18 Apr
2002
18 Apr
'02
5:24 p.m.
On Thu, 18 Apr 2002, Tony Duell wrote:
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
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.