CC-432                                              AST Part Number 201178-001

This board is used with AST 5251/12 for system 3X remote terminal emulation,
and with AST 3780, AST SNA, AST BSC for mainframe computer remote terminal
emulation.  It is a three quarter size board and has a dip switch block of
eight switches, a baud rate selection jumper block, and a DTE/DCE mode select
jumper block.


SWITCH SETTINGS

    I/O Address

        Sw#1     Sw#2     I/O Address (Hex)
        -------------------------------------
         ON       ON         300 - 30F
         OFF      ON         320 - 32F
         ON       OFF        340 - 34F
         OFF      OFF        360 - 36F

    Interrupt Request (Enable ONE ONLY)

        Sw#         IRQ
        -----------------
        3 ON         7
        4 ON         6
        5 ON         5
        6 ON         4
        7 ON         3
        8 ON         2


JUMPER SETTINGS

    Baud select jumper block:
        Set the jumper to match the modem baud rate, when used in DTE mode.

    DTE/DCE mode select jumper block:
        For DTE configuration set the shorting plugs at 1,3 and 8.
        For DCE configuration set the shorting plugs at 2,4 and 8.
        Leave positions 5, 6, 7, and 9 empty.


SWITCH AND JUMPER LOCATIONS

    ͻ
                         DTE/DCE                     
              ******      *****                     Ķ
               BAUD       ****                       
              SELECT                                 
                                                     
                                                     
                        +-----------+                
                        | SW1 - SW8 |                
                        +-----------+                
                        Dip Switch S1               Ķ
    ͻ            ͼ 
                                   ͼ      
                                                       
