UNIDENTIFIED

OPTI-495SLC-3/486WB CACHE

Processor         80386DX/80486SX/80486DX /80486DX2/ODP486SX
Processor Speed   25/33/40/50/66(internal)MHz
Chip Set          OPTI
Max. Onboard DRAM 64MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        249mm x 218mm
I/O Options       32-bit VESA local bus slots (2),
NPU Options       80387DX

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Power LED & keylock         J1       Turbo LED                   J5

  Speaker                     J2       External battery            J6

  Turbo switch                J3       32-bit VESA Local bus       S1
                                       slots

  Reset switch                J4       32-bit VESA Local bus       S2
                                       slots

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   Monitor type select color             JP21                open

      Monitor type select                   JP21               closed
      monochrome

  »   Factory configured - do not           JP23                open
      alter

              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

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

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

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

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

      64MB        (4) 16M x 9        NONE

                            CACHE CONFIGURATION

     Size          Bank 0         Bank 1        TAG(U18)       TAG(U19)

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

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

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

    256KB       (4) 32K x 8     (4) 32K x 8    (1) 32K x 8       NONE

                      CACHE SIZE JUMPER CONFIGURATION

    Size           JP10           JP11            JP16           JP17

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

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

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

                  80386 AND CX80486DLC CPU CONFIGURATION

    Speed         JP6          JP7          JP8        JP9        JP22

    33MHz       closed       closed        open      pins 2 &     open
                                                        3

    33MHz       closed       closed        open      pins 2 &     open
                                                        3

    40MHz       closed       closed       closed     pins 2 &     open
                                                        3

  Note:Pins designated should be in the closed position.

                               CPU TYPE SELECT

    CPU Type      JP2    JP14     JP15     JP18    JP19   JP20   JP25   JP27

  80386DX(PQFP)   N/A    open     open     N/A     N/A    2 &    1 &    1 &
                                                           3      2      2

  80386DX(PGA)    N/A    open    closed    N/A     N/A    2 &    1 &    1 &
                                                           3      2      2

  80486DLC(PGA)   N/A   closed   closed    N/A     N/A    1 &    2 &    2 &
                                                           2      3      3

  80486SX(PGA)    open  closed   closed    open     2 &   1 &    2 &    2 &
                                                    3      2      3      3

    80487SX       2 &    N/A      N/A     closed    1 &   N/A    N/A    N/A
                   3                                2

    80486DX       1 &   closed   closed   closed    1 &   1 &    2 &    2 &
                   2                                2      2      3      3

    ODP80486      2 &   closed   closed   closed    1 &   1 &    2 &    2 &
                   3                                2      2      3      3

    80486DX2      1 &   closed   closed   closed    1 &   1 &    2 &    2 &
                   2                                2      2      3      3

  Note:Pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

   CPU Type      JP6         JP7          JP8         JP9         JP22

    25MHz        open        open         open      pins 1 &     closed
                                                       2

    33MHz        open        open        closed     pins 1 &      open
                                                       2

    40MHz        open       closed       closed     pins 1 &      open
                                                       2

   50i MHz       open        open         open      pins 1 &     closed
                                                       2

    50MHz        open       closed        open      pins 1 &      open
                                                       2

   66i MHz       open        open        closed     pins 1 &      open
                                                       2

  Note:Pins designated should be in the closed position.