
LEADING EDGE PRODUCTS, INC.

MODEL D3/SX (VERSION 1)

Processor             80386SX
Processor Speed       16MHz
Chip Set              Zymos
Max. onboard DRAM     4MB
Cache                 None
BIOS                  Leading Edge
Dimensions            325mm x 308mm
I/O Options           Floppy drive interface, mouse port, parallel port,
                      serial ports (2)
NPU Options           80387SX

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                    Location

  Mouse port                CN1       Parallel port                CN4

  Serial port 2             CN2       Floppy drive interface       CN5

  Serial port 1             CN3

                        USER CONFIGURABLE SETTINGS

              Function                   Jumper            Position

     Floppy drive interface              J19          pins 2 & 3 closed
      enabled

      Floppy drive interface              J19          pins 1 & 2 closed
      disabled

     Monitor type select color           J26          pins 2 & 3 closed

      Monitor type select                 J26          pins 1 & 2 closed
      monochrome

                            DRAM CONFIGURATION

     Size          Bank 0          Bank 1          J22           J23

     512KB       (2) 256K x 9       None       pins 2 & 3     pins 2 & 3

      1MB        (2) 256K x 9   (2) 256K x 9   pins 1 & 2     pins 2 & 3

      2MB        (2) 1M x 9         NONE       pins 2 & 3     pins 1 & 2

      4MB        (2) 1M x 9      (2) 1M x 9    pins 1 & 2     pins 1 & 2

  Note:Pins designated should be in the closed position.

                        PARALLEL PORT CONFIGURATION

         IRQ                ADDRESS            J17              J20

            7               378h           pins 2 & 3       pins 2 & 3
                                             closed           closed

             5               378h           pins 2 & 3       pins 1 & 2
                                             closed           closed

             7               278h           pins 1 & 2       pins 2 & 3
                                             closed           closed

             5               278h           pins 1 & 2       pins 1 & 2
                                             closed           closed

         Disabled          Disabled           Open             Open

                         SERIAL PORT CONFIGURATION

        Port 1              Port 2             J16              J18

          COM1              COM2           pins 1 & 2       pins 1 & 2
                                             closed           closed

           COM1              COM4           pins 2 & 3       pins 1 & 2
                                             closed           closed

           COM1            Disabled           Open           pins 1 & 2
                                                              closed

           COM3              COM2           pins 1 & 2       pins 2 & 3
                                             closed           closed

         Disabled            COM2           pins 1 & 2         Open
                                             closed

           COM3              COM4           pins 2 & 3       pins 2 & 3
                                             closed           closed

         Disabled            COM4           pins 2 & 3         Open
                                             closed

         Disabled          Disabled           Open             Open

                           MOUSE PORT INTERRUPTS

       IRQ            J11            J12           J13           J14

        IRQ9        Closed         Open          Open           Open

         IRQ3         Open         Closed         Open           Open

         IRQ4         Open          Open         Closed          Open

         IRQ5         Open          Open          Open          Closed

