LEADING EDGE PRODUCTS, INC.

MODEL D4 PLUS

Processor         80486SX/80487SX/80486DX/80486DX2
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          Unidentified
Max. Onboard DRAM 32MB
Cache             64/128/256KB (on CPU card)
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       External CPU card, floppy drive interface, IDE interface,
                  parallel port, PS/2 mouse port, serial ports (2)
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  PS/2 mouse port            CN1      Floppy drive interface       CN6

  Serial port 1              CN3      IDE interface                CN7

  Serial port 2              CN4      CPU card slot                SL1

  Parallel port              CN5

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color               JP1             Closed

      Monitor type select monochrome          JP1              Open

  »   Parallel port enabled (printer)         JP2              Open

      Parallel port disabled                  JP2             Closed

  »   CMOS memory normal operation            JP3           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP3           pins 2 & 3
                                                              closed

  »   Standard local bus card                 JP5           pins 1 & 2
      installed                                               closed

      Standard local bus card not             JP5           pins 2 & 3
      installed                                               closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      32MB        (4) 4M x 9      (4) 4M x 9

[Image]

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U12)      TAG (U13)

     64KB        (4) 8K x 8     (4) 8K x 8       NONE        (1) 8K x 8

     128KB      (4) 32K x 8        NONE          NONE        (1) 8K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 8K x 8     (1) 8K x 8

                     CACHE JUMPER/SWITCH CONFIGURATION

    Size          JP1         SW1/1       SW1/2       SW1/3       SW1/4

    64KB       pins 2 & 3      Off         Off         Off         Off
                closed

   128KB       pins 1 & 2       On         Off         Off         On
                closed

   256KB       pins 2 & 3       On         On          Off         On
                closed

                        CPU TYPE CONFIGURATION

               Type                               JP3

              80486SX                      pins 5 & 6 closed

              80487SX               pins 2 & 3, 4 & 5, 6 & 7 closed

              80486DX               pins 1 & 2, 4 & 5, 6 & 7 closed

             80486DX2               pins 1 & 2, 4 & 5, 6 & 7 closed