
DTK COMPUTER, INC.

PEM-2561D (S)

Processor            80386DX
Processor Speed      25MHz
Chip Set             DTK/SIS
Max. Onboard DRAM    16MB
Cache                None
BIOS                 DTK
Dimensions           330mm x 218mm
I/O Options          Parallel port, serial ports (2), floppy drive
                     interface, IDE interface
NPU Options          80387/3167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Power LED & keylock         J1       Floppy drive interface      J7

  IDE interface LED           J2       Serial port 1               J9

  Turbo LED                   J4       Serial port 2               J8

  Reset switch                J5       Parallel port               J10

  IDE interface               J6       Riser card                  RC1

                        USER CONFIGURABLE SETTINGS

                Function                   Jumper/Switch       Position

     CPU speed select fast                     J3               Open

      CPU speed select slow                     J3            pins 1 & 2
                                                                closed

      CPU speed switchable from                 J3            pins 2 & 3
      keyboard                                                  closed

     Bus speed select fast                    SW1/7             Off

      Bus speed select slow                    SW1/7              On

     DRAM page mode/page-interleave           SW1/8              On
      select auto

      DRAM page mode/page-interleave           SW1/8             Off
      mode select page

     Parallel port interrupt select            W1            pins 1 & 2
      IRQ7                                                      closed

      Parallel port interrupt select            W1            pins 2 & 3
      IRQ5                                                      closed

     NPU disabled                              W2            pins 1 & 2
                                                                closed

      NPU enabled                               W2            pins 2 & 3
                                                                closed

     Serial port 1 interrupt select            W3            pins 2 & 3
      IRQ4                                                      closed

      Serial port 1 interrupt select            W3            pins 1 & 2
      IRQ3                                                      closed

     Serial port 2 interrupt select            W4            pins 1 & 2
      IRQ3                                                      closed

      Serial port 2 interrupt select            W4            pins 2 & 3
      IRQ4                                                      closed

     Floppy drive interface enabled            W5              Closed

      Floppy drive interface disabled           W5               Open

     IDE interface disabled                    W12              Open

      IDE interface enabled                     W12             Closed

     Monitor type select monochrome            W13           pins 1 & 2
                                                                closed

      Monitor type select color                 W13           pins 2 & 3
                                                                closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (1) 256K x        NONE           NONE           NONE
                    36

     2MB        (1) 256K x     (1) 256K x        NONE           NONE
                    36             36

     3MB        (1) 256K x     (1) 256K x     (1) 256K x        NONE
                    36             36             36

     4MB        (1) 256K x     (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

     4MB       (1) 1M x 36        NONE           NONE           NONE

     5MB       (1) 1M x 36     (1) 256K x        NONE           NONE
                                   36

     6MB        (1) 256K x     (1) 256K x    (1) 1M x 36        NONE
                    36             36

     7MB        (1) 256K x     (1) 256K x    (1) 1M x 36    (1) 256K x 36
                    36             36

     8MB       (1) 1M x 36    (1) 1M x 36        NONE           NONE

     9MB       (1) 1M x 36    (1) 1M x 36     (1) 256K x        NONE
                                                  36

     10MB      (1) 1M x 36    (1) 1M x 36     (1) 256K x    (1) 256K x 36
                                                  36

     12MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36        NONE

     13MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

     16MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

         DRAM SWITCH CONFIGURATION

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

  1MB      Off      On       On       On

  2MB       On      Off      On       On

  3MB      Off      Off      On       On

  4MB       On      On       Off      On

  4MB      Off      Off      Off      Off

  5MB      Off      On       Off      On

  6MB       On      Off      Off      On

  7MB      Off      Off      Off      On

  8MB       On      On       On       Off

  9MB      Off      On       On       Off

  10MB      On      Off      On       Off

  12MB      On      On       Off      Off

  13MB     Off      On       Off      Off

  16MB      On      On       On       On

             DRAM WAIT STATE CONFIGURATION

  Wait state   Read state       SW1/5        SW1/6

      1             2            On           Off

      1             3            Off           On

      2             3            On            On

    PARALLEL PORT CONFIGURATION

  Setting       W6          W7

    LPT1      Closed      Closed

    LPT2       Open        Open

  Disabled     Open       Closed

  Disabled    Closed       Open

    SERIAL PORT 1 CONFIGURATION

  Setting       W6          W7

    COM1      Closed      Closed

    COM3       Open        Open

  Disabled     Open       Closed

  Disabled    Closed       Open

    SERIAL PORT 2 CONFIGURATION

  Setting       W6          W7

    COM2      Closed      Closed

    COM4       Open        Open

  Disabled     Open       Closed

  Disabled    Closed       Open

