On 5/22/2017 8:41 PM, Ethan Dicks via cctalk wrote:
Do you have a "traffic light"? I find them invaluable for diagnosing
handshaking and TxD/RxD swaps.
Yep. constant low on TX.
What worked was a serial port on a desktop. The first try.
It's entirely possible, but I put a scope on the TX line, and I see no
activity at all with the unit in DATA or TERM READY mode. The DATA LED
blinks, so I think I need to signal the Model 43 that it is "connected".
As has been suggested, I joined GreenKeys and asked if someone has a
similar setup that works, so I can replicate.
Worst case is that the driver board has issues, which at least will
narrow down my search.
Jim
