
J-MARK COMPUTER CORPORATION

JET-286V

Processor         80286
Processor Speed   16/20MHz
Chip Set          VLSI SCAMP
Max. Onboard DRAM 16MB
Cache             None
BIOS              Award
Dimensions        254mm x 220mm
I/O Options       None
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Speaker                     J5       Power LED & keylock         J10

  External battery            J8       Turbo LED                   J13

  Turbo switch                J7       Reset switch                J15

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     NPU mode select synchronous with         JP2           pins 1 & 2
      CPU                                                     closed

      NPU mode select synchronous with         JP2           pins 2 & 3
      oscillator installed at OSC1                            closed

     Battery type select internal             JP7           pins 2 & 3
                                                              closed

      Battery type select external             JP7           pins 1 & 2
                                                              closed

     Monitor type select color                JP11           Closed

      Monitor type select monochrome           JP11            Open

                            DRAM CONFIGURATION

   Size     Bank 0       P-0      Bank 1       P-1      Bank 2    Bank 3

  512KB       (4)        (2)       NONE       NONE       NONE      NONE
             44256      41256

  512KB      NONE       NONE       NONE       NONE        (2)      NONE
                                                        256K x
                                                          9

   1MB        (4)        (2)        (4)        (2)       NONE      NONE
             44256      41256      44256      41256

   1MB       NONE       NONE       NONE       NONE        (2)       (2)
                                                        256K x     256K x
                                                          9          9

   2MB        (4)        (2)        (4)        (2)        (2)       (2)
             44256      41256      44256      41256     256K x     256K x
                                                          9          9

   2MB       NONE       NONE       NONE       NONE      (1) 1M     NONE
                                                         x 9

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

                  DRAM JUMPER CONFIGURATION

        Size                 JP3                  JP4

        512KB          pins 2 & 3 closed   pins 2 & 3 closed

        512KB          pins 1 & 2 closed   pins 1 & 2 closed

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

         1MB           pins 1 & 2 closed   pins 1 & 2 closed

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

         2MB           pins 1 & 2 closed   pins 1 & 2 closed

         4MB           pins 1 & 2 closed   pins 1 & 2 closed

