csquared3 at tx.rr.com
Mon Feb 1 21:37:40 CST 2010
> Pete Turnbull wrote:
>> On 01/02/2010 05:37, CSquared wrote:
>>> Pete Turnbull wrote:
>>>> I am really puzzled by this. The ACIA has no hardware reset line, but
>>>> it's very easy to send it a master reset command in software.
>>> I'm pretty sure they were Motorola parts. As I told Geoffrey, it has
>>> been a very long time - like probably 40 years - and I've forgotten a
>>> lot of the details, and just sort of remember the pain. I think the
>>> ACIA would somehow get into a state where it would not pay attention
>>> to the master reset command.
>> I don't recall that ever happening to me, but I can well believe it :-)
> Intel parks I can see, Motorola parts no!
I really like Motorola stuff too, but ISTR the 6850 package was pin
limited and there was no room for a discrete reset line. Y'all are
going to force me to see what I can dig up on that old project yet. :)
It's been so long though, and since I think the project was scuttled, I
really doubt I have any documentation of any kind left. Maybe some of
my old REI friends remember more about it than I seem to, though I think
I've lost touch with the other folks who worked on that system.
Of course I could get myself a 6809 system, connect a 6850 and figure
out how to lock it up. Hey, what a great idea...
More information about the cctech