Advantage!                                          AST Part Number 202051-001

The Advantage is a multi-function memory expansion adapter for the IBM PC/AT
and 100% compatibles running at a speed of 8MHz.  The Advantage can be
configured from 128K to 3072K of memory using industry standard 64K or 256K
dynamic RAM chips with a speed rating of at least 120NS.  Standard I/O
features would include a DB9 serial port configurable as COM1:  or COM2:, and
a parallel port configurable as LPT1: or LPT2:.  Options available are a
second serial port, a game port, and a memory expansion daughterboard (for
higher than 1536K installed on the Advantage).

The memory on the Advantage can be used to bring conventional memory to it's
640K maximum, and to add extended linear memory to your AT or compatible.  The
Advantage does not support LIM, EMS, or EEMS expanded memory.


SWITCH SETTINGS

    SW1 - MEMORY INSTALLED ON ADVANTAGE

        NUMBER OF
        ROWS INSTALLED
        ON ADVANTAGE    ROW1 ROW2 ROW3 ROW4 ROW5 ROW6  SW1 SW2 SW3 SW4 SW5
        --------------  ---- ---- ---- ---- ---- ----  --- --- --- --- ---
            1  (128K)   128K                           OFF OFF OFF OFF  ON
            1  (512K)   512K                           OFF OFF  ON  ON  ON

            2  (256K)   128K 128K                      OFF OFF OFF  ON OFF
            2  (640K)   128K 512K                       ON OFF OFF OFF OFF
            2 (1024K)   512K 512K                      OFF  ON OFF OFF OFF

            3  (384K)   128K 128K 128K                 OFF OFF OFF  ON  ON
            3  (768K)   128K 128K 512K                  ON OFF  ON OFF  ON
            3 (1152K)   128K 512K 512K                  ON OFF OFF OFF  ON
            3 (1536K)   512K 512K 512K                 OFF  ON OFF OFF  ON

            4  (512K)   128K 128K 128K 128K            OFF OFF  ON OFF OFF
            4  (896K)   128K 128K 128K 512K             ON  ON OFF OFF  ON
            4  (1280)   128K 128K 512K 512K             ON OFF  ON  ON OFF
            4  (1664)   128K 512K 512K 512K             ON OFF OFF  ON OFF
            4  (2048)   512K 512K 512K 512K            OFF  ON OFF  ON OFF

            5   (640)   128K 128K 128K 128K 128K       OFF OFF  ON OFF  ON
            5  (1024)   128K 128K 128K 128K 512K        ON  ON  ON OFF OFF
            5  (1408)   128K 128K 128K 512K 512K        ON  ON OFF  ON OFF
            5  (1792)   128K 128K 512K 512K 512K        ON OFF  ON  ON  ON
            5  (2176)   128K 512K 512K 512K 512K        ON OFF OFF  ON  ON
            5  (2560)   512K 512K 512K 512K 512K       OFF  ON OFF  ON  ON

            6   (768)   128K 128K 128K 128K 128K 128K  OFF OFF  ON  ON OFF
            6  (1152)   128K 128K 128K 128K 128K 512K   ON  ON  ON  ON OFF
            6  (1536)   128K 128K 128K 128K 512K 512K   ON  ON  ON OFF  ON
            6  (1920)   128K 128K 128K 512K 512K 512K   ON  ON OFF  ON  ON
            6  (2304)   128K 128K 512K 512K 512K 512K   ON  ON OFF OFF OFF
            6  (2688)   128K 512K 512K 512K 512K 512K   ON OFF  ON OFF OFF
            6  (3072)   512K 512K 512K 512K 512K 512K  OFF  ON  ON OFF OFF
        --------------  ---- ---- ---- ---- ---- ----  --- --- --- --- ---












        NOTE: Row one would consist of the eighteen RAM chips on the top
              edge of the board, with row two in the middle and row three
              on the bottom.  Rows four thru six are on the Advantage-Pak
              optional piggyback memory board.  Each row can accomodate 64K
              or 256K DRAM chips.  If 64K chips (128K banks) are used, they
              must occupy the lower numbered banks, as in the above switch
              summary.

        SW1-6 - N/A

        SW1-7 - N/A

        SW1-8 - Parity check (Recommend "ON" at all times)


    SWITCH BLOCK TWO - I/O PORT ENABLE

        SW2-1 - On to enable first serial port as COM1:

        SW2-2 - On to enable first serial port as COM2:

        SW2-3 - On to enable second serial option as COM2:

        SW2-4 - On to enable parallel port as LPT1:

        SW2-5 - On to enable parallel port as LPT2:

