UNIDENTIFIED

486L

Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33/50MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 220mm
I/O Options       Local bus slot
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J1       Reset switch               J16

  Power LED & keylock         J13       Turbo LED                  J17

  Speaker                     J14       Local bus slot             SL1

  Turbo switch                J15

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Battery type select internal             J1           pins 1 & 2
                                                              closed

      Battery type select external             J1             Closed

  »   Monitor type select color                J2             Closed

      Monitor type select monochrome           J2              Open

  »   ATCLK select CLKI/6                      J3             Closed

      ATCLK select CLKI/4                      J3              Open

      Phase frequency select single            J6           pins 1 & 2
      phase                                                   closed

      Phase frequency select double            J6           pins 2 & 3
      phase                                                   closed

              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

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

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

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1         TAG 0          TAG 1

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8     (1) 16K x 4

     128KB      (4) 32K x 8        NONE       (1) 8K x 8     (1) 16K x 4

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8    (1) 16K x 4

                        CACHE JUMPER CONFIGURATION

     Size           J4             J5            J10             J12

     64KB          Open           Open        pins 2 & 3         Open
                                                closed

    128KB          Open          Closed       pins 1 & 2        Closed
                                                closed

    256KB         Closed         Closed       pins 2 & 3        Closed
                                                closed

                          CPU TYPE CONFIGURATION

       Type                J7                J8               JP10

      80486SX          pins 2 & 3           Open              Open
                         closed

      80487SX          pins 1 & 2          Closed             Open
                         closed

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

                           CHIPSET CONFIGURATION

           Type                       J9                     J11

  »          82C495           pins 1 & 2 closed       pins 1 & 2 closed

  »          82C493           pins 2 & 3 closed       pins 2 & 3 closed