gonkulator

From: A.R. Duell <ard12_at_eng.cam.ac.uk>
Date: Thu May 8 16:39:01 1997

[HP9100's]
> If you ever get a chance, try to determine the specifications for
> the "clock track" on the card. My analysis of the circuitry led

Uh-Oh... _Another_ project goes on the list....

Which reminds me. Where (in the UK, preferably) can you buy Magnasee,
either as a spray-on stuff, or as one of those little bubble magnifiers? I
would like to obtain some for various repair/preservation jobs.

> me to believe that one of the tracks was pre-formatted at the
> factory and used as the clock for reading and writing operations.

What do you know about the circuitry. I think you're right, BTW, based on
the info in the manual and the appropriate HP journal, but I wondered what
else you knew.

In fact, I think it's one clock track in each direction.

I suspect the HP65/67 cards also have a clock track on them. I'm pretty
sure the HP71 ones do.

> I'm pretty sure I could make a card formatter if I just had one
> working card to study.

Should be possible.

> Tim.


--
-tony
ard12_at_eng.cam.ac.uk
The gates in my computer are AND,OR and NOT, not Bill
Received on Thu May 08 1997 - 16:39:01 BST

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