UNIDENTIFIED

486VL.I

Processor      80486SX/80487SX/80487SX2/80486DX/80486DX2/Pentium Overdrive
Processor      20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set       SIS
Max. Onboard   32MB
DRAM
Cache          64/128/256KB
BIOS           AMI
Dimensions     254mm x 218mm
I/O Options    32-bit VESA local bus slots (2)
NPU Options    None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  External battery           JP1       Speaker                    JP17

  Reset switch               JP14      Power LED & keylock        JP18

  Turbo switch               JP15      32-bit VESA local bus   SL1 & SL2
                                       slots

  Turbo LED                  JP16

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not              J1              N/A
      alter

  »   Factory configured - do not             JP2              N/A
      alter

  »   Factory configured - do not             JP11             N/A
      alter

              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

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

      16MB        (4) 4M x 9         NONE

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

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

                    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                 JP12                 JP13

        64KB                 Open                 Open

        128KB               Closed         pins 1 & 2 closed

        256KB               Closed         pins 2 & 3 closed

                          CPU TYPE CONFIGURATION

      Type              JP9           JP10          JP22         JP23

  80486SX (PQFP)   pins 1 & 2, 3    pins 1 & 2     Closed        Open
                    & 4 closed       closed

     80486SX         pins 2 & 3       Open          Open        Closed
                      closed

     80487SX       pins 1 & 2, 3    pins 2 & 3      Open        Closed
                    & 4 closed       closed

     80486DX       pins 1 & 2, 3    pins 1 & 2      Open        Closed
                    & 4 closed       closed

    80486DX2       pins 1 & 2, 3    pins 1 & 2      Open        Closed
                    & 4 closed       closed

     Pentium       pins 1 & 2, 3    pins 2 & 3      Open        Closed
    Overdrive       & 4 closed       closed

         CPU SPEED CONFIGURATION

  Speed      JP6        JP7       JP8

  20MHz      Open     Closed    Closed

  25MHz     Closed     Open     Closed

  33MHz     Closed    Closed     Open

  40MHz      Open      Open     Closed

  50iMHz    Closed     Open     Closed

  50MHz      Open     Closed     Open

  66iMHz    Closed    Closed     Open

  VESA WAIT STATE CONFIGURATION

   Wait states         JP19

  0 wait states        Open

  1 wait state        Closed

  BUS SPEED CONFIGURATION

  CPU speed        JP20

   <= 33MHz        Open

   > 33MHz        Closed