How to install MC/X non-intelligent board under SCO Xenix/Unix 

     * Driver is built into SCO.
     * Must be setup as COM 2 (adf file COM2 status disabled) 

    Hardware Instructions to install MC/X as COM 2 under SCO Xenix/Unix 

 1. Boot system from your copy of your IBM Reference Diskette.

 2. Select from menu "Copy an Option Diskette". Follow instruction to add
    DigiBoard ADF file to Reference Diskette.
 
 3. Select Set Configuration, Run Automatic Configuration. Save and reboot.
  
    Note: The ADF file contains the information used by the auto-config
    program to select interrupts for interfacing with the DigiBoard MC/X.
    Defaults are what you need to use to setup DigiBoard MC/X.

    Defaults are:   Board Interrupt:     INT 3
	            Start Port Address:  DB80h
	            Status Port Address: DBC0h
	            COM2 Compatability:  Disabled

    SCO Driver Installation for MC/X DigiBoard

    1. Log on to the console, and type at the prompt
       mkdev serial (press return)

    2. The first screen you will see is:

       The following cards are currently configured:
       (any previous installed serial board will be listed)

       i) install a new serial board.
       r) remove an existing board.
       q) quit

       Please enter your choice (i/r/q) > (usually you are picking i)

    3. Serial Board Installation 
       You would like to install a:

       1. 1  port 
       2. 2  port
       3. 4  port - if using MC/4
       4. 5  port
       5. 8  port - if using MC/8
       6. 16 port - if using MC/16 

       Select an option or enter 'q' to quit: select 3, 5, or 6

       The card is configured as:
       1. COM1 (not supported)
       2. COM2
       3. COM3 (not supported)
       4. COM4 (not supported)

       Select an option or enter 'q' to quit: MUST select 2

    4. Which card do you have (the following are supported) ?
       (Pick you DigiBoard type from list below)

       6. DigiBoard 0*3000 (MC/16 only)
       7. DigiBoard 0*DB80 (MC/4,8)

    5. Please enter the baud rate to be used on the modem devices:
       (pick highest baud supported by modem, example 9600) 

    6. The following /etc/gettydefs entries support 9600 baud lines

       1. 9600      
       2. console
       3. 9600H
       4. o
       5. 6
       6. m
       7. sc_m

       Then you should see the following messages:

       System files successfully updated.

       The following standard serial devices have been installed.
       (you will see a list of device names that will be created) 

       You must create a new kernel to effect the driver change you
       specified. Do you wish to create a new kernel now? (y/n)
       (answer yes to this question, then reboot system) 

    7. The systems will create devices in the /dev directory for the
       DigiBoard MC/X, they will be created after system reboot.

       Board setup      Standard devices     Modem control devices

       COM 2            /dev/tty2a-tty2h   /dev/tty2A-tty2H

       Standard devices are usually terminals and printers.
       These ports must have a null modem cable or null modem
       adapter between the DigiBoard and the peripheral to work.
       The basic cabling for x/on x/off flow control is TxD and
       RxD crossed and signal ground straight through. Check your
       DigiBoard hardware manual for proper cabling, if unsure.

       Modem control devices are usually modems.
       These ports must have carrier detect high before the port
       will open. The cabling usually has signal going straight
       from DigiBoard to modem. Check your DigiBoard manual for
       proper cabling, if you have any questions.

    8. How to enable standard port to get a login.

       enable /dev/portname
       example: enable /dev/tty2a	

       Make sure your terminal matches the setup in your inittab
       file for SCO Unix or ttys for SCO Xenix.
       The default is 9600 baud 8 bits no-parity 1 stop bit.