
UNIDENTIFIED

3486U

Processor        80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed  20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set         UNI
Max. Onboard DRAM32MB
Cache            32/64/128/256KB
BIOS             AMI
Dimensions       254mm x 218mm
I/O Options      None
NPU Options      80387DX

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J4       Turbo LED                 JP15

  Power LED & keylock          J5       Turbo switch              JP17

  Speaker                      J6       Reset switch              JP18

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color               JP1             Closed

      Monitor type select monochrome          JP1              Open

     CMOS memory normal operation            JP2           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP2           pins 2 & 3
                                                              closed

     CPU type select all CPU types           JP3             Closed

      CPU type select 80386DX only            JP3              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

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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     32KB        (4) 8K x 8        NONE       (1) 8K x 8

     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          JP5             JP6             JP7           JP8

     32KB          Open         pins 2 & 3        Open           Open
                                  closed

     64KB         Closed        pins 1 & 2        Open           Open
                                  closed

    128KB         Closed       pins 1 & 2, 3     Closed          Open
                                & 4 closed

    256KB         Closed       pins 1 & 2, 4     Closed         Closed
                                & 5 closed

                       CPU TYPE CONFIGURATION

   Type      JP4      JP9      JP10      JP12      JP14      JP16

  80386     Open     1 & 2     2 & 3     2 & 3     Open     2 & 3

  80486     Closed   2 & 3     1 & 2     1 & 2    2 & 3     1 & 2

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

                Type                                  JP13

               80386DX                                Open

           80486SX (PQFP)                             Open

            80486SX (PGA)                  pins 5 & 6, 9 & 10 closed

               80487SX                   pins 2 & 3, 4 & 5, 6 & 7, 8 & 9
                                                     closed

           80486DX (PQFP)                             Open

            80486DX (PGA)               pins 1 & 2, 4 & 5, 6 & 7, 9 & 10
                                                     closed

              80486DX2                  pins 1 & 2, 4 & 5, 6 & 7, 9 & 10
                                                     closed

