ARTEK COMPUTER SYSTEMS, INC.

OPTI 486-33 AT

Processor         80486SX/80486DX
Processor Speed   20/25/33MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/128/256/512KB
BIOS              AMI/MR
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  External battery     J1 pins 1 & 4   Turbo LED                 J4

  Power LED &               J2         Turbo switch              J5
  keylock

  Speaker                   J3         Reset switch              J6

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

  »   CMOS memory normal operation            J1            pins 2 & 3
      (internal battery)                                      closed

      CMOS memory normal operation            J1              Closed
      (external battery)

      CMOS memory clear                       J1            pins 3 & 4
                                                              closed

  »   Bus speed select iOSC/6                 JP7              Open

      Bus speed select iOSC/8                 JP7             Closed

  »   Monitor type select color              JP12             Closed

      Monitor type select monochrome         JP12              Open

           DRAM CONFIGURATION

    Size        Bank 0        Bank 1

     4MB       (4) 1M x 9      NONE

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

    16MB       (4) 4M x 9      NONE

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

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

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U41)      TAG (U57)

     64KB        (8) 8K x 8        NONE       (1) 8K x 8     (1) 64K x 1

     128KB       (8) 8K x 8     (8) 8K x 8    (1) 8K x 8     (1) 64K x 1

     256KB      (8) 32K x 8        NONE       (1) 32K x 8    (1) 64K x 1

     512KB      (8) 32K x 8    (8) 32K x 8    (1) 32K x 8    (1) 64K x 1

                        CACHE JUMPER CONFIGURATION

   Size          JP6         JP8          JP9        JP10         JP11

   64KB       pins 2 & 3     Open        Open        Open         Open
               closed

   128KB      pins 2 & 3     Open       Closed       Open        Closed
               closed

   256KB      pins 2 & 3     Open       Closed      Closed       Closed
               closed

   512KB      pins 1 & 2    Closed      Closed      Closed       Closed
               closed

                          CPU TYPE CONFIGURATION

       Type               JP2                JP3               JP4

      80486SX             Open            pins 1 & 2           Open
                                           closed

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