Premium/286 FASTram Board                           AST Part Number 202146-003

The Fastram is the High-Speed , 3-connector system memory board that comes
standard in the AST Premium/286. FASTRAM uses all 3 connectors of the special
FASTSLOTs on the system board.  FASTRAM and FASTSLOTs work together to ensure
fast, compatible memory function. FASTRAM can be configured for any
combination of expanded and/or Linear memory.


FASTSLOT

The High speed slots that use a special third connector as a direct interface
to the 80286 microprocessor. The third connector is an addition to the
standard AT bus, and provides zero wait state operation at 6-, 8-, and 10-Mhz
operating speeds.


SWITCH SETTINGS

    FASTRAM Linear
    Memory Size    1      2      3      4      5
    +----------+------+------+------+------+------+
    | **  0 KB |  X   |  X   |  X   |  X   | OFF  |
    |   128 KB |   ON |   ON |   ON |   ON |  ON  |
    |   256 KB |  OFF |   ON |   ON |   ON |  ON  |
    |   384 KB |   ON |  OFF |   ON |   ON |  ON  |
    |   512 KB |  OFF |  OFF |   ON |   ON |  ON  |
    | * 640 KB |   ON |   ON |  OFF |   ON |  ON  |
    |   896 KB |   ON |  OFF |  OFF |   ON |  ON  |
    |  1024 KB |  OFF |  OFF |  OFF |   ON |  ON  |
    |  1152 KB |   ON |   ON |   ON |  OFF |  ON  |
    |  1280 KB |  OFF |   ON |   ON |  OFF |  ON  |
    |  1408 KB |   ON |  OFF |   ON |  OFF |  ON  |
    |  1536 KB |  OFF |  OFF |   ON |  OFF |  ON  |
    |  1664 KB |   ON |   ON |  OFF |  OFF |  ON  |
    |  1792 KB |  OFF |   ON |  OFF |  OFF |  ON  |
    |  1920 KB |   ON |  OFF |  OFF |  OFF |  ON  |
    |  2048 KB |  OFF |  OFF |  OFF |  OFF |  ON  |
    +----------+------+------+------+------+------+
      * Default setting (First FASTRAM board in the System)
     ** Switch 5 OFF configures all FASTRAM memory as Expanded (paged) memory.

    NOTE: If this is the second FASTRAM board in your computer and less than 2
          MB from the first board is allocated as linear memory, none of the
          memory on the second board will be allocated as linear.


    FASTRAM base
    I/O address     7      8      9     10
    +----------+------+------+------+------+
    |    0208  |   ON |   ON |   ON |   ON |
    |  * 0218  |  OFF |   ON |   ON |   ON |
    | ** 0258  |  OFF |   ON |  OFF |   ON |
    |    0268  |   ON |  OFF |  OFF |   ON |
    |    02A8  |   ON |  OFF |   ON |  OFF |
    |    02B8  |  OFF |  OFF |   ON |  OFF |
    |    02E8  |   ON |  OFF |  OFF |  OFF |
    +----------+------+------+------+------+
      * Default setting (First FASTRAM board).
     ** Recommended setting for second FASTRAM board.






    SWITCH 6
    +-----+----------------------------------------------+
    |  ON | First FASTRAM board in system (can address   |
    |     | linear memory from 0-640 KB and 1024-2432 KB)|
    +-----+----------------------------------------------+
    | OFF | Second FASTRAM board (can address linear     |
    |     | memory from 2432-4480 KB)                    |
    +-----+----------------------------------------------+


JUMPER CONFIGURATION

    +--------------+--------------------------+
    | E1 installed | Parity checking enabled  |
    | E1 removed   | Parity checking disabled |
    +--------------+--------------------------+

    +--------------+--------------------------+
    | E2 installed | Zero wait state enabled  |
    | E2 removed   | Zero wait state disabled |
    +--------------+--------------------------+


JUMPER AND SWITCH LOCATION


    ͻ
                                                +-------+           
                                                |S1  S10|          Ķ
                                                +-------+           
                                                                    
                                                                    
                                                                    
                                                                    
                                                                    
      E1                                         E2 ----> *         
     Jumper-->* *                              Jumper     *        Ķ
    ͻ            ͻ        ͻ            ͼ 
           ͼ              ͼ ͼ      
                                                                      
