Open source, stand alone, ASCII terminal project

[Tony Duell]

> Just a thought, but there's nothing to stop you having RS232 line 
> drivers *and* receivers hooked to each pin, assuming you can make the 
> drivers float.  That way you can do your crossover patching in software ;-)

I cna't think of a common RS232 driver that has a 3-state output. 

However, a terminal should only need TxD and RxD (if it _requires_ 
hardware handshake, then it's not going to work with an awful lot of 
things that work with a real VT220). In which case all you need to be 
able to do is swap over those 2 pins, taking a simple DPDT switch. 
Sometimes a simple solution exists :-)

-tony