AIOESPCA.NLM Version 2.00


                       Hayes Microcomputer Products, Inc.
                               P.O. Box 105203
                             Atlanta, GA. 30348

         TEL: (404) 441-1617      BBS: (800) 874-2937 (800) US-HAYES
         FAX: (404) 449-0087      BBS: (404) 446-6336 (404) HI-MODEM

             Copyright (C) 1993 Hayes Microcomputer Products, Inc
                            All rights reserved.

                            (September 1, 1993)

        This driver allows AIO applications to use the serial ports 
        on a Hayes ESP Communications Accelerator installed in the server.

        Each board requires its own interrupt, which is allocated to the
        first port, or Master Port.  Additional ports (Slave Ports) share
        the interrupt, unless specifically assigned an exclusive interrupt
        using the "slavex=" parameter.

        Interrupts (hex) 3, 4, 5, 7, 9, A, B, C, E, and F are supported.
        As many boards may be installed as interrupt availability allows,
        up to a maximum of ten boards.

        The operator must issue one LOAD command per board.  LOADing is 
        typically performed by the AUTOEXEC.NCF file at startup time.

        To load the AIOESPCA NLM use:

        "load aioespca port=xxx int=x [slavex=yyy] [node=x] [byteio]
                       [name=x] [prescalex=y]"
   
        The brackets indicate optional parameters.

        REQUIRED load parameters (prompted for if not on command line)
        
        port       Specifies I/O address (in hex) used by ESPCA board.
                   This must match the jumpered I/O address designation for
                   the intended board.  Several hardware-jumpered I/O
                   Addresses are available, with the remaining addresses
                   available via software configuration of the board's
                   nonvolatile memory.

                   Valid choices are: 100, 140, 180, 200, 240, 280, 300, 380.
                
        int        Specifies interrupt used by the first port, or Master
                   Port.  Other ports share this interrupt unless
                   specifically assigned an exclusive interrupt using the
                   "slavex=" parameter.

                   Valid choices are: 3, 4, 5, 7, 9, A, B, C, E, F.
                                
        OPTIONAL load parameters:

        slavex     Specifies interrupt used by a particular slave port.
                   Slaves are numbered starting with 1, with the number 
                   replacing the "x" in "slavex".  For example:

                        slave1=7   (assign interrupt 7 to first Slave Port)

                   Valid choices are: 3, 4, 5, 7, 9, A, B, C, E, F.

        node       Specifies board number used by ESPCA adapter. If this
                   parameter is not specified, the driver will assign one
                   based on I/0 address.

        byteio     By default, the AIOESPCA driver performs 16-bit I/O
                   data move operations, which require a 16-bit bus slot.
                   The AIOESPCA driver and ESPCA board may operate in an
                   8-bit slot by specifying this switch.
                   
                   Valid choices are: 0-9.

        name       The user-defined name which correlates to the board
                   loaded.

        prescalex  Specifies a baud rate multiplier for a particular port.
                   Baud rates can be doubled, quadrupled, or octupled using
                   this switch.  For example:

                        prescale0=1  (doubles Master Port baud rates)
                        prescale1=3  (octuples first Slave Port baud rates)

                   Valid choices are: 0-3

                        0 - x1
                        1 - x2
                        2 - x4
                        3 - x8