
SILICON VALLEY TECHNOLOGY

OPTI-486

Processor         80486SX/80486DX
Processor Speed   33/40MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI/MR
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery            J11       Turbo LED                 JP11

  Power LED & keylock         J20       Reset switch               SW1

  Speaker                     J21       Turbo switch               SW2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS memory normal operation             JP1           pins 2 & 3
                                                              closed

      CMOS memory clear                        JP1           pins 1 & 2
                                                              closed

     Monitor type select color                JP2            Closed

      Monitor type select monochrome           JP2             Open

     Bus clock speed select ATCLK/4           JP6            Closed

      Bus clock speed select ATCLK/6           JP6             Open

     CPU speed select double frequency        JP7           pins 2 & 3
      clock                                                   closed

      CPU speed select singal phase            JP7           pins 1 & 2
      clock                                                   closed

           DRAM CONFIGURATION

     Size        Bank 0        Bank 1

     4MB        (4) 1M x 9      NONE

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

     12MB       (4) 1M x 9   (4) 1M x 9

     16MB       (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          Cache           TAG

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

     256KB       (8) 32K x 8   (1) 16K x 8

           CACHE JUMPER CONFIGURATION

   Size      JP8       JP9      JP10      JP12

   64KB     Open      Open      Open      Open

  256KB     Open     Closed    Closed    Closed

                          CPU TYPE CONFIGURATION

       Size               JP3               JP4                JP5

      80486SX             Open              Open            pins 2 & 3
                                                             closed

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

