I/O PLUS                                           AST Part Number 03-01144-01

The I/O Plus  is a multifunction board for the IBM PC, PC/XT, and 100%
compatibles running at 4.77MHz.  This board comes standard with a real-time
clock/calander and a serial port configurable as COM1: or COM2:.  Optional
upgrades include a second serial port, and a parallel port.


JUMPER SETTINGS

    PORT ENABLE BLOCK

        C1 - Attach to enable serial as COM1:
        C2 - Attach to enable serial as COM2:
        S2 - Attach to enable second serial option as COM2:
        P1 - Attach to enable parallel option as LPT1:
        P2 - Attach to enable parallel option as LPT2:


    IRQ BLOCK

        5C - N/A - Leave open
        5S - N/A - Leave open
        4  - IRQ 4 - Attach for use with COM1:
        3  - IRQ 3 - Attach for use with COM2: (primary port)
        3S - IRQ 3 - Attach for use with COM2: (second port option)
        2C - N/A - Leave open
        2S - N/A - Leave open


JUMPER LOCATIONS

    +------------------------------------------------+
    |                                                | +---
    |                                                |=|
    |                                                | |
    |                                                | |
    |                                                | |
    |                                                | |
    |                  PORT  :                       | |
    |                  ENABLE:                       | |
    |       BATTERY          :                       | |
    |                          ........ IRQ          |=|
    +------------------------------+            +----+ |
                                   +------------+      |
                                                       |