Ampro Littleboard problems..

From: Richard Erlacher <edick_at_idcomm.com>
Date: Thu Nov 29 09:44:52 2001

Though there are many "Little Board" products from Ampro, the ones I have, which
are the originals from back in '83 or so, will produce a prompt if you (1) have
no floppy attached, or (2) don't have a diskette in it. If it's not producing
that prompt, I'd say you need to look elsewhere than the floppy drive.

Aside from single-sided drives, I've never encountered a 48TPI drive that this
machine wouldn't boot once it's jumpered for DS0.

Nevertheless, if it's not producing the prompt, something's seriously wrong.
There aren't many parts that could be broken, but perhaps you should look into
which one it might be. My experience has been that if it doesn't produce that
prompt, it won't boot under any circumstances.

Dick

----- Original Message -----
From: "Gene Buckle" <geneb_at_deltasoft.com>
To: <classiccmp_at_classiccmp.org>
Sent: Thursday, November 29, 2001 8:58 AM
Subject: Re: Ampro Littleboard problems..


> > On Wed, 28 Nov 2001, Gene Buckle wrote:
> >
> > > I've got a Littleboard I'm tring to bring up. When I feed it a disk,
> > > and power it up, it will select the drive, spin it and shut down after
> > > about 3 to 5 seconds. I never hear a head step. Nothing shows up on the
> > > serial port (port a, 9600). The drive I'm using is a Teac FD-54B-02-U
> > > and the two jumpers are set to DS0 and IU.
> >
> > I presume that is a typo and it really is an FD-55B. Is it terminated?
> > I assume a straight cable since it is selected. The FD-55s that I use
> > are jumpered DS0 (for straight cable), HS, IU, and SM on the two main
> > jumper headers. PM is also jumpered on its own header.
> >
>
> Don, the number on the back of the drive really is FD-54B. As far as
> termination, I don't know. There is no place for what I would call a
> "traditional" floppy termination pack. There is a SIP resistor soldered
> into the board right ahead of the data connector. I don't have the drive
> in front of me now, but I don't recall seeing "SM" as being a jumper
> position. I do recall the "HS" labelling however.
>
> I don't recall anything marked "PM" at all.
>
> Thanks!
>
> g.
>
>
>
Received on Thu Nov 29 2001 - 09:44:52 GMT

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