RamCard/386                                         AST Part Number 202183-001

The RamCard/386 is the adapter that contains the memory for the Premium/386
Computer.  It comes standard with all versions of this system, and is
neccessary for the computer to operate, as the AST Premium/386 has no RAM on
the motherboard.  This memory adapter must be installed in Slot One (far
left), which is specifically designed for 32-bit data transfer.

There are four memory banks on the RamCard, and each bank consists of four
SIMM (Single In-line Memory Module) Modules.  A bank may NOT be partially
filled (1, 2, or 3 SIMMs).  Bank Zero will accept 256K SIMMs; Banks One, Two
and Three will accept either 256K or 1024K SIMMs.  If both types of modules
are used, the 256K SIMMs must be in the lower-numbered banks.  The AST Part
Number for a 1MB Bank (4 256K SIMMs) for this product is 500510-003.  The Part
Number for a 4MB Bank (4 1024K SIMMs) is 500510-004.  For more info on
acceptable RAM, see AST Tech Bulletin #0516.


CONFIGURATION

    Below is a matrix showing all valid memory configurations and the switch
    settings required for each possible combination.  A bank listed as 1024K
    contains four 256K SIMMs; a bank listed as 4096K contains four 1024K
    SIMMs.

    BANK O  BANK 1  BANK 2  BANK 3   TOTAL    SW1  SW2  SW3  SW4  SW5  SW6
    ------  ------  ------  ------  ------    ---  ---  ---  ---  ---  ---
    1024K     -       -       -       1 MB    OFF  OFF  OFF  OFF  OFF  OFF
    1024K   1024K     -       -       2 MB    OFF  ON   OFF  OFF  OFF  OFF
    1024K   1024K   1024K     -       3 MB    OFF  ON   OFF  ON   OFF  OFF
    1024K   1024K   1024K   1024K     4 MB    OFF  ON   OFF  ON   OFF  ON
    1024K   4096K     -       -       5 MB    ON   OFF  OFF  OFF  OFF  OFF
    1024K   1024K   4096K     -       6 MB    OFF  ON   ON   OFF  OFF  OFF
    1024K   1024K   1024K   4096K     7 MB    OFF  ON   OFF  ON   ON   OFF
    1024K   4096K   4096K     -       9 MB    ON   OFF  ON   OFF  OFF  OFF
    1024K   1024K   4096K   4096K    10 MB    OFF  ON   ON   OFF  ON   OFF
    1024K   4096K   4096K   4096K    13 MB    ON   OFF  ON   OFF  ON   OFF

    NOTE: SW7 - Enables Parity and should remain ON at all times
          SW8 - Is not used


LOCATIONS

    ͻ
     +------+                   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   
     +------+                   |   | | |   | | |   | | |   | | |  Ķ
      SW 1-8                    | B | | | B | | | B | | | B | | |   
                                |  A  | |  A  | |  A  | |  A  | |   
                                | | N | | | N | | | N | | | N | |   
                                | |  K  | |  K  | |  K  | |  K  |   
                                | | | 3 | | | 2 | | | 1 | | | 0 |   
                                | | |   | | |   | | |   | | |   |   
                                | | | | | | | | | | | | | | | | |   
                                +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+  Ķ
    ͻ            ͼ 
      ͼ
     32-BIT CONNECTOR
