James Merritt wrote:

> Here is a url for Poor Man's Packet that was popular about five or six
> years ago, a friend of mine built one and it worked just fine.

> http://ascension.cit.cornell.edu/pmp.html

  Thanks for the link.  I find PMP enigmatic.  As the source is supplied
(or I gather it is,) it is an excellent starting point for development
of packet radio firmware.  As this was asked for, it is a good and
appropriate answer.

  OTOH, as a means of operating packet radio, it is all but useless!
True, it works, but it does not do much, and by nature of its design,
cannot.  It came out just before BayCom, perhaps at the same time.
BayCom is interrupt driven, and though the source is proprietary, the
concept was elucidated and extended by others including Pawel Jalocha
(some of whose source is also available, and should be searched for)
into fully functional systems including NOS and BPQ drivers for BBSs.

  TFPCX is an alternative approach using a 3X baudrate interrupt clock
only.  It can't operate under a PC RTOS (Windoze?) but is reasonably
suitable for an embedded system.  No idea about sources though, except
that PMP can readily be adapted in this direction.

  Cheers,
        Paul B.