        SW2-6 - On to enable game port option

        SW2-7 - N/A

        SW2-8 - N/A


    SWITCH BLOCK THREE - MEMORY STARTING ADDRESS

        START
        ADDRESS         SW1  SW2  SW3  SW4  SW5  SW6  SW7
        --------------  ---  ---  ---  ---  ---  ---  ---
          256K           ON   ON   ON   ON   ON  OFF   ON
          512K           ON   ON   ON   ON  OFF   ON   ON
         1024K           ON   ON   ON  OFF   ON   ON   ON
         1152K           ON   ON   ON  OFF   ON   ON  OFF
         1280K           ON   ON   ON  OFF   ON  OFF   ON
         1408K           ON   ON   ON  OFF   ON  OFF  OFF
         1536K           ON   ON   ON  OFF  OFF   ON   ON
         1664K           ON   ON   ON  OFF  OFF   ON  OFF
         1792K           ON   ON   ON  OFF  OFF  OFF   ON
         1920K           ON   ON   ON  OFF  OFF  OFF  OFF
         2048K           ON   ON  OFF   ON   ON   ON   ON
         2176K           ON   ON  OFF   ON   ON   ON  OFF
         2304K           ON   ON  OFF   ON   ON  OFF   ON
         2432K           ON   ON  OFF   ON   ON  OFF  OFF
         2560K           ON   ON  OFF   ON  OFF   ON   ON
         2688K           ON   ON  OFF   ON  OFF   ON  OFF
         2816K           ON   ON  OFF   ON  OFF  OFF   ON
         2944K           ON   ON  OFF   ON  OFF  OFF  OFF
         3072K           ON   ON  OFF   ON   ON   ON   ON
         4096K  (4MB)    ON  OFF   ON   ON   ON   ON   ON
         5120K  (5MB)    ON  OFF   ON  OFF   ON   ON   ON
         6144K  (6MB)    ON  OFF  OFF   ON   ON   ON   ON
         7168K  (7MB)    ON  OFF  OFF  OFF   ON   ON   ON
         8192K  (8MB)   OFF   ON   ON   ON   ON   ON   ON
         9216K  (9MB)   OFF   ON   ON  OFF   ON   ON   ON
        10240K (10MB)   OFF   ON  OFF   ON   ON   ON   ON
        11264K (11MB)   OFF   ON  OFF  OFF   ON   ON   ON
        12288K (12MB)   OFF  OFF   ON   ON   ON   ON   ON
        13312K (13MB)   OFF  OFF   ON  OFF   ON   ON   ON
        14336K (14MB)   OFF  OFF  OFF   ON   ON   ON   ON
        15360K (15MB)   OFF  OFF  OFF  OFF   ON   ON   ON

    The above list of addresses is not complete.  After the 3072K
    address, we have listed the settings for every megabyte only.
    Switches 5,6 & 7 determine the addresses between.  If you are
    unable to interpolate the correct starting address from the above
    information, contact AST to order the complete documentation.

    NOTE: The "STARTING ADDRESS" is not the same as "MEMORY INSTALLED
          IN SYSTEM".  Because of the reserved rom area residing
          between A0000h and 100000h, extended memory has a linear
          starting address of 1024K.

          In simple terms, if your system has more than 512K, the actual
          starting address is equal to total system memory plus 384.

          Some examples:

              SYSTEM  STARTING
              MEMORY  ADDRESS
              ------  --------
               256K     256K
               512K     512K
               640K     1024K   (640 + 384)
              1024K     1408K  (1024 + 384)
              3328K     3712K  (3328 + 384)


JUMPER SETTINGS

    J6 LOCATION

        7 - IRQ 7; Attach for use with LPT1:
        5 - IRQ 5; Attach for use with LPT2:
        4 - IRQ 4; Attach for use with COM1: (first port)
        3 - IRQ 3; Attach for use with COM2: (first port)
        3 - IRQ 3; Attach for use with COM2: (second port)


        The above jumper settings are to be used in combination with the
        settings on Switch Block Two.  For example, if the first serial port is
        to configured as COM2:, SW2-2 should be in the "ON" position, and J6
        location "3" (next to the "4") should be attached.


    J7 LOCATION (TOP-RIGHT PORTION OF BOARD)

        1 - CTS FORCED TRUE (first serial port)
        2 - CTS NORMAL      (first serial port)
        3 - DSR FORCED TRUE (first serial port)
        4 - DSR NORMAL      (first serial port)
        5 - DCD FORCED TRUE (first serial port)
        6 - DCD NORMAL      (first serial port)









    J8 LOCATION (TOP-RIGHT PORTION OF BOARD)

        1 - CTS FORCED TRUE (second serial port)
        2 - CTS NORMAL      (second serial port)
        3 - DSR FORCED TRUE (second serial port)
        4 - DSR NORMAL      (second serial port)
        5 - DCD FORCED TRUE (second serial port)
        6 - DCD NORMAL      (second serial port)


SWITCH BLOCK AND JUMPER LOCATIONS

    ͻ
                                                                    
                                                        J7 ******  Ķ
                                                        J8 ******   
                                                                    
                                            _______                 
                                           |_SW1___|                
                                           |_SW2___|                
                                           |_SW3___|                
                                                                    
                                                   J6 *****        Ķ
    ͻ        ͻ            ͼ 
                                       ͼ ͼ      
                                                                      
