8 Sep
2002
8 Sep
'02
12:37 p.m.
Joe -
Ahh, that makes sense -- thanks for the info. It sounds kind of cool, but
I don't think I'll have much use for it so it's yours for the cost of
shipping if you'd like.
I'll box it up and drop you a note with the total.
-- Tony
At 05:49 PM 9/8/2002 +0000, you wrote:
Tony,
I've seen stuff like that for logic analyzers. They're just small
scale computers and are used to teach/demonstrate how to use a logic
analyzer. I have instructions for one here somewhere (from Gould I
think). I don't have the device but the docs show the schematic and
contain the listing of the EPROM on it and it's VERY simple. You can
make it "run" a short program that's in EPROM and you use that to
demonstrate how to setup the LA to trigger when certain data appears and
also set to trigger on the Nth appearance of certain data. The EPROM also
has some sections with all 0s and alternating 1s and 0s and that's used
for some other demo but I don't recall exactly what they were for.
The BNC connector on your's is almost certainly to supply 5 VDC for a
HP logic probe. HP built all (or some) of their probes to get power from
a BNC connector and included the BNC power point on many of their instruments.
"reset", "cnt up", "cnt
dn", "clear" and "stop".
Sounds like the SW on the board just has a simple counter
program. Reset the CPU so that it restarts at address 0. Make it count
up or down, clear the counter without resetting and stop the counter.
If you don't need it. I'd like to play with it.
Joe
At 01:27 PM 9/8/02 -0400, you wrote:
I recently picked one of these up. It's a
flat panel with a pair of
boards, one marked 8080 and the other marked 6800. Both boards have ZIF
processor sockets (the one on the 8080 board is empty). There's a set of
four seven-segment LEDs on the 6800 board. The panel includes a pair of
toggle switches (run/hold below the 8080 board, run/reset below the
6800) There's a bnc plug marked 'logic probe' and a set of switches marked
"reset", "cnt up", "cnt
dn", "clear" and "stop".
>
>Does anyone have any idea what it's for?
>
>-- Tony
>
>