>         I just bought at $70 from radio shack, an oscilloscope
> that attaches to a PC. It's more a heavy duty graphical logic
> probe than a true oscilloscope but for simple timing or waveform
> viewing it works like a charm. It also is poortable with a tiny
> LCD display. Woth every penny I'd say.

One thing I've been wondering about, but not had time to test with mine: is
the RS232 ground the same as the probe ground, or was Radio Shack kind enough
to opto-isolate the thing (which is surprisingly easy if the PC sets DTR and
CTS to opposite states)?