Thanks, Dave, for the answer.

> A slightly more difficult change would be to add an optional primitive for
> Unix/Linux that sets the serialPortBaseName string. That would let you control
> it from Squeak, and would not require any changes to the existing primitives.

That's actually probably what I'll try to do. Stupid question, but
where can I fetch the sqUnixSerial.c file (and it's MacOS
counterpart)?

Severin