15 Feb
2008
15 Feb
'08
5:37 a.m.
On Thu, Feb 14, 2008 at 11:47:34PM -0600, Michael B. Brutman wrote:
The protocol is explained on the referenced
'codeninja' page, but I
never got my samples of the 6094 to talk. They seem to function in
stand-alone mode (lights will change when a key is pressed), but nothing
ever comes across the serial connection to a PC.
I've tried a variety of cables, breakout boxes, multimeters, etc. I'd
love it if somebody else tried and tell me what I am doing wrong.
Even if we get the lot to distribute amongst list members (I'm in!),
I wouldn't be able to lay my hands on one until October. In the meantime,
for the one that you have now, have you tried a serial analyzer like
an HP4951? They sit between a computer and a modem/terminal, or between
any two devices, and can snoop traffic in both directions. You also
have the ability, as a standalone device, to program a limited amount
of protocol traffic, enough so that we were able to simulate the BIND
for an SNA session, and keep the PU Type 2 device on the far end thinking
it was still connected to a PU Type 4. That was the max we could do -
there wasn't enough programmable memory to allow a real session, but it
does illustrate the point.
You could also try an oscilloscope - for a single key press (no repeat?),
a storage scope might work better, or a real logic analyzer - to capture
the bit stream, just to see it.
Those are the sorts of tools _I_ use when I'm snooping strange serial
streams. Dunno what you have on hand.
-ethan
--
Ethan Dicks, A-333-S Current South Pole Weather at 15-Feb-2008 at 13:30 Z
South Pole Station
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Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html