
DTK COMPUTER, INC.

PEM-2501/PEM-4001

Processor          80386DX
Processor Speed    25/33/40MHz
Chip Set           VLSI
Max. Onboard DRAM  16MB (8MB on external memory card)
Cache              64/256KB
BIOS               AMI/DTK
Dimensions         351mm x 306mm
I/O Options        32-bit external memory card slot (PEI-306)
NPU Options        80387/3167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Power LED & keylock        J1        Speaker                     J4

  Turbo LED                  J2        32-bit external             S1
                                       memory card

  Reset switch               J3        Turbo switch                W6

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     NPU disabled                           W1                Closed

      NPU enabled                            W1                 Open

     CPU speed select fast                  W6                 Open

      CPU speed select slow                  W6              pins 1 & 2
                                                               closed

      CPU speed switchable from              W6              pins 2 & 3
      keyboard                                                 closed

     BIOS type select 27256                 W7              pins 1 & 2
                                                               closed

      BIOS type select 27512                 W7              pins 2 & 3
                                                               closed

     DMA speed select 8MHz                  W8                Closed

      DMA speed select 6MHz                  W8                 Open

     Monitor type select                   SW1/6               Off
      monochrome

      Monitor type select color             SW1/6                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 JUMPER CONFIGURATION

  Size   SW1/1    SW1/2    SW1/3   SW1/4    SW1/5       W2         W3

  1MB      On      On       On       On       On     pins 2 &    pins 2 &
                                                     3 closed   3 closed

  2MB      On      On       On       On       On     pins 2 &    pins 2 &
                                                     3 closed   3 closed

  4MB      On      On       Off      On      Off     pins 1 &    pins 1 &
                                                     2 closed   2 closed

  5MB     Off      On       Off     Off       On     pins 2 &    pins 1 &
                                                     3 closed   2 closed

  8MB     Off      On       Off     Off      Off     pins 1 &    pins 1 &
                                                     2 closed   2 closed

  12MB    Off      Off      On      N/A      N/A       N/A         N/A

  16MB    Off      Off      Off     N/A      N/A       N/A         N/A

            CACHE CONFIGURATION

     Size          Bank 0          Tag

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

     256KB       (8) 64K x 4   (2) 64K x 4

                  CACHE JUMPER CONFIGURATION

        Size                  W4                   W5

        64KB           pins 1 & 2 closed   pins 1 & 2 closed

        256KB          pins 2 & 3 closed   pins 2 & 3 closed

