
PC WARE INTERNATIONAL, INC.

MB-U498WB

Processor  UMC U5/80486SX/AM486DX/80486DX/CX486DX2(M7)/AM486DX2/
           80486DX2/SL80486DX2/AM486DX4/SL80486DX4/P24D/P24T/ CX5X86
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed      100(internal)/120(internal)MHz
Chip Set   OPTI
Video Chip None
Set
Maximum    64MB
Onboard
Memory
Maximum    None
Video
Memory
Cache      64/128/256/512/1024KB
BIOS       AMI
Dimensions 254mm x 218mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  External battery          JP1       Reset switch                JP20

  Power LED & keylock       JP15      Turbo switch                JP22

  Speaker                   JP18      Green PC connector          JP23

  Turbo LED                 JP19      32-bit VESA local bus    SL1 - SL3
                                      slots

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

      Battery type select internal          JP1             Closed

      Battery type select external          JP1        Pins 2 & 3 closed

      CMOS memory clear                     JP1        Pins 3 & 4 closed

     Factory configured - do not           JP2              Open
      alter

      Flash BIOS voltage select 12v         JP3        Pins 2 & 3 closed

      Flash BIOS voltage select 5v          JP3        Pins 1 & 2 closed

     Factory configured - do not          JP36          Unidentified
      alter

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       1MB        (1) 256K x 36         None            None

       1MB             None        (1) 256K x 36        None

       2MB        (1) 256K x 36    (1) 256K x 36        None

       2MB             None        (1) 256K x 36    (4) 256K x 9

       3MB        (1) 256K x 36    (1) 256K x 36    (4) 256K x 9

       4MB         (1) 1M x 36          None            None

       4MB             None         (1) 1M x 36         None

       5MB         (1) 1M x 36     (1) 256K x 36        None

       6MB        (1) 256K x 36    (1) 256K x 36     (1) 1M x 9

       6MB         (1) 1M x 36     (1) 256K x 36    (4) 256K x 9

       8MB         (1) 2M x 36          None            None

       8MB         (1) 1M x 36      (1) 1M x 36         None

       9MB         (1) 2M x 36     (1) 256K x 36        None

       9MB         (1) 1M x 36     (1) 256K x 36     (1) 1M x 9

       9MB         (1) 1M x 36      (1) 1M x 36     (4) 256K x 9

      12MB         (1) 2M x 36      (1) 1M x 36         None

      12MB         (1) 1M x 36      (1) 1M x 36      (1) 1M x 9

      16MB         (1) 4M x 36          None            None

      16MB             None         (1) 4M x 36         None

      17MB         (1) 4M x 36     (1) 256K x 36        None

      18MB         (1) 4M x 36     (1) 256K x 36    (4) 256K x 9

      20MB         (1) 4M x 36      (1) 1M x 36         None

      21MB         (1) 1M x 36     (1) 256K x 36     (1) 4M x 9

      21MB         (1) 4M x 36     (1) 256K x 36     (1) 1M x 9

      21MB         (1) 4M x 36      (1) 1M x 36     (4) 256K x 9

      24MB         (1) 2M x 36      (1) 4M x 36         None

      24MB         (1) 4M x 36      (1) 1M x 36      (1) 1M x 9

      25MB         (1) 4M x 36      (1) 2M x 36     (4) 256K x 9

      28MB         (1) 4M x 36      (1) 2M x 36      (1) 1M x 9

                    DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1          Bank 2

      32MB         (1) 8M x 36          None            None

      32MB         (1) 4M x 36      (1) 4M x 36         None

      33MB         (1) 8M x 36     (1) 256K x 36        None

      33MB         (1) 4M x 36      (1) 4M x 36     (4) 256K x 9

      36MB         (1) 8M x 36      (1) 1M x 36         None

      36MB         (1) 1M x 36      (1) 8M x 36         None

      36MB         (1) 4M x 36      (1) 1M x 36      (1) 4M x 9

      36MB         (1) 4M x 36      (1) 4M x 36      (1) 1M x 9

      40MB         (1) 4M x 36      (1) 2M x 36      (1) 4M x 9

      48MB         (1) 8M x 36      (1) 4M x 36         None

      48MB         (1) 4M x 36      (1) 4M x 36      (1) 4M x 9

      52MB         (1) 4M x 36      (1) 8M x 36      (1) 1M x 9

      64MB         (1) 8M x 36      (1) 8M x 36         None

      64MB         (1) 4M x 36      (1) 8M x 36      (1) 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 (A)      (1) 16K x 8     (1) 16K x 8     (1) 8K x 8

   128KB (B)      (4) 32K x 8        None         (1) 8K x 8

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

   256KB (B)      (4) 64K x 8        None        (1) 32K x 8

   512KB (A)      (4) 64K x 8     (4) 64K x 8    (1) 32K x 8

   512KB (B)     (4) 128K x 8        None        (1) 32K x 8

      1MB        (4) 128K x 8    (4) 128K x 8    (1) 64K x 8

  Note: The location of banks 0 & 1 are unidentified.

