UNIDENTIFIED

486S

Processor          80486SX
Processor Speed    25MHz
Chip Set           OPTI
Max. Onboard DRAM  8MB
Cache              None
BIOS               AMI
Dimensions         330mm x 218mm
I/O Options        32-Bit external DRAM/SRAM card slot
NPU Options        None

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                  Location

  External battery          J1        Reset switch 2              J12

  Power LED & keylock      J10        Reset switch 1              J13

  Speaker                  J11        32-Bit external             S1
                                      DRAM/SRAM card

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation             J2            pins 1 & 2
                                                              closed

      CMOS memory clear                        J2            pins 2 & 3
                                                              closed

  »   Monitor type select color                J3             Closed

      Monitor type select monochrome           J3              Open

  »   Reset select J13 (Reset 1)               J5            pins 1 & 2
                                                              closed

      Reset select J12 (Reset 2)               J5            pins 2 & 3
                                                              closed

  »   Factory configured - do not alter        J6            pins 1 & 2
                                                              closed

  Note:Consult documentation provided with memory card for
  configurations.

              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

               CACHE CONFIGURATION

     Setting            J8               J9

  Not installed       Closed           Closed

    Installed          Open             Open