
LEADING EDGE PRODUCTS, INC.

MODEL D2

Processor         80286
Processor Speed   8/10MHz
Chip Set          Zymos
Max. onboard DRAM 1MB
Cache             None
BIOS              Leading Edge
Dimensions        330mm x 330mm
I/O Options       Floppy drive interface, parallel port, serial port
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Parallel port               CN1      Speaker                     CN4

  Serial port (25 pin)        CN2      Power LED & keylock         CN5

  Floppy drive interface      CN3      Keyboard connector          CN6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Floppy drive interface enabled           J7             Closed

      Floppy drive interface disabled          J7              Open

     Floppy drive interface address           J8            pins 2 & 3
      select primary                                          closed

      Floppy drive interface address           J8            pins 1 & 2
      select secondary                                        closed

     BIOS select 1 wait state                 J25           pins 2 & 3
                                                              closed

      BIOS select 0 wait states                J25           pins 1 & 2
                                                              closed

     CPU speed select 10MHz                   J26           pins 2 & 3
                                                              closed

      CPU speed select 8MHz                    J26           pins 1 & 2
                                                              closed

     Monitor type select monochrome           J27           pins 2 & 3
                                                              closed

      Monitor type select color                J27           pins 1 & 2
                                                              closed

     Factory configured - do not alter        J28           pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

    Size        Bank 0       Bank 1       Bank 2        J23        J24

    640KB      (16) 41256   (16) 4164      NONE       pins 2 &   pins 2 &
                                                         3          3

   1024KB      (16) 41256   (16) 41256     NONE       pins 2 &   pins 1 &
                                                         3          2

   1152KB      (16) 41256   (16) 4164    (16) 41256   pins 1 &   pins 2 &
                                                         2          3

  Note:Pins designated should be in the closed position.

                         SERIAL PORT CONFIGURATION

       COM1             COM2         IRQ          J5             J6

         COM1        Disabled        4       pins 1 & 2      pins 1 & 2
                                                closed         closed

          COM1        Disabled        3       pins 1 & 2      pins 2 & 3
                                                closed         closed

        Disabled        COM2          3       pins 2 & 3      pins 2 & 3
                                                closed         closed

        Disabled        COM2          4       pins 2 & 3      pins 1 & 2
                                                closed         closed

        Disabled      Disabled       N/A      pins 1, 2 &        N/A
                                               3 closed

                        PARALLEL PORT CONFIGURATION

       LPT1             LPT2         IRQ          J3             J4

         LPT1        Disabled        7       pins 1 & 2      pins 1 & 2
                                                closed         closed

          LPT1        Disabled        5       pins 2 & 3      pins 1 & 2
                                                closed         closed

        Disabled        LPT2          5       pins 2 & 3      pins 2 & 3
                                                closed         closed

        Disabled        LPT2          7       pins 1 & 2      pins 2 & 3
                                                closed         closed

        Disabled      Disabled       N/A         N/A         pins 1, 2, &
                                                              3 closed