                        CACHE JUMPER CONFIGURATION

   Size      JP5      JP10      JP11        JP12       JP13       JP14

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

   128KB    2 & 3     2 & 3     Open        Open       Open      Closed
   (A)

   128KB    1 & 2     1 & 2     Open        Open       Open      Closed
   (B)

   256KB    2 & 3     2 & 3     Open        Open      Closed     Closed
   (A)

   256KB    1 & 2,    1 & 2     Open       Closed     Closed     Closed
   (B)      3 & 4

   512KB    2 & 3,    2 & 3     Open       Closed     Closed     Closed
   (A)      4 & 5

   512KB    1 & 2,    1 & 2     Open       Closed     Closed     Closed
   (B)      3 & 4,
            5 & 6

   1MB      2 & 3,    2 & 3    Closed      Closed     Closed     Closed
            4 & 5,
            6 & 7

  Note: Pins designated should be in the closed position.

            CPU SPEED SELECTION

   Speed      JP6        JP7        JP8

   25MHz      Open       Open     Closed

   33MHz     Closed     Closed    Closed

   40MHz      Open      Closed    Closed

  50iMHz      Open       Open     Closed

   50MHz     Closed      Open      Open

  66iMHz     Closed     Closed    Closed

  75iMHz      Open       Open     Closed

  80iMHz      Open      Closed    Closed

  100iMHz    Closed     Closed    Closed

  120iMHz     Open      Closed    Closed

                            CPU TYPE SELECTION

         Type                JP27             JP28              JP29

        UMC U5               Open             2 & 3            2 & 3

        80486SX              Open             2 & 3             Open

        AM486DX              Open             2 & 3             Open

        80486DX              Open             2 & 3             Open

     CX486DX2 (M7)           2 & 3        1 & 2, 3 & 4,     1 & 2, 3 & 4,
                                              5 & 6            5 & 6

       AM486DX2              Open             2 & 3             Open

       80486DX2              Open             2 & 3             Open

      SL80486DX2         1 & 2, 3 & 4         1 & 2            1 & 2

       AM486DX4          1 & 2, 3 & 4     1 & 2, 4 & 5      1 & 2, 4 & 5

      SL80486DX4         1 & 2, 3 & 4         1 & 2            1 & 2

         P24D            1 & 2, 3 & 4     1 & 2, 4 & 5      1 & 2, 4 & 5

         P24T            1 & 2, 3 & 4         1 & 2            1 & 2

        CX5X86           1 & 2, 3 & 4     1 & 2, 4 & 5      1 & 2, 4 & 5

  Note: Pins designated should be in the closed position.

                    CPU TYPE SELECTION (CONT)

      Type             JP30             JP32            JP33

     UMC U5           1 & 2            3 & 4            2 & 3

     80486SX           Open             Open            2 & 3

     AM486DX           Open            1 & 2        1 & 2, 3 & 4

     80486DX           Open            1 & 2        1 & 2, 3 & 4

  CX486DX2 (M7)    2 & 3, 4 & 5        1 & 2        1 & 2, 3 & 4

    AM486DX2           Open            1 & 2        1 & 2, 3 & 4

    80486DX2           Open            1 & 2        1 & 2, 3 & 4

   SL80486DX2         5 & 6            1 & 2        1 & 2, 3 & 4

    AM486DX4       3 & 4, 5 & 6        1 & 2        1 & 2, 3 & 4

   SL80486DX4         5 & 6            1 & 2        1 & 2, 3 & 4

      P24D         3 & 4, 5 & 6        1 & 2        1 & 2, 3 & 4

      P24T            5 & 6            2 & 3        1 & 2, 3 & 4

     CX5X86        3 & 4, 5 & 6        1 & 2        1 & 2, 3 & 4

  Note: Pins designated should be in the closed position.

  CPU MULTIPLIER SELECTION (AMD)

   Multiplier           JP34

       2x              Closed

       3x               Open

     CPU MULTIPLIER SELECTION (INTEL)

     Multiplier              JP31

         2x           Pins 2 & 3 closed

        2.5x          Pins 1 & 2 closed

         3x                  Open

                           CPU VOLTAGE SELECTION

    Voltage         JP24           JP25           JP26           JP35

     3.3v         Pins 1 & 2     Pins 1 & 2     Pins 1 & 2      Closed
                   closed         closed         closed

      4v          Pins 1 & 2     Pins 1 & 2     Pins 1 & 2       Open
                   closed         closed         closed

      5v          Pins 2 & 3     Pins 2 & 3     Pins 2 & 3       Open
                   closed         closed         closed

  VL BUS WAIT STATE SELECTION

    Setting           JP17

       0              Open

       1             Closed

  VL-BUS SPEED SELECTION

   Setting        JP16

  <= 33MHz        Open

   >33 MHz       Closed

