sodb
So, have you any progress?
P.S. Just soldered my TTL-RS232 converter for my -Deluxe. I used RS-232/RJ-45 pinout to save space, so both serials or serial and 2 additional USB ports can fit between Ethernet ports and external antenna.
RTS/CTS and DTR/DSR lines are shortened to work as a NULL-modem, so hardware flow control can be used on the terminal side.
First time I forgot to solder ground to V+/V- charge pump capacitors, so many symbols was damaged . I was thinking that 0.1mF capacitors is not enough, but finally that's ok