@socketwench Hopefully this makes sense: the thing I worked out is that the Wifi card uses one of the 2 UARTs on the Serial card on pins exposed over the bus. The wifi card doesn't have its own UART
At one point, I had the ESP-Link firmware on the Wifi card and set the jumper to use UART 1 - that let me telnet into the RC2014 instead of using an FTDI serial cable
Later, I flashed zimodem firmware to the ESP8266 and set the wifi jumper to UART 2 - that let me use a serial cable on UART 1 and telnet out to a BBS on UART 2
The tricky thing is only one thing can really use a UART at a time - i.e. can't use an FTDI cable and wifi card at the same time on UART 1