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R486 VLQMBC

Processor         80486SX/80486DX/80486DX2
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          ALI
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit VESA local bus slots (2)
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Power LED & keylock         J1       Reset switch                J5

  Speaker                     J2       External battery           JP17

  Turbo switch                J3       32-bit VESA Local bus   SL1 & SL2
                                       slots

  Turbo LED                   J4

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color               JP12            Closed

      Monitor type select monochrome          JP12             Open

  »   CMOS memory normal operation            JP16          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP16          pins 2 & 3
                                                              closed

  »   Factory configured - do not             JP33          pins 2 & 4
      alter                                                   closed

  »   Weitek Power 9000 VLB card not          JP89            Closed
      installed

      Weitek Power 9000 VLB card              JP89             Open
      installed

  »   Factory configured - do not             JP94          pins 1 & 2
      alter                                                   closed

  Note: The location of JP94 is unidentified.

              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

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

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

                    CACHE CONFIGURATION

     Size         U6 to U9      U10 to U13        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                 JP7                  JP8

        64KB           pins 2 & 3 closed   pins 2 & 4 closed

        128KB          pins 1 & 2 closed   pins 2 & 3 closed

        256KB          pins 1 & 2 closed   pins 1 & 2 closed

                          CPU SPEED CONFIGURATION

   Speed        JP2          JP3       JP4       ID2      ID3      JP72

   25MHz     Pins 2 & 3     Open       Open    Closed    Open     Closed
              closed

   33MHz     Pins 2 & 3     Open       Open    Closed    Open      Open
   (SX)       closed

   33MHz      Pins 1 &     Pins 2 &    Open    Closed    Open      Open
              2, 3 & 4    3 closed
              closed

  50iMHz     Pins 2 & 3     Open       Open    Closed    Open     Closed
              closed

  66iMHz      Pins 1 &     Pins 2 &    Open    Closed    Open      Open
              2, 3 & 4    3 closed
              closed