TOPIC :  MDM712 MODEM PROGRAM INSTALLATION INFORMATION

FROM  :  IRVIN M. HOFF W6FFC

DATE  :  07/27/83


       This program is based on one originally written by Ward Christ-
ensen in September 1977.  It has since undergone a considerable number
of changes.  Recent changes include auto-dialing and continuous redial-
ing for the Hayes 300 or 1200 Smartmodem and the U. S. Robotics, along
with the standard PMMI 103 routines the program has long supported.  It
also handles up to two alternate long distance systems such as SPRINT,
ALLNET, MCI, (can be used to auto-dial TYMNET), etc.


NOTE:  Special configuration files are being added for specific types of
       computers.  A large number are already available (as shown below)
       and others are being added as interest escalates.  This file will
       be updated accordingly.

       To adapt this version to your equipment, you will want to get
some of the following programs:

              Program name          Purpose

               MDM712.ASM       (source code file)
               MDM712.COM       (object code file)
               MDM712.DOC       (how-to-use file)
               MDM712.INF       (information file)
               M712AC.ASM       (AppleCat II overlay file)
	       M712AL.ASM       (Altos Series 5 overlay file)
               M712AP.ASM       (Apple II overlay file)
               M712DP.ASM       (Datapoint 1560 overlay)  
               M712GP.ASM       (General purpose overlay)
               M712H8.ASM       (Heath/Zenith H89 file)
               M712HP.ASM       (Hewlett Packard 125 file)	
               M712HZ.ASM       (Heath/Zenith Z-100 file)
               M712I2.ASM       (Interfacer 3/4 overlay file)
               M712KP.ASM       (KayPro overlay file)
               M712MD.ASM       (Morrow MD overlay file)
               M712MM.ASM       (Morrow Multi I/O overlay file)
               M712NE.ASM       (NEC PC-8001 overlay file)
               M712NM.ASM       (Phone number overlay, ALD information)
               M712OS.ASM       (Osborne OS-1 overlay file)
               M712OT.ASM       (Otrona Attache overlay file)
               M712OX.ASM       (Osborne Executive overlay file)
               M712PM.ASM       (PMMI S-100 modem overlay)
               M712TV.ASM       (TeleVideo TS-802 overlay)
               M712XE.ASM       (Xerox 820 overlay file)
               M712ZB.ASM       (Telcon ZORBA overlay file)


       (The minimum would be any pair in one of the examples shown
below.)

       There are several ways by which you can set the proper ports,
status pin values, etc. for your equipment.


     1) Use your editor, ASM (or MAC)  MDM712.COM    and
        and DDT (or SID) with:         M712xx.ASM

               (712xx stands for an appropriate overlay)
                                                             or
     2) Use your editor, ASM (or MAC)  MDM712NASM


        One of those should appeal to you.  The program is designed to
work immediately for PMMI users with no changes - just use MDM712.COM.
(You might wish to change some of the available options, however.  It
is set to use base port 0C0H.)

        When ready to use the program, type 'H' (for 'HELP'), hit RET
and it will display helpful information on the commands.  There are so
many commands there are several pages.  You can abort the display with
a CTL-C.  (One of the most useful features being CTL-P to toggle your
printer on/off.)  You can also type a question mark (?) which shows the
current parameters.

        The program has received numerous worthwhile optional features
in the past several months.


SUPPLEMENTAL INFORMATION OF INTEREST:

        When adapting the program to your equipment, this table might be
helpful:

        (A typical port number will be shown for each.)

                             PMMI UART   8251     2661     8250

PORT    (control or status)     0C0H     29H      0EDH    0D8H+5
BAUDRP  (baud rate port)       PORT+2    ---      ---      ---
MODCTL1 (control or status)     PORT     PORT     PORT     PORT
MODCTL2 (2nd control port)     PORT+3    ---      ---      ---
MODDATP (data port)            PORT+1   PORT-1   PORT-1   PORT-5 
MODRCVB (receive bit)           02H      02H      02H      01H
MODRCVR (receive ready)         02H      02H      02H      01H
MODSNDB (send buffer empty bit) 01H      01H      01H      20H
MODSNDR (send ready)            01H      01H      01H      20H

        (1  For a PMMI board with UART for a typical S-100 computer)
        (2  For a non-PMMI computer using a 8251A to external modem)
        (3  For a Heath/Zenith Z-100 computer using the 2661B I/O
        (4  For a Heath/Zenith Z-19 or Z-89 using the 8250 I/O

  (3  For a Heath/Zenith Z-100 c