LEADING EDGE PRODUCTS, INC.

WINTOWER 486PC

Processor         80486SX/80486DX/80486DX2
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          UMC
Max. Onboard DRAM 64MB
Cache             64/128/256KB
BIOS              Phoenix
Dimensions        355mm x 304mm
I/O Options       32-bit VESA local bus slots (2), IDE interface, PS/2
                  mouse port
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                   Location     Purpose                Location

  IDE interface                CN1       32-bit VESA Local         S1
                                         bus slot

  PS/2 mouse style             CN2       32-bit VESA Local         S2
                                         bus slot

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not             JP1              N/A
      alter

  »   Factory configured - do not             JP6              N/A
      alter

  »   Parallel port interrupt select          JP3           pins 1 & 2
      IRQ7                                                    closed

      Parallel port interrupt select          JP3           pins 2 & 3
      IRQ5                                                    closed

  »   CMOS memory normal operation            JP4           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP4           pins 2 & 3
                                                              closed

             DRAM CONFIGURATION

     Size          Bank 0        Bank 1

      4MB        (1) 1M x 36      NONE

      8MB        (1) 1M x 36   (1) 1M x 36

     12MB        (1) 2M x 36   (1) 1M x 36

     16MB        (1) 2M x 36      NONE

     16MB        (1) 2M x 36   (1) 2M x 36

     16MB        (1) 4M x 36      NONE

     20MB        (1) 4M x 36      NONE

     32MB        (1) 4M x 36   (1) 4M x 36

     32MB        (1) 8M x 36      NONE

     36MB        (1) 1M x 36   (1) 8M x 36

     64MB        (1) 8M x 36   (1) 8M x 36

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8

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

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

                        CACHE JUMPER CONFIGURATION

    Size      SW1/switch 1    SW1/switch 2   SW1/switch 3    SW1/switch 4

    64KB          Off             Off            Off             Off

   128KB          Off             On             Off             On

   256KB           On             On              On             Off

                    CPU TYPE CONFIGURATION

             Type                           JP5

            80486SX                  pins 2 & 3 closed

            80486DX             pins 1 & 2 and 3 & 4 closed

           ODP486SX             pins 1 & 2 and 3 & 4 closed

           80486DX2             pins 1 & 2 and 3 & 4 closed

                   CPU SPEED CONFIGURATION

        Speed                JP8                  JP9

        25MHz          pins 1 & 2 closed   pins 1 & 2 closed

        33MHz          pins 2 & 3 closed   pins 2 & 3 closed

       50iMHz          pins 1 & 2 closed   pins 1 & 2 closed

       66iMHz          pins 2 & 3 closed   pins 2 & 3 closed

     VESA WAIT STATE/BUS SPEED CONFIGURATION

    CPU speed      Wait states          JP7

     £ 33MHz      0 wait states         Open

     > 33MHz       1 wait state        Closed