On 06/27/2016 05:34 AM, Paul Koning wrote:
How high was "too high"? The RS232 standard rules for allowed output voltages are surprisingly lenient (3 to 15 volts, positive or negative for space and mark respectively).
Mark (not space) was around +3V, ha :-) I have no idea how the VT52 was making sense of that, but it was, quite reliably.
--FritzM.
