Sun Oct 28 19:59:46 CET 2007

slave on krikit

Got one spewing 123, now need another one listening.

Slave uses RB0 (INT0). Apparently i can't pull the line all the way
down.. Probably on-resistance (i'm pulling down 100 ohm..)

Sequencing is an interplay between INT0 and the TMR2.

INT0 -> reset timer phase + call 'rtx-next'
TMR2 -> 'rtx-next'

The other one got 123, and some shifted version out of sync. To get
better sync during debugging, bytes could be interleaved with a 10 bit
idle preamble.  This would guarantee resynchronization after the first
faulty reception.