Date   : Wed, 11 Sep 1985 06:16:00 MDT
From   : Keith Petersen <W8SDZ@SIMTEL20.ARPA>
Subject: Info(S-100) on Seattle 16K Plus,PMMI MM-103 program

Kevin, the MM103 modem cannot be used at the usual port C0h when used
with a Horizon.  Reason: the mother board uses that address for other
purposes, usually for RAM parity control.  Most people change the
MM103 to port D0h or B0h.

There are overlays for MEX and MODM700 for using the PMMI.  They are
complete with dialing routines.

--Keith