17 Apr
2002
17 Apr
'02
11:31 a.m.
It's been spoken for a few times over. Now I wish I had a couple of
them.
-- Pat
17 Apr
17 Apr
2:24 p.m.
On Wed, 17 Apr 2002 pat(a)cart-server.purdueriots.com wrote:
It's been spoken for a few times over. Now I
wish I had a couple of
them.
It's a nice little machine that looks like it was produced in low volumes.
It could be a very very nice homebrew or even a kit, but it's hard to tell
without looking at the boards and such. Based just on appearances and the
particular power supply it uses, I guessed it was made around 1978-1983.
Without looking at it closer, I'd also have to guess that it was made for
a lab or some other small business application instead of the hobbyist or
home market.
I hope whoever ends up with it takes care of it and realizes just what a
treasure this machine really is.
-Toth
7:15 p.m.
On Wed, Apr 17, 2002 at 02:24:28PM -0500, Tothwolf wrote:
Certainly the front panel has more features than you usually find
(assuming they control the CPU and not some other piece of hardware).
I still haven't figured out what some of the buttons might do.
-- Derek
On Wed, 17 Apr 2002 pat(a)cart-server.purdueriots.com
wrote:
It's been
spoken for a few times over. Now I wish I had a couple of
them.
It's a nice little machine that looks like it was produced in low volumes.
8:33 p.m.
On Wed, 17 Apr 2002, Derek Peschel wrote:
On Wed, Apr 17, 2002 at 02:24:28PM -0500, Tothwolf
wrote:
Certainly the front panel has more features than you usually find
(assuming they control the CPU and not some other piece of hardware).
I still haven't figured out what some of the buttons might do.
I've been wondering what that port on the rear of the system is for. It
could be for nearly anything, but the only way to find out is to trace it
out down to the board level.
-Toth
On Wed, 17 Apr 2002
pat(a)cart-server.purdueriots.com wrote:
It's
been spoken for a few times over. Now I wish I had a couple of
them.
It's a nice little machine that looks like it was produced in low volumes.
10 p.m.
On Wed, 17 Apr 2002, Tothwolf wrote:
I've been wondering what that port on the rear of
the system is for. It
could be for nearly anything, but the only way to find out is to trace it
out down to the board level.
From what I can tell, it's a digital I or O port.
It connects to three
cards (which also connect to the 24 LEDs and toggle switches on
the front
panel) which each have a 6821 and a few transistors on them, so I'd guess
it's for output.
-- Pat
10:23 p.m.
On Wed, Apr 17, 2002 at 08:33:37PM -0500, Tothwolf wrote:
Certainly the front panel has more features than you usually find
(assuming they control the CPU and not some other piece of hardware).
I still haven't figured out what some of the buttons might do.
I've been wondering what that port on the rear of the system is for. It
could be for nearly anything, but the only way to find out is to trace it
out down to the board level.
Some of the front-panel functions (e.g., JOG) sounded like they might
control something else. Maybe even a VCR? So that's why I wrote
"(assuming they control the CPU and not some other piece of hardware)",
and maybe the port has something to do with that.
-- Derek
On Wed, 17 Apr 2002, Derek Peschel wrote:
> On Wed, Apr 17, 2002 at 02:24:28PM -0500, Tothwolf wrote:
> > On Wed, 17 Apr 2002 pat(a)cart-server.purdueriots.com wrote:
It's been
spoken for a few times over. Now I wish I had a couple of
them.
It's a nice little machine that looks like it was produced in low volumes. 
18 Apr
18 Apr
1:34 p.m.
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5:08 p.m.
On Thu, 18 Apr 2002, Tony Duell wrote:
(Again) It (appears to) connect to the 6821's.
-- Pat
Some of the
front-panel functions (e.g., JOG) sounded like they might
control something else. Maybe even a VCR? So that's why I wrote
The term 'jog' is also used with reference to machine tools, which might
be a more reasonable thing for this computer to control.
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.
5:33 p.m.
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9:24 p.m.
New subject: 6800 processor systems (was: Re: BIE 4410)
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.
8303
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9 comments
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participants (4)
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ard＠p850ug1.demon.co.uk -
dpeschel＠eskimo.com -
pat＠cart-server.purdueriots.com -
tothwolf＠concentric.net