LEADING EDGE PRODUCTS, INC.

MODEL D4/MT

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

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Serial port                 CN1      IDE interface               CN5

  PS/2 mouse port             CN2      External battery            CN6

  Parallel port               CN3      CPU card slot               SL1

  Floppy drive interface      CN4      32-bit local bus slot       SL2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color               JP2             Closed

      Monitor type select monochrome          JP2              Open

  »   CMOS memory normal operation            JP3           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP3           pins 2 & 3
                                                              closed

  »   Standard local bus card                 JP4           pins 1 & 2
      installed                                               closed

      Standard local bus card not             JP4           pins 2 & 3
      installed                                               closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

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

      4MB         (4) 1M x 9         NONE

      5MB         (4) 1M x 9     (4) 256K x 9

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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 4M x 9     (4) 256K x 9

      20MB        (4) 4M x 9      (4) 1M x 9

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

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U30)      TAG (U41)

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

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

     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         On         Off         Off
                closed

   256KB       pins 2 & 3       On         On          On          On
                closed

[Image]

                          CPU TYPE CONFIGURATION

     CPU Type             JP1                JP2               JP3

      80486SX             Open            pins 1 & 2        pins 1 & 2
                                           closed             closed

      80486DX          pins 1 & 2         pins 2 & 3        pins 2 & 3
                         closed            closed             closed

     80486DX2          pins 1 & 2         pins 2 & 3        pins 2 & 3
                         closed            closed             closed