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Date   : Fri, 11 Nov 1988 14:24:18 GMT
From   : cadnetix.COM!cadnetix!rusty@uunet.uu.net (Rusty)
Subject: Jade S-100

(Mike, mail got to gatech, and gatech refused to send it any further.
the next hop was supposed to be to jade!morris)

In article <11042@elroy.Jpl.Nasa.Gov> morris@jade.UUCP (Mike Morris) writes:
>
>I've got a IMSAI S-100 box, with a Jade "BIG-Z" Z-80 CPU card, and a Jade
>"Double-D" disk controller, rev. C.  

Exactly my config.

>                     I picked up a rev B card in surplus,
>and it doesn't seem to work.  Before I go trying to borrow a good scope
>and/or a logic analyzer (both would require calling in past favors) does
>anybody know if the s/w I have on my rev C. will work, or do I have to start
>hacking (again...) ?

I have the 'manual' for that card somewhere, and I remember that there were
some mods to change a rev B board to a rev C board.  Email me a good path,
(and your phone number, just in case) and I will email back the
particulars.

>
>Lastly, there are times that I can't get the mess to boot.  If I pull the
>extra boards out (Semidisk, Godbout Interfacer 4 (triple serial & Centronics))
>to a bare minimum (CPU, 64k Godbout RAM 17, floppy controller) it boots ok.  I
>can then shut it down, plug in the other cards, power it up, and reboot with
>no problems.  Any ideas?

All I can say is, I have never had that problem with my setup (64k ram board,
Big z, Jade DD disk, 8" SA850 drives, VDB (video display board), 3 ramdisk
boards from that digital place in Texas, and a 2P+S (or 4P+S?) 
serial/parallel board - i.e.  a pretty full system).  I assume that a
Semidisk is a ramdisk?  Is it battery backed up?  If so, and the backup
voltage is getting onto the bus somehow, that could make it not reset.
...I think.

>I have a Morrow "Switchboard" for sale, with docs.

Huh? whats that?  (just curious)

>  - I know that some of the stuff mentioned above is old and
>not worth much, but when you've got lemons...  

Well, I am keeping my s100 partly because it is not worth selling it,
and partly because I have some nifty I/O boards I want to play with,
and partly because it is handy to have a spare computer around which has
3 serial ports and 2 parallel ports, and which has a low cost so you are
not as afraid of blowing it up!

>   Mike Morris .............morris@Jade.JPL.NASA.gov  ..... WA6ILQ
                                    ^^^^ gatech does not like you, jade.

Boy, this ended up a lot longer than I had expected.  Mike, lets see
if we can get email to work!
-----
Rusty Carruth   UUCP: {uunet,boulder}!cadnetix!rusty  DOMAIN: rusty@cadnetix.com
Cadnetix Corp.  (303) 444-8075x296 \  5775 Flatiron Pkwy. \ Boulder, Co 80301
Radio: N7IKQ    'home': P.O.B. 461 \  Lafayette, CO 80026

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