software that goes with a B&C Microsystems Inc. UP100 Universal RS232 E(E)PROM/Micro Programmer.

If this is some modern unit with a single-chip microcontroller, you are probably out of luck. If not, if it's vintage enough to have a microprocessor and some ROM and some RAM: 1) confirm the unit is "RS-232" or serial. Many of them used a PC parallel port. YOu'll have to reverse engineer the circuits at the DB25 (or DB9) connector. 2) If it's really serial, chances are it can be operated with a serial terminal (or PC running a comm program). You may have to guess at the baud rates, it may be autobaud, using the first character received to determine a baud rate. "Hit return a lot.". If it's PC parallel, you are mostly out of luck. But there's still: 3) if all that fails, Pull the PROM out of the unit - chances are it has one - and dump it. Of course you'll need an EPROM reader, once, to do this. Also note the processor in the unit. You may need to disassemble the code, at least a little. But it may be informative even as an ASCII dump. - Um, this is the kind of thing done, lots of time in the past, to make sense of some unknown microcomputer. Is this "lost art" now? Puzzled, Herb Johnson -- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net