#: 9445 S7/Telecommunications
    08-Feb-91  21:08:14
Sb: #9443-#terminal blues
Fm: GENE TURNBOW 72457,220
To: Bob van der Poel 76510,2203 (X)

I've seen this problem many, many times, and not just with OS-9 machines,
either.  The problem is your cable.  If you're able to transmit characters in
one direction, your hardware otherwise is probably fine.  Probably what needs
to be done is to tie all the handshaking lines high on both ends of the cable. 
You'll have to find a document that tells you what pins those are, but I've had
good success with one where pins 4 & 5 are jumpered together, and also pins 6,
8 & 20 jumpered together but separate from 4 & 5. Pin 2 goes to pin 3 on the
opposite end; pin 3 goes to pin 2 on the opposite end.  Pin 7 is ground and
goes straight through to pin 7 on the other end.

This should work.  I have found very few terminal devices on which a cable
configured this way wouldn't work.

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