MDS CDC Disk Drive Documentation

[xyz]

Good News,

I traced the signals back to the index pulse driving a flipflop.   The pulse
was not large enough to trigger the FF so I cleaned and peaked the sensor's
output.   The drive now becomes ready and seeks.

Bad News,

The drives still want boot from the floppy, but I am closer
Bob
----- Original Message ----- 
From: "Randy McLaughlin" <cctalk at randy482.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Monday, June 06, 2005 11:50 AM
Subject: Re: MDS CDC Disk Drive Documentation


> From: "Randy McLaughlin" <cctalk at randy482.com>
> Sent: Monday, June 06, 2005 10:06 AM
>
>
> > From: "xyz" <rsnats at bellsouth.net>
> > Sent: Monday, June 06, 2005 6:21 AM
> >
> >> Thanks Randy.
> >>
> >> Themanual at the web site is for a 9404-B. It has a lot of helpful
> >> information, but the printed circuit board is more modern.   I have
> >> traced
> >> out some of the circuitry and it appears the even the pinouts from the
50
> >> pin connector do not match those of the 9404-B.  That surprised me.
> >>
> >> Bob
> > <snip>
> >
> > I've got a paper manual from the Radio Shack model II technical manual
but
> > I bet it's also for the -B.
> >
> > I'll look and let you know.
> >
> > Sorry I assumed Al had what you needed.
> >
> > If you find the right manual please pass it on to Al or myself.
> >
> > Randy
> > www.s100-manuals.com
>
> My hardcopy is also a -B.
>
>
> Randy
>
>
>