
ATEN RESEARCH, INC.

486-KVD

Processor        80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed  25/33/40/50(internal)/50/66(internal)MHz
Chip Set         VIA
Max. Onboard DRAM128MB
Cache            64/128/256KB
BIOS             Award
Dimensions       254mm x 220mm
I/O Options      32-bit VESA local bus slots (2)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  External battery            J2       Speaker                    J12

  Turbo LED                   J9       Power LED & keylock        J13

  Turbo switch               J10       32-bit VESA local bus   SL1 & SL2
                                       slots

  Reset switch               J11

                        USER CONFIGURABLE SETTINGS

                 Function                      Jumper         Position

     Battery type select internal               J1          pins 2 & 3
                                                               closed

      Battery type select external               J1          pins 1 & 2
                                                               closed

     Monitor type select                        J4             Open
      monochrome/EGA/VGA

      Monitor type select color                  J4            Closed

     Password clear Award                       J7          pins 1 & 2
                                                               closed

      Password clear AMI                         J7          pins 2 & 3
                                                               closed

     Factory configured - do not alter         JC5             N/A

     CMOS memory normal operation               S1             Open

      CMOS memory clear                          S1            Closed

              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

      5MB         (4) 1M x 9     (4) 256K x 9

      5MB         (4) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 4M x 9     (4) 256K x 9

      17MB        (4) 256K x 9    (4) 4M x 9

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

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

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

      64MB        (4) 16M x 9        NONE

      65MB        (4) 16M x 9    (4) 256K x 9

      65MB        (4) 256K x 9   (4) 16M x 9

      68MB        (4) 16M x 9     (4) 1M x 9

      68MB        (4) 1M x 9     (4) 16M x 9

      80MB        (4) 16M x 9     (4) 4M x 9

      80MB        (4) 4M x 9     (4) 16M x 9

     128MB        (4) 16M x 9    (4) 16M x 9

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

                        CACHE JUMPER CONFIGURATION

      Size               JS1               JS2                 JS3

      64KB            pins 1 & 2        pins 1 & 2      pins 1 & 2 closed
                       closed             closed

      128KB           pins 1 & 2        pins 2 & 3      pins 2 & 3 closed
                       closed             closed

      256KB           pins 2 & 3        pins 2 & 3      pins 1 & 2 closed
                       closed             closed

                          CPU TYPE CONFIGURATION

     Type            JC1            JC2            JC3           JC4

    80486SX       pins 2 & 3     pins 2 & 3       Open           Open
                   closed          closed

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

                    CPU CLOCK SPEED CONFIGURATION

               Speed                              JK1

               25MHz                       pins 5 & 6 closed

               33MHz                       pins 1 & 2 closed

               40MHz                pins 1 & 2, 5 & 6, 7 & 8 closed

               40MHz                    pins 1 & 2, 3 & 4 closed

              50iMHz                    pins 5 & 6, 7 & 8 closed

               50MHz                       pins 3 & 4 closed

               66MHz                    pins 3 & 4, 7 & 8 closed

              66iMHz                    pins 1 & 2, 7 & 8 closed

               80MHz                pins 1 & 2, 3 & 4, 7 & 8 closed

            Power down                            Open

      VESA WAIT STATE CONFIGURATION

     Wait states             JV3

    0 wait states     pins 2 & 3 closed

    1 wait state      pins 1 & 2 closed

         BUS SPEED CONFIGURATION

      CPU speed              JV2

      <= 33MHz        pins 2 & 3 closed

       > 33MHz        pins 1 & 2 closed

                          KEYBOARD CONFIGURATION

  Setting       J3         JB1       JB2       JB3       JB4        JB5

  Internal     Open       2 & 3     2 & 3     2 & 3     2 & 3      2 & 3

  External    Closed      1 & 2     1 & 2     1 & 2     1 & 2      1 & 2

  Note: Pins designated should be in the closed position.

