1771 floppy controller questions

From: Richard Erlacher <edick_at_idcomm.com>
Date: Tue Nov 20 09:10:25 2001

OK ... I can believe you'd reach that conclusion from what you describe. I've
done that on one of those "late nights" on more than one occasion. It's
reasonable to assume the part is toast, given that there are several supplies,
each of which has been applied to the wrong pins. Too bad ...

Dick
----- Original Message -----
From: "Tothwolf" <tothwolf_at_concentric.net>
To: <classiccmp_at_classiccmp.org>
Sent: Tuesday, November 20, 2001 2:25 AM
Subject: Re: 1771 floppy controller questions


> On Tue, 20 Nov 2001, Richard Erlacher wrote:
> > From: "Tothwolf" <tothwolf_at_concentric.net>
> > > On Mon, 19 Nov 2001, Michael Holley wrote:
> > > > From: "Tothwolf" <tothwolf_at_concentric.net>
> > > >
> > > > > I have a complete TRS-80 Model I that has a dead Western Digital
FD1771-01
> > > > > chip in its expansion interface. Does anyone know if a National
1771-B01
> > > > > is a suitable replacement? What would be a fair/reasonable price for a
new
> > > > > 1771 these days?
> > > >
> > > > B. G. Micro, www.bgmicro.com, has FD1771s for $4.95.
> > >
> > > Thanks for the info. I should be able to get my local vendor to match that
> > > price since B.G. Micro is a fairly well known vendor.
> >
> > What is it that makes you believe that the 1771 s the problem?
>
> Well, I accidentally plugged the chip in backward when troubleshooting the
> floppy interface right after I got it. It turned out that the floppy
> ribbon was bad, just due to age I guess. I don't think the chip let out
> its magic smoke, but it certainly does not work now ;)
>
> -Toth
>
>
Received on Tue Nov 20 2001 - 09:10:25 GMT