If you mean Atron then yes I've heard of them.
if fact, I was just
 searching for info on them this morning. I have two full length IBM PC
 style cards that are both marked "Atron", one plugs into an 8 bit ISA slot
 and the other plugs into a 16-bit ISA slot. The cards have a ribbon cable
 that connects them together at the top. One is marked "Master Break Trace"
 and the other is marked "Slave Break Trace". (looks like they're for an
 emulator). Both boards have a large male 3U type connector on the outside. 
This looks like a later version of the Atron Debugger I used in
a Zenith Z-150 (I still have the Zenith). It had its own debugger
software, it plugged into an available slot, had a ribbon cable
that plugged into the 8088, and a place to put the 8088 you removed
 from the CPU board (the 8088 was on a separate CPU
board in the 
Zenith).
I'll have to go bug my former employer (15 year ago) and see
if he still has it and wants to let go of it, along with perhaps
the Zilog REO Development System and the IMSAI 8080 he had...).
-dq