It does seem like it might reduce parts count if we tapped the SB9600
> bus at a point where it's single ended. I haven't studied the
> schematic yet to see where / if that's possible.
Specifically, having now looked, single-ended versions of the /TX DATA
and RX DATA are available on the accessory connector next to the CPU.
Otherwise, based on the observed implementation in the radio, we'd need
an op-amp and supporting passives for receive, and two or three
transistors and supporting passives for transmit.
De
