
UNIDENTIFIED

TOPCAT 386/486DX

Processor         80386DX/80486DX
Processor Speed   25/33MHz
Chip Set          Unidentified
Max. Onboard DRAM 64MB
Cache             None
BIOS              Unidentified
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80387DX/3167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Speaker                     JP31      Reset switch              JP65

  Power LED & keylock         JP42      Turbo switch              JP66

  External battery            JP60      Turbo LED                 JP67

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Pipeline mode disabled                  JP1              Open

      Pipeline mode enabled                   JP1             Closed

     Ready source type select NPX            jp2           pins 1 & 2
      ready                                                   closed

      Ready source type select 330            jp2           pins 2 & 3
      ready                                                   closed

     Clock speed control select              JP10          pins 1 & 2
      keyboard                                                closed

      Clock speed control select              JP10          pins 2 & 3
      external switch                                         closed

     Parity check disabled                   JP32             Open

      Parity check enabled                    JP32            Closed

      Monitor type select monochrome          JP41             Open

      Monitor type select color               JP41            Closed

     Battery type select internal            JP61          pins 1 & 2
                                                              closed

      Battery type select external            JP61          pins 2 & 3
                                                              closed

     Power good signal detect from           JP62          pins 1 & 2
      power supply                                            closed

      Power good signal detect from           JP62          pins 2 & 3
      board                                                   closed

     CMOS memory normal operation            JP68          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP68          pins 3 & 4
                                                              closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (4) 256K x 9      NONE           NONE           NONE

     2MB        (4) 256K x 9   (4) 256K x 9      NONE           NONE

     3MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9      NONE

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

     4MB        (4) 1M x 9        NONE           NONE           NONE

     5MB        (4) 256K x 9   (4) 1M x 9        NONE           NONE

     6MB        (4) 256K x 9   (4) 256K x 9   (4) 1M x 9        NONE

     8MB        (4) 1M x 9     (4) 1M x 9        NONE           NONE

     9MB        (4) 1M x 9     (4) 1M x 9     (4) 256K x 9      NONE

     10MB       (4) 256K x 9   (4) 256K x 9   (4) 1M x 9     (4) 1M x 9

     12MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9        NONE

     16MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     16MB       (4) 4M x 9        NONE           NONE           NONE

     17MB       (4) 256K x 9   (4) 4M x 9        NONE           NONE

     18MB       (4) 256K x 9   (4) 256K x 9   (4) 4M x 9        NONE

     20MB       (4) 1M x 9     (4) 4M x 9        NONE           NONE

     24MB       (4) 1M x 9     (4) 1M x 9     (4) 4M x 9        NONE

     32MB       (4) 4M x 9     (4) 4M x 9        NONE           NONE

     33MB       (4) 4M x 9     (4) 4M x 9     (4) 256K x 9      NONE

     34MB       (4) 256K x 9   (4) 256K x 9   (4) 4M x 9     (4) 4M x 9

     36MB       (4) 4M x 9     (4) 4M x 9     (4) 1M x 9        NONE

     40MB       (4) 1M x 9     (4) 1M x 9     (4) 4M x 9     (4) 4M x 9

     48MB       (4) 4M x 9     (4) 4M x 9     (4) 4M x 9        NONE

     64MB       (4) 4M x 9     (4) 4M x 9     (4) 4M x 9     (4) 4M x 9

                   CPU TYPE CONFIGURATION

   Type      JP81      JP83      JP84      JP85      JP86

  80386      Open      1 & 2     1 & 2     1 & 2     Open

  80486      1 & 2     2 & 3     2 & 3     2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

     BIOS CONFIGURATION

   Type     JP21      JP22

  27128     Open      Open

  27256     Open     Closed

  27512     Closed   Closed

