
UNIDENTIFIED

BC3486UL

Processor      80386DX/CX486DLC/80486SX/80487SX/ODP487SX/80486DX/ 80486DX2
Processor      20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set       UMC
Video Chip Set None
Maximum        32MB
Onboard Memory
Maximum Video  None
Memory
Cache          64/128/256KB
BIOS           AMI
Dimensions     254mm x 218mm
I/O Options    Local bus slot
NPU Options    80387DX/CX83D87

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                  Location

  External battery         BATT       Turbo switch                CN4

  Power LED & keylock       CN1       Turbo LED                   CN5

  Speaker                   CN2       Auxiliary keyboard          KBD
                                      connector

  Reset switch              CN3       Local bus slot              SL1

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Battery type select internal            BATT          Pins 2 & 3
                                                              closed

      Battery type select external            BATT            Closed

      CMOS memory clear                       BATT          Pins 3 & 4
                                                              closed

      Monitor type select color               C/M             Closed

      Monitor type select monochrome          C/M              Open

                  DRAM CONFIGURATION

       Size             Bank 0            Bank 1

       1MB           (4) 256K x 9          None

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

       4MB            (4) 1M x 9           None

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

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

       16MB           (4) 4M x 9           None

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

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

  Note: The location of banks 0 & 1 is unidentified.

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8

     128KB      (4) 32K x 8        None       (1) 8K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8

                  CACHE JUMPER CONFIGURATION

  Size      JS1     JS2      JS3      JS4      JS5      JS6

  64KB     1 & 2   1 & 2    1 & 2    1 & 2    1 & 2    2 & 3

  128KB    2 & 3   2 & 3    2 & 3    1 & 2    1 & 2    1 & 2

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

  Note: Pins designated should be in the closed position.

                   CPU SPEED SELECTION (80386)

   Speed       JF1        JF2        JF3        JF4       JF5

   25MHz      Open      Closed     Closed     Closed      Open

   33MHz      Open       Open      Closed     Closed     Closed

   40MHz      Open      Closed      Open      Closed     Closed

                   CPU SPEED SELECTION (80486)

   Speed       JF1        JF2        JF3        JF4       JF5

   20MHz     Closed     Closed      Open       Open      Closed

   25MHz      Open      Closed     Closed      Open      Closed

   33MHz      Open       Open      Closed      Open      Closed

  50iMHz      Open      Closed     Closed      Open      Closed

   50MHz      Open       Open       Open       Open       Open

  66iMHz      Open       Open      Closed      Open       Open

                            CPU TYPE SELECTION

      Type           JC1            JC2           JC3            JC4

     80386        Pins 2 & 3     Pins 2 & 3    Pins 2 & 3     Pins 2 & 3
                    closed        closed         closed         closed

    CX486DLC      Pins 2 & 3     Pins 2 & 3    Pins 2 & 3     Pins 2 & 3
                    closed        closed         closed         closed

     80486        Pins 1 & 2     Pins 1 & 2    Pins 1 & 2     Pins 1 & 2
                    closed        closed         closed         closed

                      CPU TYPE SELECTION (80486 ONLY)

          Type                     JC5                      J6C

         80486SX            Pins 2 & 3 closed               Open

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

        ODP487SX             Pins 1 & 2, 3 & 4       Pins 2 & 3 closed
                                  closed

         80486DX             Pins 1 & 2, 3 & 4       Pins 1 & 2 closed
                                  closed

        80486DX2             Pins 1 & 2, 3 & 4       Pins 1 & 2 closed
                                  closed

                        NPU SELECTION

       Setting               JC7                  JC8

  NPU not installed          Open                 Open

    NPU installed           Closed               Closed

                         LOCAL BUS SLOT SELECTION

       Setting               J1               J2                J3

   Normal ISA cards       Pins 2 & 3       Pins 2 & 3        Pins 2 & 3
      installed            closed           closed            closed

    Local Bus cards       Pins 1 & 2       Pins 1 & 2        Pins 1 & 2
      installed            closed           closed            closed

              LOCAL BUS CARD INSTALLED SELECTION

    CPU installed             J4                   J5

        80386          Pins 2 & 3 closed   Pins 2 & 3 closed

     80486DX-50        Pins 2 & 3 closed   Pins 2 & 3 closed

    All CPU types      Pins 1 & 2 closed   Pins 1 & 2 closed

