
SPRINT MANUFACTURING CORPORATION

MB-486VI

Processor    80486SX/80486DX/80486DX2/80486DX4/P24D/P24T
Processor    16/20/25/33/40/50(internal)/50/66(internal)/75(internal)/
Speed        80(internal)/100(internal)MHz
Chip Set     Unidentified
Video Chip   None
Set
Maximum      128MB
Onboard
Memory
Maximum      None
Video Memory
Cache        64/128/256/512/1024KB
BIOS         AMI
Dimensions   254mm x 218mm
I/O Options  32-bit VESA local bus slots (3)
NPU Options  None

[Image]

                         CONNECTIONS

  Purpose                                 Location

  32-bit VESA local bus slots            SL1 - SL3

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Monitor type select color               JP17            Closed

      Monitor type select monochrome          JP17             Open

      BIOS type select EPROM                  JP18          Pins 1 & 2
                                                              closed

      BIOS type select flash                  JP18          Pins 2 & 3
                                                              closed

     Factory configured - do not alter       JP22            Closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

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

     2MB        (1) 512K x        None           None           None
                    36

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

     3MB        (1) 512K x     (1) 256K x        None           None
                    36             36

     3MB        (1) 256K x     (1) 256K x     (1) 256K x        None
                    36             36             36

     3MB        (1) 256K x     (1) 512K x        None           None
                    36             36

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

     4MB        (1) 512K x     (1) 256K x     (1) 256K x        None
                    36             36             36

     4MB        (1) 512K x     (1) 512K x        None           None
                    36             36

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

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

     5MB        (1) 512K x     (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

     5MB        (1) 256K x     (1) 512K x     (1) 512K x        None
                    36             36             36

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

     6MB       (1) 1M x 36     (1) 256K x     (1) 256K x        None
                                   36             36

     6MB       (1) 1M x 36     (1) 512K x        None           None
                                   36

     6MB        (1) 512K x     (1) 512K x     (1) 512K x        None
                    36             36             36

     6MB        (1) 512K x    (1) 1M x 36        None           None
                    36

     7MB       (1) 1M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     7MB        (1) 256K x     (1) 512K x     (1) 512K x    (1) 512K x 36
                    36             36             36

     8MB       (1) 2M x 36        None           None           None

     8MB       (1) 1M x 36     (1) 512K x     (1) 512K x        None
                                   36             36

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

     8MB        (1) 512K x     (1) 512K x     (1) 512K x    (1) 512K x 36
                    36             36             36

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

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

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

     10MB      (1) 2M x 36     (1) 256K x     (1) 256K x        None
                                   36             36

     10MB      (1) 2M x 36     (1) 512K x        None           None
                                   36

     10MB      (1) 1M x 36     (1) 512K x     (1) 512K x    (1) 512K x 36
                                   36             36

     10MB       (1) 512K x    (1) 1M x 36    (1) 1M x 36        None
                    36

     10MB       (1) 512K x    (1) 2M x 36        None           None
                    36

     11MB      (1) 2M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     12MB      (1) 2M x 36     (1) 512K x     (1) 512K x        None
                                   36             36

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

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

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

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

     13MB       (1) 256K x    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

     14MB      (1) 2M x 36     (1) 512K x     (1) 512K x    (1) 512K x 36
                                   36             36

     14MB       (1) 512K x    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

     16MB      (1) 4M x 36        None           None           None

     16MB      (1) 2M x 36    (1) 1M x 36    (1) 1M x 36        None

     16MB      (1) 2M x 36    (1) 2M x 36        None           None

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

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

     17MB       (1) 256K x    (1) 2M x 36    (1) 2M x 36        None
                    36

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

     18MB      (1) 4M x 36     (1) 256K x     (1) 256K x        None
                                   36             36

     18MB      (1) 4M x 36     (1) 512K x        None           None
                                   36

     18MB       (1) 512K x    (1) 2M x 36    (1) 2M x 36        None
                    36

     18MB       (1) 512K x    (1) 4M x 36        None           None
                    36

     19MB      (1) 4M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     20MB      (1) 4M x 36     (1) 512K x     (1) 512K x        None
                                   36             36

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

     20MB      (1) 2M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     20MB      (1) 1M x 36    (1) 2M x 36    (1) 2M x 36        None

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

     22MB      (1) 4M x 36     (1) 512K x     (1) 512K x    (1) 512K x 36
                                   36             36

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

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

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

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

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

     26MB       (1) 512K x    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36
                    36

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

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

     32MB      (1) 8M x 36        None           None           None

     32MB      (1) 4M x 36    (1) 2M x 36    (1) 2M x 36        None

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

     32MB      (1) 2M x 36    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36

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

     33MB       (1) 256K x    (1) 4M x 36    (1) 4M x 36        None
                    36

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

     34MB      (1) 8M x 36     (1) 256K x     (1) 256K x        None
                                   36             36

     34MB      (1) 8M x 36     (1) 512K x        None           None
                                   36

     34MB       (1) 512K x    (1) 4M x 36    (1) 4M x 36        None
                    36

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0        Bank 1         Bank 2         Bank 3

     34MB        (1) 512K x    (1) 8M x 36       None           None
                     36

     35MB       (1) 8M x 36     (1) 256K x     (1) 256K x   (1) 256K x 36
                                   36             36

     36MB       (1) 8M x 36     (1) 512K x     (1) 512K x       None
                                   36             36

