LEADING EDGE PRODUCTS, INC.

MODEL D (REVISION CC1/CC2)

Processor          8088 (exact location unknown)
Processor Speed    4.77/7.16MHz
Chip Set           Unknown
Max. Onboard DRAM  640KB
Cache              None
BIOS               Unknown
Dimensions         254mm x 218mm
I/O Options        Floppy drive interface, parallel port, serial port, VGA
                   port
NPU Options        8087

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Parallel port               J5       Keyboard                    J16

  Serial port                 J6       Speaker                     J17

  VGA port                    J7       Reset switch                J18

  Light pen port              J10      Power-on LED indicator      J19

  Floppy drive interface      J13

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch        Position

  »   Factory configured - do not            J8                 N/A
      alter

  »   Monitor enabled                        J9               Closed

      Monitor disabled                       J9                Open

  »   Factory configured - do not            J15               open
      alter

  »   Real time clock enabled                J15             pins 1 & 6
                                                              closed

      Real time clock disabled               J15             pins 2 & 7
                                                              closed

  »   Parallel port enabled                  J15             pins 2 & 7
                                                               open

      Parallel port disabled                 J15             pins 3 & 8
                                                              closed

  »   Floppy drive interface                 J15             pins 3 & 8
      enabled                                                  open

      Floppy drive interface                 J15             pins 4 & 9
      disabled                                                closed

  »   Serial port enabled                    J15             pins 4 & 9
                                                               open

      Serial port disabled                   J15            pins 5 & 10
                                                              closed

  »   Video mode TTL monochrome              SW1            pins 5 & 10
                                                               open

      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 J8 is unknown.

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1        Bank 2            J14

    512KB        (9) 4164       (9) 4164        NONE          pins 2 & 3
                                                               closed

    640KB       (9) 41256      (9) 41256      (9) 41128       pins 1 & 2
                                                               closed

  CPU SPEED CONFIGURARION

    Speed          SW3

   4.77MHz         Down

   7.16MHz          Up

               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                 J11

          2           pins 1 & 5 closed

          4           pins 2 & 6 closed

          5           pins 3 & 7 closed

          7           pins 4 & 8 closed