UNIDENTIFIED

486-VL BUS ANTI-VIRUS

Processor        80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed  25/33/40/50(internal)/50/66(internal)MHz
Chip Set         OPTi
Max. Onboard DRAM32MB
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            J1        Turbo switch              JP28

  Power LED & keylock         J5        32-bit VESA Local bus      S1
                                        slot

  Speaker                     J6        32-bit VESA Local bus      S2
                                        slot

  Turbo LED                  JP24       Reset switch              SW1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color               JP1             Closed

      Monitor type select monochrome          JP1              Open

  »   Factory configured - do not             JP32          pins 2 & 3
      alter                                                   closed

  »   ADS # signal delay enabled              JP40          pins 2 & 3
                                                              closed

      ADS # signal delay disabled             JP40          pins 1 & 2
                                                              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) 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) 16K x 8/(1)
                                                            32K x 8

  Note:The exact locations of Bank 0 and Bank 1 are unknown.

                        CACHE JUMPER CONFIGURATION

    Size           JP7            JP9            JP15           JP22

    64KB        pins 2 & 3        Open           Open           Open
                 closed

    128KB       pins 1 & 2       Closed         Closed          Open
                 closed

    256KB       pins 2 & 3       Closed         Closed         Closed
                 closed

  Note:The exact locations of Bank 0 and Bank 1 are unknown.

                          CPU TYPE CONFIGURATION

           Type                     JP11                    JP12

          80486SX                   Open              pins 2 & 3 closed

          80487SX             pins 2 & 3 closed      pins 1 & 2 and 3 & 4
                                                           closed

          80486DX             pins 1 & 2 closed      pins 1 & 2 and 3 & 4
                                                           closed

         80486DX2             pins 1 & 2 closed      pins 1 & 2 and 3 & 4
                                                           closed

     Pentium Overdrive        pins 2 & 3 closed      pins 1 & 2 and 3 & 4
                                                           closed

                          CPU SPEED CONFIGURATION

      Speed             JP10               JP16                JP23

      25MHz             Open             pins 2 & 3           Closed
                                          closed

      33MHz            Closed            pins 2 & 3            Open
                                          closed

      40MHz             Open             pins 2 & 3            Open
                                          closed

     50i MHz            Open             pins 2 & 3           Closed
                                          closed

      50MHz             Open             pins 1 & 2           Closed
                                          closed

     66i MHz           Closed            pins 2 & 3            Open
                                          closed

              VESA WAIT STATE/BUS SPEED CONFIGURATION

    CPU speed      Wait states          J20              J21

     < 33MHz      0 wait states        Closed          Closed

     > 33MHz       1 wait state         Open            Open

                     VL-BUS MASTER/SLAVE CONFIGURATION

           Setting                     JP13                   JP18

  »         Slave mode                Closed                  Open

          Master & slave              Closed                  Open

  Note:For VL-Bus device to support both master and slave mode, an
  additional PAL must be inserted in U43

                      VL-BUS SETUP MODE CONFIGURATION

          Setting                    JP29                    JP39

  »         Setup 0           pins 1 & 2 closed       pins 1 & 2 closed

            Setup 1           pins 1 & 2 closed       pins 2 & 3 closed

            Setup 2           pins 2 & 3 closed       pins 2 & 3 closed