6800 processor systems (was: Re: BIE 4410)

From: Tothwolf <tothwolf_at_concentric.net>
Date: Thu Apr 18 21:24:30 2002

On Thu, 18 Apr 2002, Tony Duell wrote:

> > > Does the 'front panel' connect to the microprocessor's bus (in other
> > > words could it edit memory directly), or is it linked to I/O chips and is
> > > therefore entirely software driven? The second seems more likely, alas.
> >
> > (Again) It (appears to) connect to the 6821's.
>
> In which case, it's likely to be software-driven, and thus not a (true)
> frontpanel for the 6800 system. More likely to be controls for whatever
> machine this unit wwas once connected to.

All this talk about the 6800 lately has gotten me to pull out a pair of
6800 cpu cards I had that were once for a 1970s traffic signal system. I
stripped a bunch of parts off of them back in the early 90s, but strangely
enough, I still had about 95% of the parts. I'm getting ready to put them
back together, and wondered if anyone had ever seen any of these? These
two cards each use a 72 position card edge connector for everything, and
don't have any ROMs on board at all. Anyone have any suggestions as to
what to make from them? They have a 6800 and a 6850 on board, along with a
fair amount of 7400 series support logic. I'll take some pictures of them
once I clean the boards up some.

-Toth
Received on Thu Apr 18 2002 - 21:24:30 BST