
DASH COMPUTER, INC.

DC3486 VESA

Processor         80386DX/CX486DLC/80486SX/80486DX/80486DX2
Processor Speed   25/33/40/50(internal)/50/66(internal)MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        311mm x 226mm
I/O Options       32-bit VESA card slot (2)
NPU Options       80387DX

[Image]

                                CONNECTIONS

  Purpose                 Location      Purpose                Location

  External battery           J1         Turbo LED                JP32

  Power LED & keylock        J19        Reset switch             SW1

  Speaker                    J20        32-bit VESA local      S1 & S2
                                        bus slots (2)

  Turbo switch              JP31

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS memory normal operation             JP1           pins 2 & 3
                                                              closed

      CMOS memory clear                        JP1           pins 1 & 2
                                                              closed

     Factory configured - do not alter        JP2             open

      AT Bus speed select CLK/5 with           JP3             open
      80386 CPU

      AT Bus speed select CLK/4 with           JP3            closed
      80386 CPU

     Monitor type select color                JP4             open

      Monitor type select monochrome           JP4            closed

                        CACHE JUMPER CONFIGURATION

    Size          JP10            JP11           JP13           JP15

    64KB        pins 2 & 3        open           open           open
                 closed

   128KB        pins 1 & 2       closed         closed          open
                 closed

   256KB        pins 2 & 3       closed         closed         closed
                 closed

                           CACHE CONFIGURATION

     Size          Cache         Location      TAG (U39)      TAG (U40)

     64KB        (8) 8K x 8    Banks 0 & 1    (1) 8K x 8        NONE

     128KB      (4) 32K x 8       Bank 0      (1) 8K x 8     (1) 8K x 8

     256KB      (8) 32K x 8    Banks 0 & 1    (1) 8K x 8     (1) 8K x 8

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

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

      16MB        (4) 4M x 9         NONE

      20MB        (4) 4M x 9      (4) 1M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

                       SLOTS 3 & 4 BUS CONFIGURATION

  Bus Type     JP8 & 9    JP14 &    JP23     JP19       JP21       JP24
                           16       & 27

     VESA      open      open      pins     open       open       open
                                    1 & 2

       AT      closed    closed     pins    closed     closed     closed
                                    2 & 3

  Note:Slots 3 & 4 must both be configured as either 16-bit or 32-bit.

  Note:Pins designated should be in the closed position.

                 CONFIGURATION FOR 80486DX & 80486DX2 CPU

  Jumper    Postition     25MHz     33MHz    50iMHz     50MHz     66iMHz

   JP5      pins 1 & 2    pins 1    pins 1    pins 1    pins 1   pins 1 &
                           & 2       & 2       & 2       & 2        2

   JP6        open        open      open      open      open       open

   JP7        open        open      open      open      open       open

   JP12      closed      closed    closed    closed    closed     closed

   JP17      closed      closed    closed    closed    closed     closed

   JP18       open        open      open      open      open       open

   JP22        N/A        open      open      open     closed      open

   JP25        N/A        pins 2    pins 2    pins 2    pins 1   pins 2 &
                           & 3       & 3       & 3       & 2        3

   JP26        N/A        open      open      open     closed      open

   JP28        N/A       closed     open     closed    closed      open

   JP29        N/A        open     closed     open      open      closed

   JP30        N/A        open      open      open      open       open

   JP33        N/A        pins 2    pins 2    pins 2    pins 1   pins 2 &
                           & 3       & 3       & 3       & 2        3

   JP34        N/A       closed    closed    closed    closed     closed

   JP35     pins 1 & 2    pins 1    pins 1    pins 1    pins 1   pins 1 &
                           & 2       & 2       & 2       & 2        2

   JP36      closed      closed    closed    closed    closed     closed

   JP37     pins 1 & 2    pins 1    pins 1    pins 1    pins 1   pins 1 &
                           & 2       & 2       & 2       & 2        2

  Note:Pins designated should be in the closed position.

                       CONFIGURATION FOR 80486SX CPU

     Jumper            Position            25MHz              33MHz

       JP5            pins 1 & 2         pins 1 & 2         pins 1 & 2
                        closed             closed             closed

       JP6               open               open               open

       JP7               open               open               open

      JP12              closed             closed             closed

      JP17            see note 1         see note 1         see note 1

      JP18               open               open               open

      JP22               N/A                open               open

      JP25               N/A             pins 2 & 3         pins 2 & 3
                                           closed             closed

      JP26               N/A                open               open

      JP28               N/A               closed             closed

      JP29               N/A                open              closed

      JP30               N/A                open               open

      JP33               N/A             pins 2 & 3         pins 2 & 3
                                           closed             closed

      JP34               N/A               closed             closed

      JP35               open               open               open

      JP36               open               open               open

      JP37            pins 2 & 3         pins 2 & 3         pins 2 & 3
                        closed             closed             closed

  Note 1 :Jumper JP17 should be closed when a PGA cpu is installed, open
  for PQFP.

                 CONFIGURATION FOR 80386DX & CX486DLC CPU

     Jumper            Position            33MHz              40MHz

       JP5            pins 2 & 3         pins 2 & 3         pins 2 & 3
                        closed             closed             closed

       JP6            see note 1         see note 1         see note 1

       JP7               open               open               open

      JP12               open               open               open

      JP17               open               open               open

      JP18            see note 2         see note 2         see note 2

      JP22               N/A               closed              open

      JP25               N/A             pins 2 & 3         pins 2 & 3
                                           closed             closed

      JP26               N/A                open              closed

      JP28               N/A                open               open

      JP29               N/A               closed              open

      JP30               N/A               closed             closed

      JP33               N/A             pins 1 & 2         pins 1 & 2
                                           closed             closed

      JP34               N/A                open               open

      JP35               open               open               open

      JP36               open               open               open

      JP37            pins 2 & 3         pins 2 & 3         pins 2 & 3
                        closed             closed             closed

  Note 1 :Jumper JP6 should be closed when a CX486DLC is installed, open
  for 80386DX.

  Note 2 :Jumper JP18 should be closed when a PGA cpu is installed, open
  for PQFP.

