ATRONICS INTERNATIONAL, INC.

ATI-486/B2

Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33/40/50MHz
Chip Set          UMC
Max. Onboard DRAM 32MB
Cache             32/64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit external memory card
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  External battery           J4        32-bit external             S1
                                       memory card

  Turbo switch               J5        Reset switch                W7

  Speaker                    J6        Turbo LED                  W11

  Power LED & Keylock        J7

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select monochrome           W8            pins 1 & 2
                                                              closed

      Monitor type select color                W8            pins 2 & 3
                                                              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

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

      16MB        (4) 4M x 9         NONE

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

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

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

                         DRAM JUMPER CONFIGURATION

           Type                     JP2                     JP3

  Onboard and/or external    pins 1 & 2 closed       pins 1 & 2 closed
           card

    External card only       pins 2 & 3 closed       pins 2 & 3 closed

                            CACHE CONFIGURATION

       Size             Bank 0           Bank 1         TAG (T0,T1,T3)

       32KB           (4) 8K x 8          NONE            (3) 16K x 4

       64KB           (4) 8K x 8       (4) 8K x 8         (3) 16K x 4

      128KB          (4) 32K x 8          NONE            (3) 16K x 4

      256KB          (4) 32K x 8      (4) 32K x 8         (3) 16K x 4

  Note:A 16K x 4 chip is used in DIP socket T2 only when cacheable DRAM
  exceeds 16MB.

                  CACHE JUMPER CONFIGURATION

  Size      W1       W2       W3       W4       W5      W10

  32KB     1 & 2   1 & 2    1 & 2    1 & 2    1 & 2    1 & 2

  64KB     2 & 3   1 & 2    1 & 2    2 & 3    2 & 3    2 & 3

  128KB    1 & 2   1 & 2    2 & 3    1 & 2    2 & 3    2 & 3

  256KB    2 & 3   2 & 3    2 & 3    2 & 3    2 & 3    2 & 3

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

     Type          JP9            JP11           JP12           JP13

   80486SX      pins 1 & 2     pins 2 & 3     pins 2 & 3      pins 2 & 3
                  closed         closed         closed         closed

   80487SX      pins 2 & 3     pins 2 & 3     pins 2 & 3      pins 2 & 3
                  closed         closed         closed         closed

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