Lpc2000

>> Ho, hum - bit-bang a few GPIO lines on the LPC. It works fine
for us. We use a 38400 Hz interrupt on FIQ to reduce jitter, and
a state machine to run the protocol. It's been tested with three
bit-banged UARTs.

If we can do this in high-level Forth without a line of
assembler, the C-weenies ought to be able to cope ... <<

I'd do it in assembler - I'm not afraid of getting down and dirty, but 
the application is just too real-time to be messing around with bit bashing.