Hacking the DECmate serial port

[Tony Duell]

> > Has anybody done it or is it possible to up the speed to at least 9600?
> > Is this a hardware or firmware limitation?
> 
> Since the 6402 will easily handle speeds over 4800, I _think_ the
> limitation is how fast the CPU can emulate a VT100, not how fast can
> the UART accept characters, so given your choices, I'd say it's a
> firmware limitation.

Not necesarily. The 6402 takes external transmit and receive clocks, at 
16 times the desirted baud rate. If the clock generator hardware can't go 
faster than 16*4800 for some reason, then you won't get more than 4800 
baud. This is probalby very easy to modify, though.

-tony