YOUTH KEEP ENTERPRISES, LTD.

502 386DX

Processor         80386DX
Processor Speed   33MHz
Chip Set          Unidentified
Max. Onboard DRAM 8MB
Cache             64/256KB
BIOS              Unidentified
Dimensions        355mm x 304mm
I/O Options       32-bit external memory card slot
NPU Options       80387/3167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Power LED & keylock        J1        Turbo LED                   J5

  Speaker                    J2        External battery            J6

  Turbo switch               J3        32-bit external             S1
                                       memory card

  Reset switch               J4

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

  »   Monitor type select color                JP10          pins 1 & 2
                                                              closed

      Monitor type select monochrome           JP10          pins 2 & 3
                                                              closed

  »   NPU disabled                             JP13          pins 2 & 3
                                                              closed

      NPU enabled                              JP13          pins 1 & 2
                                                              closed

  »   NPU mode select asynchronous with        JP14          pins 1 & 2
      CPU                                                     closed

      NPU mode select synchronous with         JP14          pins 2 & 3
      CPU                                                     closed

  »   CPU speed select fast                    JP15          pins 1 & 2
                                                              closed

      CPU speed select slow                    JP15          pins 2 & 3
                                                              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) 256K x 9     (4) 1M x 9

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

                         DRAM JUMPER CONFIGURATION

  Size    JP1       JP2      JP3      JP4      JP5   JP6     JP7     JP8

  1MB    Closed    Closed   Closed   Closed    2 &   Open    Open   Open
                                               3

  2MB    Closed    Closed   Closed   Closed    2 &    2 &    Open   Open
                                               3      3

  4MB    Closed    Closed    Open     Open     1 &   Open    Open   Open
                                               2

  5MB    Closed    Open     Closed   Closed    2 &    1 &    Open   Open
                                               3      2

  8MB    Closed    Open      Open    Closed    1 &    1 &    Open   Open
                                               2      2

  Note:Pins designated should be in the closed position.

              CACHE CONFIGURATION

      Size          Bank 0           TAG

      64KB        (8) 64K x 1    (2) 64K x 1

     256KB        (8) 256K x 1   (2) 256K x 1