[sebhc] Z-37 Diag Disk

Barry Watzman Watzman at neo.rr.com
Sun Mar 20 16:25:33 CST 2005

Almost has to be a data separator problem.  Your communication to the FDC
chip over the bus is good, it's hard to think of anything other than the
data separator.

-----Original Message-----
From: sebhc-bounces at sebhc.org [mailto:sebhc-bounces at sebhc.org] On Behalf Of
Lee Hart
Sent: Sunday, March 20, 2005 6:56 PM
To: sebhc at sebhc.org
Subject: Re: [sebhc] Z-37 Diag Disk

Dan Lanciani wrote:
> |Background: For many months now I've been trying to get a Z89-37 board
> |working for Mark. I have a perfect Zenith board; except it doesn't work.
> |I've changed every single IC, and checked the remaining discretes as
> |thoroughly as I can, and it *still* doesn't work.
> What are the symptoms?

I can select the drives, control the motors, head load, etc. But when I
tell it to read, I see the data coming off the disk but the disk
controller won't output it to the bus.
"Never doubt that the work of a small group of thoughtful, committed
citizens can change the world. Indeed, it's the only thing that ever
has!" -- Margaret Mead
Lee A. Hart  814 8th Ave N  Sartell MN 56377  leeahart_at_earthlink.net

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