Date   : Wed, 29 Mar 2006 22:27:21 +0200
From   : Eelco Huininga <eelco@...>
Subject: Re: Model B NMI PITA.

Fragula wrote:
> The DFDC Mk1. was different, though *probably* the IRQ stuff was the
> same. The Mk2, which is what I have here, is register/software etc.
> compatible, and simply plugs into the 8271 socket. Oh there is one
> flying wire, but thats to allow it to bypass some drive I/O stuff that
> is built into the 1770.
I've got the Mk1, and I worked out the schematics a long time ago. You wouldn't
happen to have the Mk2 schematics, do you? It would be nice to see what the
differences between the two are :-)

Cheers,
Eelco