DATAEXPERT CORPORATION

OPTI-495WB

Processor         80486SX/80486DX/ODP486SX
Processor Speed   25/33MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                             CONNECTIONS

  Purpose               Location    Purpose                Location

  Power LED & keylock      J1       Turbo switch              J4

  Speaker                  J2       Turbo LED                 J5

  Reset switch             J3       External battery          J6

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

  »   CMOS memory normal operation            J6            pins 2 & 3
                                                              closed

      CMOS memory clear                       J6            pins 3 & 4
                                                              closed

  »   Monitor type select color              JP10             Closed

      Monitor type select monochrome         JP10              Open

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

      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 (U17)      TAG (U18)

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8     (1) 64K x 1

     128KB      (4) 32K x 8        NONE       (1) 8K x 8     (1) 64K x 1

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8    (1) 64K x 1

                   CACHE JUMPER CONFIGURATION

   Size        JP4        JP5        JP6        JP7       JP13

   64KB       2 & 3      Open       Open       Open       Open

   128KB      1 & 2      Open       Open      Closed     Closed

   256KB      2 & 3     Closed      Open      Closed     Closed

  Note:Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

       Type               JP1               JP2                JP3

      80486SX             Open           pins 2 & 3            Open
                                           closed

     ODP486SX            Closed          pins 1 & 2         pins 1 & 2
                                           closed             closed

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