Re: PFG Lisa

From: Dr. Helmut Post <helmut_post_at_email.domain.hidden>
Date: Thu, 13 Oct 2005 14:19:10 +0200

Hi Phil, Hi Tom!

> As far as I know, the black wire is Ground
> (I'm shure)
> and the red one is frequency output
> (I'm not so shure, I only remember by brain) and I used that last time
> more than a decade ago ...
> It was used to get a synch. signal to an external unit. e.g. a widget
> drive or an frequency generator or an external time base in a AC
> AD-converter.

This answer is incorrect!
The PFG is a special device which attaches to the main part of the Lisa's disk controller and is able to better "simulate" a real Mac Floppy controller chip found in a "real" Mac Plus. The frequency is software controlled by MacWorks II plus to read and write even bad written Mac GCR coded Floppies.

Greetings from Helmut / Bavaria

>
> Do you have an Oscilloscope?
> Plug it in and check, what you see on the screen.
> or
> an frequency counter on a Digital Multimeter
>
> greetings TOM from Bavaria
>
>
> Am 13.10.2005 um 00:31 schrieb Philip Lord:
>
> > Hi Again,
> > I just got a "programable Frequency Generator'. Unfortunately I do not
> > have the manual.
> >
> > Can anyone tell me where the red and black wires go to?
> >
> > Much thanks
> >
> > Phil
>
>
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Received on 2005-10-13 05:31:30