:26 CST 2004

> Patrick wrote:
> > My bio: In Heath/Zenith, I currently own four H/Z-88/89/90's in
> > various configurations... My "reference" '89 (named "Smokey") has
> > the soft-sectored controller (thanks to help from Lee Hart)...
> Egads! I hope it didn't earn the name "Smokey" by letting any of the
> magic smoke out! :-)

It got out, but it's working so I think I was successful in putting it back.
:-)  It earned it's name on first power-up out of the box... three tantalums
blew immediately, two on the CPU board, one on the terminal logic board.

> > I've been collecting peripheral cards here and there, but have no
> > documentation for most of them...
> I have documentation for all the Heath cards, as well as the Magnolia
> #77316 floppy controller and #77318 128K memory board. Your timing was
> perfect, as I was just about to send it off to Jake Rubin tomorrow. Do
> you want me to make a copy of it before I do?

Lee, thank you, but I have originals, so I'm good shape, I think.  Are you
also sending Jack the Magnolia CP/M docs?  I have that on my desk to scan
for him, so you might save me an hour with my scanner. :-)

> You also need the Magnolia boot ROM and I/O decoder. I think I have both
> of these as well. Finally, you need Magnolia CP/M. I do not think I have
> any bootable Magnolia CP/M disks, but maybe someone out there does.

Boot ROM and decoder I have, although there is a question in my mind if the
boot ROM is the right version.  Oh, and by "boot ROM", I assume you mean the
EPROM normally occupied by MTR-88/89/90.  The other question is what
revisions or rework may be necessary to the '89 CPU board itself beyond the
EPROM/PROM replacements.  I remember pulling a gate and the decode PROM and
installing a daughter card that also had a connector to the 128K memory
card, but It's been a couple of months since I tried to get this working, so
rather than me handing out more sketchy details from my poor memory, I need
to go through the install process again so I can document/share exactly what
I've done and what the results are.

I have images of Magnolia boot disks from Don Maslin, but I have not been
able to test them as yet, and have no idea if they are somebody's working
disks or real distribution masters.

As always, thanks for your help, Lee!

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