
LEADING EDGE PRODUCTS, INC.

MODEL D (REVISION 7)

Processor            8088 (exact location unknown)
Processor Speed      4.77MHz
Chip Set             Unknown
Max. Onboard DRAM    768KB
Cache                None
BIOS                 Unknown
Dimensions           254mm x 218mm
I/O Options          Color monitor port, floppy drive interface, light pen
                     connector,

                     monochrome monitor port, parallel port, serial port
NPU Options          8087

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Parallel port               J6       Floppy drive interface      J15

  Serial port                 J7       Keyboard                    J18

  Color monitor port          J8       Speaker                     J19

  Monochrome port             J9       Reset switch                J20

  Light pen connector         J11      Power-on LED indicator      J21

                        USER CONFIGURABLE SETTINGS

               Function                     Jumper           Position

     Factory configured - do not             J5                N/A
      alter

     Monitor enabled                         J10             Closed

      Monitor disabled                        J10              Open

     Floppy drive interface enabled          J13            pins 4 & 9
                                                              closed

      Floppy drive interface                  J13         pins 4 & 9 open
      disabled

     Serial port enabled                     J13           pins 5 & 10
                                                              closed

      Serial port disabled                    J13           pins 5 & 10
                                                               open

     Parallel port enabled                   J13            pins 3 & 8
                                                              closed

      Parallel port disabled                  J13         pins 3 & 8 open

     Real Time Clock enabled                 J13            pins 2 & 7
                                                              closed

      Real Time Clock disabled                J13         pins 2 & 7 open

     Factory configured - do not             J13         pins 1 & 6 open
      alter

     BIOS ROM type 8/16K                     J16              Open

      BIOS ROM type 32K                       J16             Closed

     Video mode TTL mononchrome              SW1               Up

      Video mode CGA                          SW1              Down

     Factory configured - do not        SW2/switch 1           Off
      alter

     NPU disabled                       SW2/switch 2           On

      NPU enabled                        SW2/switch 2           Off

     Factory configured - do not        SW2/switch 3           On
      alter

     Memory test 64KB                   SW2/switch 4           On

      Memory test all                    SW2/switch 4           Off

     Factory configured - do not        SW2/switch 5           Off
      alter

     Factory configured - do not        SW2/switch 6           Off
      alter

  Note:The exact location of J5 is unknown.

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1        Bank 2            J23

    512KB       (9) 41256      (9) 41256        NONE          pins 1 & 2
                                                               closed

    768KB       (9) 41256      (9) 41256      (9) 41256       pins 3 & 4
                                                               closed

  Note:Even though this system has 768KB installed, only 640KB is
  available to the user.

               FLOPPY DISK DRIVES INSTALLED

  Number of Drives     SW2/switch 7        SW2/switch 8

         1                  On                  On

         2                  Off                 On

         3                  On                  Off

         4                  Off                 Off

     REAL TIME CLOCK INTERRUPT SELECT

         IRQ                 J12

          2           pins 1 & 5 closed

          4           pins 2 & 6 closed

          5           pins 3 & 7 closed

          7           pins 4 & 8 closed

