
LEADING EDGE PRODUCTS, INC.

MODEL D3/SX (VERSION 2)

Processor             80386SX
Processor Speed       16MHz
Chip Set              Zymos
Max. onboard DRAM     4MB
SRAM 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 1 (25         CN2       Floppy drive interface       CN5
  pin)

  Serial port 2 (9 pin)     CN3

                        USER CONFIGURABLE SETTINGS

              Function                   JUMPER            Position

     Monitor type select color            J5          pins 1 & 2 closed

      Monitor type select                  J5          pins 2 & 3 closed
      monochrome

     Floppy drive interface               J9          pins 2 & 3 closed
      enabled

      Floppy drive interface               J9          pins 1 & 2 closed
      disabled

     Mouse port enabled                  J15          pins 1 & 2 closed

      Mouse port disabled                 J15          pins 2 & 3 closed

                            DRAM CONFIGURATION

    Size        Bank 0       Bank 1        J6          J7          J8

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

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

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

     4MB       (2) 1M x 9  (2) 1M x 9    pins 2 &    pins 1 &    pins 1 &
                                            3           2           2

  Note:Pins designated should be in the closed position.

                        PARALLEL PORT CONFIGURATION

        IRQ              ADDRESS             J10               J11

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

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

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

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

     Disabled           Disabled            Open               Open

                         SERIAL PORT CONFIGURATION

  Port 1 (25 pine)   Port 2 (9 pin)          J12               J13

       COM1               COM2            pins 2 & 3        pins 2 & 3
                                           closed             closed

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

       COM1             Disabled          pins 2 & 3           Open
                                           closed

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

     Disabled             COM2              Open            pins 2 & 3
                                                              closed

       COM3               COM4            pins 1 & 2        pins 1 & 2
                                           closed             closed

     Disabled             COM4              Open            pins 1 & 2
                                                              closed

     Disabled           Disabled            Open               Open

         MOUSE CONFIGURATION

     IRQ       J16 - J18      J19

      3          Open        Open

      4          Open        Open

      5          Open        Open

      9          Open       Closed

