DTK COMPUTER, INC.

PEM-2531D

Processor             80386DX
Processor Speed       25MHz
Chip Set              DTK
Max. Onboard DRAM     16MB (8MB on external memory card)
Cache                 None
BIOS                  DTK
Dimensions            333mm x 222mm
I/O Options           32-bit external memory card slot (PEI-307)
NPU Options           80387/3167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Power LED & keylock        J1        Turbo switch                J4

  Speaker                    J2        Reset switch                J5

  Turbo LED                  J3        32-bit external             S1
                                       memory card

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   CPU speed select fast                  J4                 Open

      CPU speed select slow                  J4              pins 1 & 2
                                                               closed

      CPU speed select switchable            J4              pins 2 & 3
      from keyboard                                            closed

  »   NPU disabled                           W1              pins 2 & 3
                                                               closed

      NPU enabled                            W1              pins 1 & 2
                                                               closed

  »   Monitor type select                    W2              pins 1 & 2
      monochrome                                               closed

      Monitor type select color              W2              pins 2 & 3
                                                               closed

  »   Bus speed select CPU/2                SW1/7               Off

      Bus speed select CPU/4                SW1/7                On

              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

                DRAM SWITCH CONFIGURATION

   Size     SW1/1     SW1/2     SW1/3     SW1/4    SW1/8

   1MB       Off       On        On        On       Off

   2MB        On       Off       On        On       On

   4MB       Off       Off       Off       Off      Off

   5MB       Off       On        Off       On       Off

   8MB        On       On        On        Off      On

             DRAM WAIT STATE CONFIGURATION

  Wait state   Read state       SW1/5        SW1/6

      1             3            Off           On

      1             2            On           Off

      2             3            On            On