*** SHAREWARE DOCUMENTATION ***


         The Personal Communications Library for the C Language (  PCL4C  )
         is an asynchronous communications library designed for experienced
         software   developers   programming  in  C.   Five  compilers  are
         supported: Microsoft Optimizing C, Microsoft Quick C,  Borland  C,
         Turbo  C,  and  MIX Power C.  An IBM PC/XT/AT or compatible or IBM
         PS/2 is required.  The Personal Communications Library takes  less
         than 6K bytes and features:

          o  SMALL, COMPACT, MEDIUM & LARGE memory models.
          o  37 communication and support functions.
          o  Interrupt driven receiver & (optionally) transmitter.
          o  Supports high performance 16550 UART.
          o  Supports the PC/4 and PC/8 DigiBoard.
          o  Supports the BB1004, BB1008, and BB2016 BOCA boards.
          o  Hardware (RTS/CTS) flow control.
          o  300 baud to 115,200 baud.
          o  COM1 through COM16 defined.
          o  Adjustable receive queues from 8 bytes to 32 KB.
          o  Control-BREAK error exit.
          o  18 communication error conditions trapped.
          o  4 ports can run concurrently (more with multiport boards).
          o  Complete modem control & status.
          o  Written in assembly language for small size & high speed.

         Two example programs ( source code ) are provided along  with  the
         small and large model library makefiles.

         (1)  SIMPLE  is an extremely simple terminal emulator program.  It
         is provided as the smallest and easiest to understand  example  of
         communications programming using PCL4C.

         (2)  TERM  is  a  more  capable terminal emulator than SIMPLE.  It
         functions as a dumb terminal emulator but can exchange files using
         XMODEM (Standard XMODEM, XMODEM-CRC, and XMODEM-1K  )  and  YMODEM
         (Standard  and  YMODEM-G) communication protocols.  TERM will also
         send an initialization string to your Hayes compatible modem.

         The shareware distribution includes the  small  and  large  memory
         model  libraries  PCL4C_S.LIB  and PCL4C_L.LIB and the small model
         MIX library PCL_S.MIX.  All example source code is included.

         For more information, refer to the Personal Communications Library
         Users Manual ( PCL4C.USR )  and  Personal  Communications  Library
         Reference Manual ( PCL4C.REF ).

         A  Turbo Pascal version of the library ( PCL4P ) is also available
         but which does not have as many example programs.


                        *** Registration ***


         The shareware version  of  PCL4C  is  provided  so  that  you  may
         personally  determine  the usefulness of the product for yourself.
         If you wish to register PCL4C, please send $65  plus  $3  S&H  ($6
         outside of North America) to:

                MarshallSoft Computing, Inc.
                Post Office Box  4543
                Huntsville AL 35815

                Voice  205-881-4630
                FAX    205-881-4630
                BBS    205-880-9748

         We accept  American  Express  (account  number,  expiration  date,
         exact  name  on  your  card,  and  complete  AmEx  billing address
         required), checks in US dollars  drawn  on  a  US  bank,  purchase
         orders  (POs)  from  recognized US schools and companies listed in
         Dun &  Bradstreet,  and  COD  (street  address  and  phone  number
         required)  within  the USA (plus a $3 COD charge).  Print the file
         PCL4C.INV if an invoice is needed.

         You can also order PCL4C from The Public  Software  Library  (PSL)
         with your MC, Visa, AmEx, or Discover card by calling 800-242-4PSL
         (from  overseas:  713-524-6394)  or  by  FAX at 713-524-6398 or by
         CompuServe at [71355,470].  The product number for PCL4C is 10908.

         If  you  wish  to  update from an older version of PCL4C, send $15
         plus $3 S&H ($6  outside  of  North  America).   Updates  must  be
         ordered directly from MarshallSoft Computing.

         The registered package includes:

         o  Small,Compact,Medium, & Large libs w/o shareware screens.
         o  Assembler source code for the library.
         o  Laser printed Users and Reference Manuals.
         o  Telephone, FAX, and BBS support for one year.
         o  EXAMPORT  -- Free utility which displays a detailed  formatted
            report  for  any serial port.  For example, to display a report
            for COM1, type "EXAMPORT 1".

         Print the file PCL4C.INV if an invoice is needed.  The  registered
         user  will  receive the latest version of PCL4C shipped by two day
         priority mail (packet airmail  overseas).   A  5.25"  diskette  is
         provided unless a 3.5" diskette is requested.

         PCL4C.ASM  is  the source code for the library. The source code is
         copyrighted by MarshallSoft Computing, Inc. The user is granted  a
         license  to use the PCL4C object code in his own application only.
         PCL4C.ASM is not shareware and may not be sold or  given  away  to
         anyone.

         The  registered  user  will receive the latest version of PCL4C by
         return mail.  A 5.25" diskette is provided unless a 3.5"  diskette
         is requested.