
DELL COMPUTER CORPORATION

SYSTEM V486/XX REV. 1

Processor         80486SX/80486DX/80486DX2/Overdrive
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          Opti
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI
Dimensions        330mm x 218mm
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Turbo LED                   J9       Speaker                     J21

  External battery            J18      Power LED and keylock       J22

  Turbo Switch                J20

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Battery type select - internal           W1             Closed

      Battery type select - external           W1              Open

     CMOS memory normal operation             W2           pins 1 & 2
                                                              closed

      CMOS memory clear                        W2           pins 2 & 3
                                                              closed

     Factory configured - do not              W3           pins 2 & 3
      alter                                                   closed

     Factory configured - do not              W4           pins 2 & 3
      alter                                                   closed

     Monitor type select color               W12           pins 1 & 2
                                                              closed

      Monitor type select monochrome          W12           pins 2 & 3
                                                              closed

     Factory configured - do not             W13              Open
      alter

           DRAM CONFIGURATION

     Size        Bank 0        Bank 1

     4MB        (4) 1M x 9      NONE

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

     16MB       (4) 4M x 9      NONE

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

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

     CACHE CONFIGURATION

     Size          Bank 0

     64KB        (8) 16K x4

     256KB      (8) 32K x 8

                        CACHE JUMPER CONFIGURATION

      Size               W8                 W9                 W10

       0KB              Open               Open               Open

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

      256KB           pins 1 & 2        pins 1 & 2      pins 1 & 2 closed
                       closed             closed

                              CPU TYPE SELECT

      CPU type              W5               W6                 W7

       486SX            pins 2 & 3        pins 2 & 3           Open
                          closed           closed

       487SX            pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed           closed             closed

       486DX            pins 1 & 2        pins 1 & 2        pins 2 & 3
                          closed           closed             closed

       486DX2           pins 1 & 2        pins 1 & 2        pins 2 & 3
                          closed           closed             closed

     Overdrive          pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed           closed             closed

