Date   : Mon, 13 Mar 2006 13:53:07 +0000
From   : Fragula <fragula@...>
Subject: Re: Warning: Sad case on list!

David Harper wrote:

> Much as I respect Robin, he didn't get things quite right in his
> description of the 80186's Tube operation.
> 
> The 80186 co-pro is wired unusually. It doesn't use parasite NMIs for
> data transfer at all. The line that would be connected to the NMI pin
> for other processors actually is connected to control one of the DMAs
> integral in the 80186. The NMI has quite a different function.

Thanks. Handy to know.. I've had NMI "issues" before (Model B Iss.7
White, with 2 FDCs and ADLC on the NMI already.)

ISTR solving it involved removing the board and cutting tracks n stuff.
(Twas PJB that did the thinking bit tho!) Wish I'd documented that.

> I will put some info about this on the web in a day or so.

Nice.. I'll look forward to that.

Cheers!

Mark.