ARTEK COMPUTER SYSTEMS, INC.

OPTI-495 SX CACHE


Processor            80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed      25/33/40/50(internal)/50/66(internal)MHz
Chip Set             OPTI
Max. Onboard DRAM    32MB
SRAM Cache           64/128/256KB
BIOS                 AMI
Dimensions           235mm x 220mm
I/O Options          None
NPU Options          80387

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Reset switch                J1       Speaker                     J4

  Turbo switch                J2       Power LED & keylock         J5

  Turbo LED                   J3       External battery            J7

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation             P1            pins 2 & 3
                                                              closed

      CMOS memory clear                        P1            pins 1 & 2
                                                              closed

  »   Monitor type select color                P2             closed

      Monitor type select monochrome           P2              open

  »   Factory configured - do not alter        P28             open

  »   Factory configured - do not alter        P39             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) 1M x 9     (4) 256K 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

                    SRAM CONFIGURATION

     Size          Cache         Location         TAG

     64KB        (8) 8K x 8    Banks 0 & 1    (1) 8K x 8

     128KB      (4) 32K x 8       Bank 0      (1) 8K x 8

     256KB      (8) 32K x 8    Banks 0 & 1    (1) 32K x 8

                         SRAM JUMPER CONFIGURATION

  Size        P3         P5         P6        P7         P8         P9

  64KB     pins 2 &     open       open      open       open       open
           3 closed

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

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

                             CPU CONFIGURATION

      CPU            P4             P25           P33            P100

  80486 (PGA)     pins 2 & 3     pins 1 & 2      closed       pins 2 & 3
                   closed         closed                        closed

  80386 (PQFP)    pins 1 & 2     pins 2 & 3       open        pins 1 & 2
                   closed         closed                        closed

                          80486 CPU CONFIGURATION

         CPU                P12               P13               P14

  80486DX/80486DX2       pins 1 & 2        pins 1 & 2          closed
                           closed            closed

       80487SX           pins 1 & 2        pins 2 & 3          closed
                           closed            closed

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

                     CPU SPEED CONFIGURATION

   Speed       CPU        P30        P31        P32       P97

  66iMHz      80486     closed      open      closed     closed

   50MHz      80486     closed     closed      open      closed

  50iMHz      80486      open      closed      open       open

   40MHz      80386      open       open      closed     closed

   33MHz      80486     closed     closed      open       open

   33MHz      80386     closed     closed      open      closed

   25MHz      80486     closed      open      closed      open