UNIDENTIFIED

S486V

Processor        80486SX/80487SX/80486DX/80486DX2
Processor Speed  20/25/33/40/50(internal)/50/66(internal)/80(internal)MHz
Chip Set         SIS
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             Unidentified
Dimensions       254mm x 218mm
I/O Options      32-bit VESA local bus slots (3)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Speaker                    JP13      External battery           JP22

  Turbo LED                  JP14      Reset switch               JP24

  Turbo switch               JP15      32-bit VESA local bus   SL1 - SL3
                                       slots

  Power LED & keylock        JP19

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

      Monitor type select color               JP20            Closed

      Monitor type select monochrome          JP20             Open

  »   CMOS memory normal operation            JP21          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP21          pins 2 & 3
                                                              closed

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       1MB        (1) 256K x 36         NONE

       2MB        (1) 256K x 36    (1) 256K x 36

       2MB        (1) 512K x 36         NONE

       4MB        (1) 512K x 36    (1) 512K x 36

       4MB         (1) 1M x 36          NONE

       6MB        (1) 512K x 36     (1) 1M x 36

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

       8MB         (1) 2M x 36          NONE

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

      16MB         (1) 4M x 36          NONE

      18MB        (1) 512K x 36     (1) 4M x 36

      20MB         (1) 1M x 36      (1) 4M x 36

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

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U11)      TAG (U60)

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

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

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

                        CACHE JUMPER CONFIGURATION

   Size      JP8      JP9     JP10      JP11     JP12      JP61     JP86

   64KB      2 & 3   2 & 3    2 & 3    2 & 3     2 & 3    2 & 3     2 & 3

   128KB     2 & 3   1 & 2    1 & 2    1 & 2     2 & 3    1 & 2     2 & 3

   256KB     1 & 2   1 & 2    2 & 3     Open     1 & 2    1 & 2     1 & 2

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

       Type               JP2               JP3                JP4

      80486SX             Open           pins 2 & 3            Open
                                           closed

      80487SX            Closed          pins 1 & 2         pins 2 & 3
                                           closed             closed

      80486DX            Closed          pins 1 & 2         pins 1 & 2
                                           closed             closed

     80486DX2            Closed          pins 1 & 2         pins 1 & 2
                                           closed             closed

         CPU SPEED CONFIGURATION

  Speed      JP16      JP17      JP18

  20MHz      Open      Open      Open

  25MHz     Closed     Open      Open

  33MHz     Closed    Closed    Closed

  40MHz     Closed    Closed     Open

  50MHz      Open      Open     Closed

  50iMHz    Closed     Open      Open

  66iMHz    Closed     Open     Closed

  80iMHz     Open     Closed    Closed

                  VL BUS SPEED CONFIGURATION

      CPU speed              JP25                 JP26

      <= 33MHz         pins 1 & 2 closed   pins 1 & 2 closed

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