
DASH COMPUTER, INC.

486 VL3 CACHE (MV035E)

Device Type         Mainboard
Processor           80486SX/80487SX/80486DX/CX M6/CX M7/P24C/P24D/P24T
Processor Speed     25/33/40/50(internal)/50/66(internal)/100(internal)MHz
Chip Set            OPTI
Video Chip Set      None
Maximum Onboard     128MB
Memory
Maximum Video       None
Memory
Cache               64/128/256/512KB
BIOS                Award
Dimensions          250mm x 220mm
I/O Options         32-bit VESA local bus slots (3), green PC connector
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  External battery            J2       Speaker                    JP38

  Power LED & keylock        J22       Green PC connector         JP39

  Green PC connector         JP6       Green PC LED               JP41

  Turbo LED                  JP34      Reset switch                S1

  Turbo switch               JP36      32-bit VESA local bus   SL1  SL3
                                       slots

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Monitor type select color               JP1             Closed

      Monitor type select monochrome          JP1              Open

     CMOS memory normal operation            JP2           Pins 2 & 3
                                                              closed

      CMOS memory clear                       JP2           Pins 1 & 2
                                                              closed

     Factory configured - do not alter       JP7             Closed

     Factory configured - do not alter       JP31          Pins 2 & 3
                                                              closed

                           DRAM CONFIGURATION 1

     Size          Bank 0        Bank 1         Bank 2         Bank 3

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

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

     4MB         (4) 1M x 9       None           None           None

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

     5MB        (4) 256K x 9   (1) 1M x 36       None           None

     6MB        (4) 256K x 9    (1) 256K x    (1) 1M x 36       None
                                   36

     8MB         (4) 1M x 9    (1) 1M x 36       None           None

     8MB         (4) 1M x 9       None        (1) 1M x 36       None

     10MB       (4) 256K x 9    (1) 256K x    (1) 1M x 36    (1) 1M x 36
                                   36

     12MB        (4) 1M x 9       None        (1) 1M x 36    (1) 1M x 36

     16MB        (4) 4M x 9       None           None           None

     16MB        (4) 1M x 9    (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

     17MB       (4) 256K x 9   (1) 4M x 36       None           None

     20MB        (4) 1M x 9    (1) 4M x 36       None           None

     20MB        (4) 1M x 9       None        (1) 4M x 36       None

     32MB        (4) 4M x 9    (1) 4M x 36       None           None

     64MB        (4) 4M x 9    (1) 4M x 36    (1) 4M x 36    (1) 4M x 36

     80MB        (4) 4M x 9    (1) 16M x 36      None           None

     96MB        (4) 4M x 9    (1) 16M x 36   (1) 4M x 36       None

    112MB        (4) 4M x 9    (1) 16M x 36   (1) 4M x 36    (1) 4M x 36

                           DRAM CONFIGURATION 2

     Size          Bank 0         Bank 1         Bank 2         Bank 3

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

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

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

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

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

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

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

     64MB           None       (1) 16M x 36       None           None

     80MB           None       (1) 16M x 36    (1) 4M x 36       None

     96MB           None       (1) 16M x 36    (1) 4M x 36   (1) 4M x 36

     72MB           None       (1) 16M x 36    (1) 1M x 36   (1) 1M x 36

     128MB          None       (1) 16M x 36     (1) 16M x        None
                                                   36

        DRAM JUMPER CONFIGURATION

    Configuration            JP5

          1           Pins 2 & 3 closed

          2           Pins 1 & 2 closed

                      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 (A)      (4) 32K x 8     (4) 32K x 8    (1) 16K x 8

   256KB (B)     (2) 64K x 32        None        (1) 32K x 8

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

                        CACHE JUMPER CONFIGURATION

    Size         JP8         JP27         JP28         JP43        JP44

    64KB        2 & 3        Open         Open         Open       1 & 2

    128KB       1 & 2       Closed        Open         Open       1 & 2

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

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

    512KB       1 & 2       Closed       Closed       Closed      1 & 2

  Note: Pins designated should be in the closed position.

            CPU SPEED SELECTION

   Speed      JP16       JP17      JP18

   25MHz      Open       Open      Open

   33MHz      Open      Closed    Closed

   40MHz      Open      Closed     Open

  50iMHz      Open       Open      Open

   50MHz      Open       Open     Closed

  66iMHz      Open      Closed    Closed

  100iMHz     Open      Closed    Closed

                            CPU TYPE SELECTION

   Type        JP9      JP11    JP12    JP13     JP15      JP23     JP32

  80486SX     Open      1 & 2   Open    Open     Open      2 & 3    Open

  80487SX     Open      1 & 2   Open    2 & 3    Open       1 &     Open
                                                           2, 3
                                                           & 4

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

   CX M6     Closed     2 & 3   2 & 3   Open     Open      2 & 3   1 & 2

   CX M7     Closed     2 & 3   2 & 3   1 & 2    Open       1 &     Open
                                                           2, 3
                                                           & 4

   P24C       Open      1 & 2   Open    1 & 2    Open       1 &     Open
                                                           2, 3
                                                           & 4

   P24D       Open      2 & 3   Open    1 & 2   Closed      1 &    2 & 3
                                                           2, 3
                                                           & 4

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

  Note: Pins designated should be in the closed position.

                    CPU TYPE SELECTION (SL/NON-SL CPU)

       Type             JP10          JP12          JP20         JP21

    SL-enhanced         Open          Open          Open         Open

  Non SL-enhanced      Closed      Pins 1 & 2      Closed       Closed
                                     closed

    CPU TYPE SELECTION (CX M7)

      Type             JP22

  All CPU types        Open

    CX M7 2x          Closed

      CPU TYPE SELECTION (P24D ONLY)

        Type                 JP19

    Write through     Pins 2 & 3 closed

     Write back       Pins 1 & 2 closed

  CPU MULTIPLIER SELECTION (80486DX4 ONLY)

      Multiplier               JP30

          2x             Pins 1 & 2 closed

         2.5x            Pins 2 & 3 closed

          3x                   Open

                 CPU VOLTAGE SELECTION

          Voltage                      JP29

           3.45v             Pins 3 & 5, 4 & 6 closed

             5v              Pins 1 & 3, 2 & 4 closed

  VL BUS WAIT STATE SELECTION

    Setting           JP35

       0              Open

       1             Closed

                    VL BUS SPEED SELECTION

        Speed                JP33                 JP37

      <= 33MHz         Pins 2 & 3 closed          Open

       >33 MHz         Pins 1 & 2 closed         Closed

