
BOCA RESEARCH INC.

BOCARAM/AT

Card Type          Memory card
Chipset/Controller N/A
I/O Options        N/A
Maximum DRAM       4096KB

[Image]

                                CONNECTIONS

      Purpose           Location           Purpose           Location

  Add-On board             CN1         Add-On board             CN3
  connector                            connector

  Add-On board             CN2         Add-On board             CN4
  connector                            connector

  Note: CN1 interfaces with CN3, CN2 interfaces with CN4

    FACTORY CONFIGURED - DO NOT ALTER

       Switch              Position

        SW2/7         Pins 2 & 3 closed

        SW2/8         Pins 1 & 2 closed

        SYSTEM SPEED CONFIGURATION

        Speed                JP2

        12Mhz        Pins 2 & 3 closed

       < 12Mhz        Pins 1 & 2 closed

                   SYSTEM EXTENDED MEMORY CONFIGURATION

    Ext.        Max.      SW1/1    SW1/2     SW1/3    SW1/4       JP1
   Memory     Memory

    0MB         N/A        Off      Off       On       Off     Pins 2 & 3
                                                                 closed

   512KB        N/A        Off      Off       On        On     Pins 2 & 3
                                                                 closed

   1.0MB        N/A        Off       On       Off      Off     Pins 2 & 3
                                                                 closed

   1.5MB        N/A        Off       On       Off       On     Pins 2 & 3
                                                                 closed

   2.0MB        N/A        Off       On       On       Off     Pins 2 & 3
                                                                 closed

   2.5MB        N/A        Off       On       On        On     Pins 2 & 3
                                                                 closed

   3.0MB        N/A        On       Off       Off      Off     Pins 2 & 3
                                                                 closed

   3.5MB       3.5MB       On       Off       Off       On     Pins 2 & 3
                                                                 closed

   4.0MB       2.0MB       On       Off       On       Off     Pins 2 & 3
                                                                 closed

   4.5MB       2.5MB       On       Off       On        On     Pins 2 & 3
                                                                 closed

   5.0MB       2.0MB       On        On       Off      Off     Pins 2 & 3
                                                                 closed

   5.5MB       1.5MB       On        On       Off       On     Pins 2 & 3
                                                                 closed

   6.0MB       1.0MB       On        On       On       Off     Pins 2 & 3
                                                                 closed

   6.5MB       512KB       On        On       On        On     Pins 2 & 3
                                                                 closed

   7.0MB        N/A        Off      Off       Off      Off     Pins 1 & 2
                                                                 closed

   7.5MB        N/A        Off      Off       Off       On     Pins 1 & 2
                                                                 closed

   8.0MB        N/A        Off      Off       On       Off     Pins 1 & 2
                                                                 closed

   8.5MB        N/A        Off      Off       On        On     Pins 1 & 2
                                                                 closed

   9.0MB        N/A        Off       On       Off      Off     Pins 1 & 2
                                                                 closed

   9.5MB        N/A        Off       On       Off       On     Pins 1 & 2
                                                                 closed

   10.0MB       N/A        Off       On       On       Off     Pins 1 & 2
                                                                 closed

   10.5MB       N/A        Off       On       On        On     Pins 1 & 2
                                                                 closed

   11.0MB      3.5MB       On       Off       Off      Off     Pins 1 & 2
                                                                 closed

   11.5MB      2.0MB       On       Off       Off       On     Pins 1 & 2
                                                                 closed

   12.0MB      2.5MB       On       Off       On       Off     Pins 1 & 2
                                                                 closed

   12.5MB      2.0MB       On       Off       On        On     Pins 1 & 2
                                                                 closed

   13.0MB      1.5MB       On        On       Off      Off     Pins 1 & 2
                                                                 closed

   13.5MB      1.0MB       On        On       Off       On     Pins 1 & 2
                                                                 closed

   14.0MB      512KB       On        On       On       Off     Pins 1 & 2
                                                                 closed

  Note: Extended memory is memory already installed prior to adding
  BOCARAM/AT Card.

  Maximum memory is the maximum amount of memory that can be added from
  the BOCARAM/AT card.

                 BOCARAM/AT EXTENDED MEMORY CONFIGURATION

     Extended        SW1/5          SW1/6         SW1/7         SW1/8
     Memory

      512KB           Off            Off           Off            On

      1.0MB           Off            Off           On            Off

      1.5MB           Off            Off           On             On

      2.0MB           Off            On            Off           Off

      2.5MB           Off            On            Off            On

      3.0MB           Off            On            On            Off

      3.5MB           Off            On            On             On

      4.0MB            On            Off           Off           Off

      None            Off            Off           Off           Off

                        I/O PORT ADDRESS SELECTION

       Address            SW2/1        SW2/2        SW2/3        SW2/4

        268h-269h         Off          Off          Off           On

         208h-209h         On           Off          Off          Off

         218h-219h         Off           On          Off          Off

         258h-259h         Off          Off           On          Off

                      FRAME SEGMENT ADDRESS SELECTION

          Address                    SW1/5                  SW1/6

             D000h                   Off                     On

              E000h                    On                    Off

[Image]

  BOCARAM/AT EXTENDED MEMORY CONFIGURATION IN ADDITION TO CONVENTIONAL MEMORY

  Memory   SW1/1  SW1/2   SW1/3   SW1/4   SW1/5   SW1/6   SW1/7   SW1/8   JP1

   0KB     Off     Off     Off     On      Off    Off     Off      On     2 &
                                                                          3

  512KB    Off     Off     Off     On      Off    Off      On     Off     2 &
                                                                          3

  1.0MB    Off     Off     Off     On      Off    Off      On      On     2 &
                                                                          3

  1.5MB    Off     Off     Off     On      Off     On     Off     Off     2 &
                                                                          3

  2.0MB    Off     Off     Off     On      Off     On     Off      On     2 &
                                                                          3

  2.5MB    Off     Off     Off     On      Off     On      On     Off     2 &
                                                                          3

  3.0MB    Off     Off     Off     On      Off     On      On      On     2 &
                                                                          3

  3.5MB    Off     Off     Off     On      On     Off     Off     Off     2 &
                                                                          3

  Note:Pins designated should be in the closed position.

                         DRAM CONFIGURATION

     Size        Bank 0        Bank 1        Bank 2        Bank 3

    128KB       (16) 4164       None          None          None

    512KB      (16) 41256       None          None          None

     1MB       (16) 41256    (16) 41256       None          None

    1.5MB      (16) 41256    (16) 41256    (16) 41256       None

     2MB       (16) 41256    (16) 41256    (16) 41256    (16) 41256

                  DRAM CONFIGURATION - ADD-ON BOARD

     Size        Bank 4        Bank 5        Bank 6        Bank 7

    2.5MB      (16) 41256       None          None          None

     3MB       (16) 41256    (16) 41256       None          None

    3.5MB      (16) 41256    (16) 41256    (16) 41256       None

     4MB       (16) 41256    (16) 41256    (16) 41256    (16) 41256

