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       ----------------------- MEX Overla� HEL� ------------------------
        Writte� by� Ki� Levit�                        10/05/8�  5:43 PM
       -----------------------------------------------------------------

       INTRODUCTION:

       Thi� fil� document� th� variou� ME� overlay� (a� containe� i� th� �
       accompanyin� MEX-OVLB.LB� file� an� describe� th� differen� type� �
       o� overlay� an� explain� ho� the� ar� "linked� int� � MEX.CO� �
       fil� (usin� MLOAD� t� creat� you� installe� versio� o� MEX.COM.

       Th� overlay� describe� belo� shoul� wor� correctl� wit� MEX�� bu� �
       no� al� o� the� ar� guarantee� t� wor� withou� som� possibl� �
       "tweaking" for your particular system.

       There are three basic types of overlays:

            Mode� boar� overlays�� Thes� ar� fo� "modems� o� � boar� �
       whic� plu� int� a� S-100�� Appl� o� IB� slo� (usually� o� othe� �
       system� whic� hav� interna� modem� whic� connec� th� compute� �
       directly to the phone lines with no other intervening hardware.

            Seria� por� overlays�� Thes� ar� fo� system� whic� hav� a� �
       RS-232à (o� equivalent� seria� por� t� whic� a� externa� mode� �
       mus� b� connecte� befor� th� connectio� t� th� phon� line�� Thi� �
       typ� include� plug-i� seria� board� a� wel� a� "UARTS� o� single-�
       boar� computer� (suc� a� th� Kaypr� o� Morrow).

            Externa� mode� overlays�� Thi� typ� o� overla�� usuall� �
       support� onl� th� DIA� and/o� DISCONNEC� function� whic� canno� �
       b� handle� b� th� seria� por� directly� I� mos� case� (especially�
       wit� "Smar� modems"� i� use� th� seria� por� I/Ϡ function� t� �
       sen� "commands� t� th� modem�� Thes� overlay� canno� wor� withou� �
       the appropriate accompanying serial port overlay.

       �� fourt� typ� o� overla� combine� th� seria� por� an� externa� �
       mode� cod� int� on� overla� (suc� a� th� KP4� an� EPQؠ overlays� �
       whic� make� i� eas�� i� yo� happe� t� us� th� sam� typ� o� �
       externa� mode� o� th� sam� system� bu� i� no� a� "layered� a� th� �
       seperat� overla� method�� Th� on� reaso� t� combin� overlay� i� �
       thi� wa� i� s� th� "SET� comman� ca� d� modem-specifi� actions� �
       bu� � ne� "SSET� comman� i� availabl� (a� o� MEX-111� whic� wil� �
       eventuall� mak� thi� reaso� a� invali� one�

       Sinc� th� distinctio� betwee� mode� board�� seria� por� an� �
       combine� seria� port/externa� mode� overlay� i� � bi� fuzzy�� � �
       hav� onl�� chose� t� identif� th� "Externa� Modem�� overlay� �
       separatel� fro� th� othe� overlays�� Al� o� th� "Externa� Modem� �
       overlay� liste� belo�� wil� wor� wit� an� o� th� seria� por� �
       overlay� whic� en� befor� 0B00H� bu� AL� o� the� REQUIR� � seria� �
       port overlay in order to work.






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       OVERLAY DESCRIPTIONS:

       T� sav� spac� an� eliminat� redundancy�� al� th� overlay� ar� �
       liste� belo� usin� onl� th� las� fou� character� o� th� filename� �
       Al� ME� overlay� ar� name� wit� th� forma� MXO-????.AQM�� Thes� �
       description� wer� take� fro� th� sourc� cod� listing� an� ma� no� �
       b� totall� accurate�� bu� shoul� a� leas� giv� yo� a� ide� whic� �
       overlay is most likely to work for your system.

       Modem board, serial port & serial port/external modem overlays:

            AC01 -- AppleCat ][ modem board (Novation)
            AP12 -- Apple ][ serial boards (CCS/SSM/Apple/etc.)
            DP10 -- Datapoint 1560
            DV10 -- Davidge DSB04/6 single board computer
            EP10 -- Epson QX-10
            EPQX -- Epson QX-10 + SmartModem compat. external modem
            GB10 -- Compupro Interfacer 3/4, SS1 serial boards (S-100)
            H811 -- Heath/Zenith H89
            HZ11 -- Heath/Zenith 100
            II11 -- Intersystems VIO (2651 PCI) w/ H/Z-19/29/49 term.
            K484 -- Kaypro 4-84/2x/4x (internal modem)
            KP1� -- Kaypr� (Z8� SIO� (for us� w/externa� mode� overlays)
            KP41 -- Kaypro + internal or external (Hayes SM-compatible)
            KPS2 -- Kaypro + external modem (Hayes SM-compatible)
            LO11 -- Lobo MAX-80
            MD11 -- Morrow Micro Decision (MD2/MD3)
            MM10 -- Morrow Multi-I/O board (S-100 serial board)
            MR10 -- Morrow Micro Decision hard disk (MD11)
            NE10 -- NEC PC-8001
            NS10 -- North Star Horizon
            OA10 -- Otrona Attache
            OC10 -- Osborne 1 w/ Comm-Pac modem
            OS02 -- Osborne 1 (see MXO-OS02.FIX file)
            OSEX -- Osborne Executive
            PM11 -- PMMI modem board (S-100)
            PP10 -- Pied Piper
            R210 -- TRS-80 Model II
            SB10 -- Intertec Superbrain
            TV10 -- Televideo TS-802
            US11 -- U.S. Robotics modem board (S-100)
            XE10 -- Xerox 820/820-II
            ZB11 -- Telecon Zorba

