UNIDENTIFIED

MS-4109

Processor         80486SX/80487SX/80486DX
Processor Speed   16/20/25/33/50MHz
Chip Set          Contaq
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose               Location     Purpose                  Location

  Power LED &          J3 pins 1 -   Reset switch            J3 pins 19 -
  keylock                  5                                     20

  Speaker              J3 pins 7 -   Auxiliary keyboard          J4
                           10        connector

  Turbo LED           J3 pins 12 -   External battery            JP2
                           13

  Turbo switch        J3 pins 15 -
                           17

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select monochrome          JP1              Open

      Monitor type select CGA                 JP1             Closed

  »   Battery type select internal            JP2           pins 2 & 3
                                                              closed

      Battery type select external            JP2           pins 1 & 4
                                                              closed

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

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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 4M x 9     (4) 256K 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

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

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

                        CACHE JUMPER CONFIGURATION

                Size                                 JP8

                64KB                  pins 1 & 5, 3 & 7, 9 & 13, 11 & 15
                                                    closed

               256KB                  pins 2 & 6, 4 & 8, 10 & 14, 12 & 16
                                                    closed

                          CPU TYPE CONFIGURATION

                Type                                  JP7

               80486SX                  pins 2 & 6, 4 & 8, 10 & 14, 12 &
                                                   16 closed

               80487SX                 pins 1 & 2, 3 & 4, 9 & 10, 11 & 12
                                                    closed

               80486DX                  pins 1 & 2, 3 & 4, 13 & 14, 15 &
                                                   16 closed

         CPU SPEED CONFIGURATION

        Speed                JP9

        16MHz         pins 1 & 2 closed

        20MHz         pins 1 & 2 closed

        25MHz         pins 2 & 3 closed

        33MHz         pins 2 & 3 closed

        50MHz         pins 2 & 3 closed

                       CPU CLOCK SPEED CONFIGURATION

         Speed                 JP3              JP5             JP6

  16MHz (asynchronous)      pins 2 & 3         Open             Open
                             closed

  20MHz (synchronous)       pins 1 & 2         Open             Open
                             closed

  25MHz (synchronous)       pins 1 & 2        Closed            Open
                             closed

  33MHz (synchronous)       pins 1 & 2         Open            Closed
                             closed

  50MHz (synchronous)       pins 1 & 2        Closed           Closed
                             closed