
DASH COMPUTER, INC.

DC-420

Processor  CX486DX/IBM486DX/TI486DX/SGS486DX/80486DX/AM486DX2/
           (SL)486DX2/CX486DX2/IBM486DX2/TI486DX2/SGS486DX2/
           80486DX2/CX486DX4/IBM486DX4/TI486DX4/SGS486DX4/
           AM486DX4/(SL)AM486DX4/SL80486DX4/P24D/CX5X86/AM X5
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed      100(internal)/120(internal)/133(internal)MHz
Chip Set   UMC
Video Chip None
Set
Maximum    128MB
Onboard
Memory
Maximum    None
Video
Memory
Cache      128/256/512/1024KB
BIOS       AMI
Dimensions 250mm x 220mm
I/O        32-bit VESA local bus slot, 32-bit PCI slots (3), floppy drive
Options    interface, green PC connector, IDE interfaces (2), parallel
           port, serial ports (2), cache slot
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Serial port 1              CN1       Turbo LED                  J10

  Serial port 2              CN2       Reset switch               J11

  Parallel port              CN3       Turbo switch               J12

  Floppy drive               CN4       IDE interface LED          J13
  interface

  IDE interface 1            CN5       Green PC connector         J14

  IDE interface 2            CN6       32-bit PCI slots        PC1 - PC3

  External battery            J4       32-bit VESA local bus      SL1
                                       slot

  Power LED & keylock         J8       Cache slot                 SL2

  Speaker                     J9

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

      Battery type select internal          J4         Pins 2 & 3 closed

      Battery type select external          J4              Closed

      CMOS memory clear                     J4         Pins 3 & 4 closed

     Factory configured - do not           JP1          Unidentified
      alter

      Flash BIOS voltage select 12v         JP2        Pins 1 & 2 closed

      Flash BIOS voltage select 5v          JP2        Pins 2 & 3 closed

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       1MB         (4) 256K x 9         None            None

       1MB             None        (1) 256K x 36        None

       2MB             None        (1) 512K x 36        None

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

       3MB         (4) 256K x 9         None        (1) 512K x 36

       4MB         (4) 256K x 9    (1) 256K x 36    (1) 512K x 36

       4MB          (4) 1M x 9          None            None

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

       4MB             None         (1) 1M x 36         None

       4MB             None             None         (1) 1M x 36

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

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

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

       6MB          (4) 1M x 9          None        (1) 512K x 36

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

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

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

       8MB             None         (1) 2M x 36         None

       8MB             None             None         (1) 2M x 36

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

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

                        DRAM CONFIGURATION (CONT)

       Size             Bank 0             Bank 1             Bank 2

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

       10MB           (4) 1M x 9        (1) 1M x 36       (1) 512K x 36

       12MB           (4) 1M x 9        (1) 1M x 36        (1) 1M x 36

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

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

       16MB           (4) 4M x 9            None               None

       16MB              None           (1) 4M x 36            None

       16MB              None               None           (1) 4M x 36

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

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

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

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

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

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

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

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

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

       32MB              None               None           (1) 8M x 36

       33MB          (4) 256K x 9       (1) 8M x 36            None

       34MB           (4) 4M x 9        (1) 4M x 36       (1) 512K x 36

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

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

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

       48MB           (4) 4M x 9            None           (1) 8M x 36

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

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

       64MB              None           (1) 16M x 36           None

       65MB              None          (1) 256K x 36       (1) 16M x 36

       66MB              None          (1) 512K x 36       (1) 16M x 36

       68MB              None           (1) 1M x 36        (1) 16M x 36

       72MB              None           (1) 2M x 36        (1) 16M x 36

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

       96MB              None           (1) 8M x 36        (1) 16M x 36

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

  Note: Any combination of memory is valid. This table only shows a
  sample of possible configurations.