       Externa� mode� overlay� (MUS� b� use� wit� seria� por� overlay):

            CT10 -- CTS Companion
            DT10 -- Datec 212
            PR10 -- Penril/Rixon 300/1200 AD
            RT10 -- Racal-Vadic VA3451
            RV12 -- Racal-Vadic VA212
            SC10 -- SmartCat 212 (Novation)
            SM13 -- Smartmodem (Hayes and compatibles)
            VP10 -- Ventel MD212


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       "LINKING" MEX & OVERLAYS:

       1� Determin� th� necessar� overlay(s� fo� you� system/modem�� (I� �
       non� o� th� overlay� see� t� b� appropriate�� yo� ma�� hav� t� �
       writ� you� own�� ge� on� o� tw� existin� overlay� fo� � guid� an� �
       adap� i� a� neede� usin� a� existin� mode� overla�� o� progra� �
       which already runs on your system as a guide.)

       2�� Onc� yo� hav� determine� th� appropriat� overla� t� utilize� �
       yo�� shoul� mak� sur� yo� hav� � recen� cop� o� MEX.COM� (lates� �
       versio� a� o� th� 10/5/8� thi� wa� writte� wa� MEX112.COM�� an� �
       it� associate� MEXPAT.AQ� file� (MEXPAT11.AQ� wit� MEX111/MEX112� �
       B� sur� t� ge� th� MEX11DOC.TQ� an� MEX11DOC.W� file� whic� mak� �
       u� th� manua� fo� MEX�� You'l� als� nee� MEX.HQ� an� MLOAD21.CQ� �
       (o� curren� version�� an� you� selecte� overla�� file�� (NOTE� �
       Uninstalle� MEؠ sometime� wil� hav� � ".BIN�� fil� typ� (fo� �
       binary) to differentiate it from an installed .COM file.)

       3�� Unsqueez� th� MEXPA� an� overla� file� (usin� US� o� NSWP)� �
       Als� unsqueez� MLOAD21.CQ� an� ME� itsel� i� squeeze� (som� ME� �
       version� ar� release� a� .CQ� files)�� Unsqueez� MEX.HQ� t� ge� �
       MEX.HLP while you're at it.. (And the MEX11DOC files too.)

       4� Edi� overlay(s)�� selectin� an� necessar� options�� "tweak� a� �
       needed for your system. (You may have to "experiment".)

       5) Edit MEXPAT file to select default STAT and other MEX options.

       6�� Us� AS͠ o� MA� t� assembl� th� overla�� an� MEXPAԠ files� �
       giving .HEX files (do NOT "LOAD" these to make .COM files!).

       7�  Us� MLOA� t� loa� th� overlay(s� an� MEXPA� fil� a� show� i� �
       the examples below:

            MLOAD MEX.COM=MEX111.BIN,MXO-GB10,MXO-SM13,MEXPAT11
            (installs MEX for Interfacer 3/4 serial board w/Smartmodem)

            MLOAD MEX.COM=MEX112.COM,MXO-KP41,MEXPAT11
            (installs MEX for Kaypro w/Smartmodem or internal modem)

       NOTE�� Th� orde� o� th� inpu� file� (one� t� th� righ� o� th� "=� �
       equa� sign� i� important�� Th� uninstalle� ME� fil� mus� b� firs� �
       (an� shoul� includ� th� .COM/.BIΠ extension�� an� shoul� b� �
       followe� b� th� mode� board/seria� por� overla� an� (i� � seria� �
       por� wit� � supporte� externa� modem� th� externa� mode� overlay� �
       wit� th� "MEXPATCH� fil� last�� (I� you� overla�� contain� bot� �
       seria� por� an� mode� contro� code�� yo� nee� i� an� th� MEXPATC� �
       file only.)

       8� I� yo� enabl� th� INI.ME� function�� edi� � INI.ME� fil� (wit� �
       your favorite editor) with your desired initialization commands.

       9� I� al� wen� well� yo� shoul� hav� � workin� versio� o� MEX.CO� �
       an� yo� ca� the� rea� th� manua� an� us� HEL� (i� MEX� fo� mor� �
       info on how to set up your PHONE list, etc. Happy modeming!! �

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       IN SUMMARY:

            Ge� ye� files�� edi� th� overlays�� MLOA� 'e� an� go� Sound� �
       easy�� an� i� usuall� is�� bu� don'� ge� discourage� i� yo� hav� �
       trouble. Hope this file will help make the job easier...

                                     -- Kim Levitt  10/5/84  5:43 PM
                                        MBBS HQ RCP/M (213) 653-6398
                                        (300/1200 24 hrs.)















































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