The rexxserdev.library was written to provide an easy to use interface between
ARexx programs and any Amiga serial device. The serial device will be opened as
shared so take care when accessing that serial device from more than one
application. All I/O requests to the serial device are synchronous not
asynchronous. Therefore, a call to a function will not return to the
application until that function is completed. Version 5.01 correct some bugs
from 5.0. Binary only, Author: Joseph M. Stivaletta