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

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

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

     38MB       (1) 8M x 36     (1) 512K x     (1) 512K x   (1) 512K x 36
                                   36             36

     40MB       (1) 8M x 36    (1) 1M x 36    (1) 1M x 36       None

     40MB       (1) 8M x 36    (1) 2M x 36       None           None

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

     40MB       (1) 2M x 36    (1) 4M x 36    (1) 4M x 36       None

     40MB       (1) 2M x 36    (1) 8M x 36       None           None

     44MB       (1) 8M x 36    (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

     48MB       (1) 8M x 36    (1) 2M x 36    (1) 2M x 36       None

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

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

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

     49MB        (1) 256K x    (1) 4M x 36    (1) 4M x 36    (1) 4M x 36
                     36

     50MB        (1) 512K x    (1) 4M x 36    (1) 4M x 36    (1) 4M x 36
                     36

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

     56MB       (1) 8M x 36    (1) 2M x 36    (1) 2M x 36    (1) 2M x 36

     56MB       (1) 2M x 36    (1) 4M x 36    (1) 4M x 36    (1) 4M x 36

     64MB       (1) 8M x 36    (1) 4M x 36    (1) 4M x 36       None

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

     64MB       (1) 4M x 36    (1) 4M x 36    (1) 4M x 36    (1) 4M x 36

     65MB        (1) 256K x    (1) 8M x 36    (1) 8M x 36       None
                     36

     66MB        (1) 512K x    (1) 8M x 36    (1) 8M x 36       None
                     36

     68MB       (1) 1M x 36    (1) 8M x 36    (1) 8M x 36       None

     72MB       (1) 2M x 36    (1) 8M x 36    (1) 8M x 36       None

     80MB       (1) 8M x 36    (1) 4M x 36    (1) 4M x 36    (1) 4M x 36

     80MB       (1) 4M x 36    (1) 8M x 36    (1) 8M x 36       None

     96MB       (1) 8M x 36    (1) 8M x 36    (1) 8M x 36       None

     97MB        (1) 256K x    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36
                     36

     98MB        (1) 512K x    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36
                     36

    100MB       (1) 1M x 36    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

    104MB       (1) 2M x 36    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

    112MB       (1) 4M x 36    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

    128MB       (1) 8M x 36    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

  Note: Board also accepts x 32 SIMMs.

                   DRAM JUMPER CONFIGURATION

              Type                            JP3

          Normal SIMM                        Open

  4K fast refresh 4M x 16 SIMM              Closed

                          CACHE CONFIGURATION

       Size             Bank 0            Bank 1             TAG

       64KB           (4) 8K x 8        (4) 8K x 8        (2) 8K x 8

      128KB          (4) 32K x 8           None           (2) 8K x 8

      256KB          (4) 32K x 8       (4) 32K x 8       (2) 32K x 8

      512KB          (4) 128K x 8          None          (2) 32K x 8

       1MB           (4) 128K x 8      (4) 128K x 8      (2) 128K x 8

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

                 CACHE JUMPER CONFIGURATION

   Size       JD1       JD2       JT1       JT2       JT3

   64KB      2 & 3     2 & 3     1 & 2     1 & 2     1 & 2

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

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

  512KB      1 & 2     1 & 2     2 & 3     2 & 3     2 & 3

   1MB       2 & 3     2 & 3     2 & 3     2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

         CACHE TAG CONFIGURATION

       Setting               JP16

    TAG combined      Pins 1 & 2 closed

    TAG separated     Pins 2 & 3 closed

       CPU CLOCK SPEED SELECTION

  Speed      JP25     JP26      JP27

  16MHz     Closed   Closed    Closed

  20MHz      Open    Closed    Closed

  25MHz     Closed    Open     Closed

  33MHz      Open     Open     Closed

  40MHz     Closed   Closed     Open

  50MHz      Open    Closed     Open

  66MHz     Closed    Open      Open

                            CPU TYPE SELECTION

    Type       JP5       JP6       JP7     JP11     JP41         RN1

   80486SX     2 & 3    Closed     N/A     N/A      N/A     Not installed

   80486DX     1 & 2    Closed     N/A    1 & 2     N/A       Installed

  80486DX2     1 & 2    Closed     N/A    1 & 2     N/A       Installed

  80486DX4     1 & 2    Closed     N/A    1 & 2     N/A       Installed

    P24D       1 & 2    Closed    2 & 3   1 & 2    1 & 2      Installed

    P24T       1 & 2     N/A       N/A    2 & 3     N/A       Installed

  Note: Pins designated should be in the closed position.

                   CPU TYPE SELECTION

       Type               JP2                RN2

  Non SL-enhanced         Open          Not installed

    SL-enhanced          Closed           Installed

      CPU TYPE SELECTION (P24D & P24T ONLY)

      Type             JP1              JP4

   Write back         Closed           Closed

  Write through        Open             Open

         CPU MULTIPLIER SELECTION

     Multiplier              JP10

         2x           Pins 1 & 2 closed

        2.5x          Pins 2 & 3 closed

         3x                  Open

       VL BUS WAIT STATE SELECTION

       Setting               JP20

          0           Pins 1 & 2 closed

          1           Pins 2 & 3 closed

          VL-BUS SPEED SELECTION

       Setting               JP21

      <= 33MHz        Pins 1 & 2 closed

       >33 MHz        Pins 2 & 3 closed

