FOUR-PORT FOR DOS (CC832)                           AST Part Number 202013-xxx

Four-Port/DOS provides the software, hardware and information necessary to
access up to ten RS-232C ports using two CC832 cards on IBM PC, XT, AT, or
100% compatibles.


SWITCH SETTINGS

    The instructions below aply to CC832 board with three switch blocks SW1,
    SW2 and SW3.  Blocks SW1 and SW2 have three toggle switches on each and
    the block SW3 has four toggle switches on it.

        SW1 and SW2 select the IRQ for this board.
        Enable ONE ONLY
        ======================
        SW1-1 ON enables IRQ-2
        SW1-2 ON enables IRQ-3
        SW1-3 ON enables IRQ-4
        SW2-1 ON enables IRQ-5
        SW2-2 ON enables IRQ-6
        SW2-3 ON enables IRQ-7

        SW3-1 ON  Sets the board in Compatible mode, which sets the board
                  for COM1,COM2,COM3 and COM4 ports.
        SW3-1 OFF Sets the board in Enhanced mode, which sets the board for
                  COM3,COM4,COM5 and COM6 ports.

        SW3-2 ON  Sets the high order I/O address range, which is used with
                  AT or AT clones.
        SW3-2 OFF Sets the low order I/O address range, which is used with
                  PC, XT or clones.

        SW3-3 ON  ALWAYS.

        SW3-4 OFF ALWAYS.


EXAMPLES

To set four ports as COM1, COM2, COM3 and COM4:

    1) Disable the com ports 1 & 2 from the mother board.

    2) Set the board for Compatible mode with SW3-1 ON.

    3) If the installation is on PC, XT or their clones,
       - Set IRQ-2 with SW1-1 ON
       - Set low order I/O address with SW3-2 OFF.

    4) If the installation is on AT or an AT clone,
       - Set IRQ-5 with SW2-1 ON,
       - Set high order I/O address with SW3-2 ON.

To set four ports as COM3, COM4, COM5 and COM6:

    1) Set the board for Enhanced mode with SW3-1 OFF.

    2) Follow the instructions 3 or 4 from above.









SWITCH BLOCK LOCATIONS

    ͻ
                                      
                                     Ķ
                                      
                                      
                                      
                                      
                                      
    +---+ +---+ +----+                
    |SW1| |SW2| |SW3 |                
    +---+ +---+ +----+               Ķ
    ͻ            ͼ 
                    ͼ      
                                        
