QUICKPATH SYSTEMS, INC.

486SX/DX MOTHERBOARD

Processor              80486SX/80487SX/80486DX/80486DX2
Processor Speed        16/20/25/33/50(internal)/50/66(internal)MHz
Chip Set               OPTI
Max. Onboard DRAM      32MB
Cache                  64/256KB
BIOS                   MR
Dimensions             330mm x 218mm
I/O Options            None
NPU Options            4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Power LED & keylock         KEY       Speaker                    SPK

  Turbo LED                   LED       Turbo switch               TSW

  Reset switch                RST

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Bus speed select ATCLK/4                JP2              Open

      Bus speed select ATCLK/6                JP2             Closed

  »   Password check enabled                  JP6             Closed

      Password check disabled                 JP6              Open

  »   CMOS memory normal operation            JP7           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP7           pins 1 & 2
                                                              closed

  »   Battery type select internal            JP13          pins 1 & 2
                                                              closed

      Battery type select external            JP13          pins 2 & 3
                                                              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) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

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

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

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

     CACHE CONFIGURATION

     Size          Bank 0

     64KB        (9) 8K x 8

     256KB      (9) 32K x 8

           CACHE JUMPER CONFIGURATION

   Size      JP9      JP10      JP11      JP12

   64KB     Open      Open      Open      Open

  256KB    Closed    Closed     Open     Closed

                             CPU CONFIGURATION

       Type           OSC1       JP1       JP3         JP4         JP5

  80486SX-16MHz      32MHz      2 & 3     2 & 3       Open         Open

  80486SX-20MHz      40MHz      2 & 3     2 & 3       Open         Open

  80486SX-25MHz      50MHz      2 & 3     2 & 3       Open         Open

  80487SX-20MHz      40MHz      2 & 3     1 & 2      Closed       1 & 2

  80486DX-25MHz      50MHz      2 & 3     1 & 2      Closed       2 & 3

  80486DX-33MHz      66MHz      2 & 3     1 & 2      Closed       2 & 3

  80486DX-50MHz      50MHz      1 & 2     1 & 2      Closed       2 & 3

  80486DX2-50MHz     25MHz      2 & 3     1 & 2      Closed       2 & 3

  80486DX2-66MHz     33MHz      2 & 3     1 & 2      Closed       2 & 3

  Note:Pins designated should be in the closed position.