Hi Todd,

also Jays solution sounds nice.
To let pass a message, the interrupt handler must only do:
mov sbuf, sbuf

Maybe you need no additional transceiver chips, since the connections are short (only from 1 device to the next).

The main disadvantage, any interruption of the chain stops all communication.
A solution can be, use a head phone plug with switch. So, if devices are removed, the switch close the chain again.


Peter