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R486DX 33 MIBBC

Processor         80486SX/80487SX/80486DX/80486DX2
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          UMC
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Power LED & keylock         J1       Turbo switch                J4

  Speaker                     J2       Reset switch                J5

  Turbo LED                   J3       External battery            J6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select CGA                 JP5             Closed

      Monitor type select monochrome          JP5              Open
      EGA/VGA

  »   Battery type select internal            JP7             Closed

      Battery type select external            JP7              Open

  »   Factory configured - do not             JP8              Open
      alter

  »   Factory configured - do not             JP9           pins 1 & 2
      alter                                                   closed

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       1MB         (4) 256K x 9         NONE

       2MB         (4) 256K x 9    (1) 256K x 36

       4MB          (4) 1M x 9          NONE

       5MB         (4) 256K x 9     (1) 1M x 36

       8MB          (4) 1M x 9      (1) 1M x 36

      16MB          (4) 4M x 9          NONE

      20MB          (4) 1M x 9      (1) 4M x 36

      32MB          (4) 4M x 9      (1) 4M x 36

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     64KB        (4) 8K x 8     (4) 8K x 8    (2) 16K x 4

     128KB      (4) 32K x 8        NONE       (2) 16K x 4

     256KB      (4) 32K x 8    (4) 32K x 8    (2) 16K x 4

                        CACHE JUMPER CONFIGURATION

  Size      W10      W11       W12      W13      W14   W15    W16    W17

  64KB     Open      Open     Open      Open     1 &   1 &    1 &   Open
                                                 2      2     2

  128KB    Closed    Open     Closed    Open     1 &   1 &    2 &   1 & 2
                                                 2      2     3

  256KB    Closed   Closed    Closed   Closed    2 &   2 &    1 &   2 & 3
                                                 3      3     2

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

           Type                      JP2                    JP11

          80486SX                    Open             pins 2 & 3 closed

          80487SX             pins 1 & 2 closed       pins 1 & 2, 3 & 4
                                                           closed

        80486DX/DX2           pins 2 & 3 closed       pins 1 & 2, 3 & 4
                                                           closed