It would be difficult to say for certain if that MAX232 design would work with my software. I've never messed with the MAX232 ICs, maybe if I had one to play with on the bench I could say for certain, but I would hate to point you guys in the wrong direction. If someone has one of these on hand, maybe they could try it?
Myself, I've only tested with a few different designs:
-The schematic on my page
-The CT-29 radio programming cable from http://www.rtsars.com, which is the same as the six-transistor design from here: http://home.comcast.net/~sllewd/pcware.htm
-The USB interface from http://www.TTL2USB.com
These are all the exact same circuits that are used with my radio programming software too, and I CAN say for sure that people have tried in the past to use the bare MAX232 design with the radios, and it hasn't worked without the additional inverting. But with the V1, I don't know for sure...
I'm planning on adding muting from software in the near future, probably utilizing the RTS or DTR line, so any interface will need modified for that as well.