
DASH COMPUTER, INC.

DC-486SX 25/33/50

Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33/50MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit external memory card slot
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  External battery           J10       32-bit external             S1
                                       memory card

  Power LED & keylock        J23       Reset switch               SW1

  Speaker                    J24       Turbo switch               SW2

  Turbo LED                 JP12

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          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

     Bus speed select ATCLK/6                 JP3            Closed

      Bus speed select ATCLK/4                 JP3             Open

     CPU speed select OSC/2                   JP4           pins 2 & 3
                                                              closed

      CPU speed select OSC/1                   JP4           pins 1 & 2
                                                              closed

                            DRAM CONFIGURATION

     Size          Bank 0        Bank 1         Bank 2         Bank 3

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

      8MB        (4) 1M x 9    (4) 1M x 9        NONE           NONE

     12MB        (4) 1M x 9    (4) 1M x 9     (4) 1M x 9        NONE

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

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

     20MB        (4) 1M x 9    (4) 4M x 9        NONE           NONE

     24MB        (4) 1M x 9    (4) 1M x 9     (4) 4M x 9        NONE

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

     32MB        (4) 4M x 9    (4) 4M x 9        NONE           NONE

     36MB        (4) 1M x 9    (4) 4M x 9     (4) 4M x 9        NONE

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

     48MB        (4) 4M x 9    (4) 4M x 9     (4) 4M x 9        NONE

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

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

  Note:Banks 2 & 3 are used when a 32-bit external memory card is
  installed at S1.

     CACHE CONFIGURATION

     Size          Bank 0

     64KB        (9) 8K x 8

     256KB      (9) 32K x 8

           CACHE JUMPER CONFIGURATION

   Size      JP8       JP9      JP10      JP11

   64KB      Open     Open      Open      Open

  256KB     Closed   Closed    Closed    Closed

                          CPU TYPE CONFIGURATION

       Type               JP5                JP6               JP7

      80486SX             Open            pins 2 & 3          Closed
                                           closed

      80487SX          pins 1 & 2         pins 1 & 2          Closed
                         closed            closed

      80486DX          pins 2 & 3         pins 1 & 2          Closed
                         closed            closed