                CACHE CONFIGURATION

           Size                      SL1

          128KB            128KB module installed

          256KB            256KB module installed

          512KB            512KB module installed

           1MB              1MB module installed

            CPU SPEED SELECTION

   Speed      JP3A       JP3B      JP3C

   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

  133iMHz    Closed     Closed    Closed

                            CPU TYPE SELECTION

      Type           JP6          JP7        JP8A       JP8B       JP9A

     CX486DX         Open        Open        Open      1 & 2      1 & 2

    IBM486DX         Open        Open        Open      1 & 2      1 & 2

     TI486DX         Open        Open        Open      1 & 2      1 & 2

    SGS486DX         Open        Open        Open      1 & 2      1 & 2

     80486DX         Open       Closed       2 & 3      Open      2 & 3

    AM486DX2         Open       Closed       2 & 3      Open      2 & 3

  (SL) AM486DX2     Closed       Open        1 & 2      Open      1 & 2

    CX486DX2         Open        Open        Open      1 & 2      1 & 2

    IBM486DX2        Open        Open        Open      1 & 2      1 & 2

    TI486DX2         Open        Open        Open      1 & 2      1 & 2

    SGS486DX2        Open        Open        Open      1 & 2      1 & 2

    80486DX2         Open       Closed       2 & 3      Open      2 & 3

  CX486DX4 (A)       Open        Open        1 & 2      Open      1 & 2

    CX486DX4         Open        Open        Open      1 & 2      1 & 2

  IBM486DX4 (A)      Open        Open        1 & 2      Open      1 & 2

    IBM486DX4        Open        Open        Open      1 & 2      1 & 2

    TI486DX4         Open        Open        Open      1 & 2      1 & 2

  SGS486DX4 (A)      Open        Open        1 & 2      Open      1 & 2

    SGS486DX4        Open        Open        Open      1 & 2      1 & 2

    AM486DX4         Open       Closed       2 & 3      Open      2 & 3

  (SL) AM486DX4     Closed       Open        1 & 2      Open      1 & 2

   SL80486DX4        Open        Open        2 & 3      Open      1 & 2

      P24D           Open        Open        1 & 2      Open      1 & 2

     CX5X86         Closed       Open        1 & 2      Open      1 & 2

      AM X5         Closed       Open        1 & 2      Open      1 & 2

  Note: Pins designated should be in the closed position. (A) = Intel pin
  out.

                        CPU TYPE SELECTION (CONT)

      Type          JP9B       JP9C      JP10A       JP10B       JP10C

     CX486DX        1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

    IBM486DX        1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

     TI486DX        1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

    SGS486DX        1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

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

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

  (SL) AM486DX2     1 & 2,    3 & 4      3 & 4      1 & 2, 3   1 & 2, 3 &
                    3 & 4                             & 4          4

    CX486DX2        1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

    IBM486DX2       1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

    TI486DX2        1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

    SGS486DX2       1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

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

  CX486DX4 (A)      1 & 2,    3 & 4      3 & 4      1 & 2, 3   1 & 2, 3 &
                    3 & 4                             & 4          4

    CX486DX4        1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

  IBM486DX4 (A)     1 & 2,    3 & 4      3 & 4      1 & 2, 3   1 & 2, 3 &
                    3 & 4                             & 4          4

    IBM486DX4       1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

    TI486DX4        1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

  SGS486DX4 (A)     1 & 2,    3 & 4      3 & 4      1 & 2, 3   1 & 2, 3 &
                    3 & 4                             & 4          4

    SGS486DX4       1 & 2     2 & 3      3 & 4       2 & 3     1 & 2, 3 &
                                                                   4

    AM486DX4        Open       Open      3 & 4        Open     1 & 2, 3 &
                                                                   4

  (SL) AM486DX4     1 & 2,    3 & 4      3 & 4      1 & 2, 3   1 & 2, 3 &
                    3 & 4                             & 4          4

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

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

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

      AM X5         1 & 2,    3 & 4      3 & 4      1 & 2, 3   1 & 2, 3 &
                    3 & 4                             & 4          4

  Note: Pins designated should be in the closed position. (A) = Intel pin
  out.

                        CPU TYPE SELECTION (CONT)

      Type          JP11       JP12A      JP12B        JP13        JP14

     CX486DX        2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

    IBM486DX        2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

     TI486DX        2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

    SGS486DX        2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

     80486DX        Open       1 & 2      1 & 2        Open        Open

    AM486DX2        Open       1 & 2      2 & 3        Open        Open

  (SL) AM486DX2     Open       1 & 2      1 & 2        Open      2 & 3, 4
                                                                   & 5

    CX486DX2        2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

    IBM486DX2       2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

    TI486DX2        2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

    SGS486DX2       2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

    80486DX2        Open       1 & 2      1 & 2        Open        Open

  CX486DX4 (A)      Open       2 & 3      1 & 2       Closed     2 & 3, 4
                                                                   & 5

    CX486DX4        2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

  IBM486DX4 (A)     Open       2 & 3      1 & 2       Closed     2 & 3, 4
                                                                   & 5

    IBM486DX4       2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

    TI486DX4        2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

  SGS486DX4 (A)     Open       2 & 3      1 & 2       Closed     2 & 3, 4
                                                                   & 5

    SGS486DX4       2 & 3      2 & 3      1 & 2        Open      1 & 2, 3
                                                                   & 4

    AM486DX4        Open       1 & 2      2 & 3        Open        Open

  (SL) AM486DX4     Open       1 & 2      1 & 2        Open      2 & 3, 4
                                                                   & 5

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

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

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

      AM X5         Open       1 & 2      1 & 2        Open      2 & 3, 4
                                                                   & 5

  Note: Pins designated should be in the closed position. (A) = Intel pin
  out.

                     CPU VOLTAGE SELECTION

  Voltage     JP4       JP5A       JP5B       JP5C      JP5D

   3.3v      Closed     1 & 2     1 & 2      1 & 2     1 & 2

    4v        Open      1 & 2     1 & 2      1 & 2     1 & 2

    5v       Closed     2 & 3     2 & 3      2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

