DELL COMPUTER CORPORATION

SYSTEM V486/XX SDT REV. 3

Processor         80486SX/80486DX/80486DX2
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          LSI
Max. Onboard DRAM 64MB
Cache             None
BIOS              Unidentified
Dimensions        330mm x 218mm
I/O Options       Floppy drive interface, IDE interface, parallel port,
                  PS/2 mouse port, serial ports (2), VGA port
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Parallel port              CN1       IDE interface              CN5
  connector

  Serial port 1              CN2       VGA connector              CN6

  Serial port 2              CN2       Fan connector              CN7

  PS/2 mouse port            CN3       IDE interface LED          CN8

  Floppy drive               CN4       External battery           CN9
  interface                            connector

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Mouse connector enabled at IRQ12         J1             Closed

      Mouse connector disabled                 J1              Open

  »   I/O address is 26Eh-26Fh                 J2             Closed

      I/O address is 398h-399h                 J2              Open

  »   Factory configured do not alter          J3              Open

  »   Factory configured do not alter          J4             Closed

  »   Enables password feature                 J5             Closed

      Disables password feature                J5             Closed

  »   Enables on-board VGA controller          J6             Closed

      Disables on-board VGA controller         J6              Open

  »   Factory configured do not alter          J7              Open

  »   Factory configured do not alter         J10              Open

  »   Factory configured do not alter         J11              Open

                           DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2        Bank 3

     4MB        (1) 1M x 36       NONE           NONE          NONE

     8MB        (1) 1M x 36   (1) 1M x 36        NONE          NONE

     12MB       (1) 1M x 36   (1) 1M x 36    (1) 1M x 36       NONE

     16MB       (1) 1M x 36   (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

     16MB       (1) 4M x 36       NONE           NONE          NONE

     20MB       (1) 4M x 36   (1) 1M x 36        NONE          NONE

     24MB       (1) 4M x 36   (1) 1M x 36    (1) 1M x 36       NONE

     28MB       (1) 4M x 36   (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

     32MB       (1) 4M x 36   (1) 4M x 36        NONE          NONE

     36MB       (1) 4M x 36   (1) 4M x 36    (1) 1M x 36       NONE

     40MB       (1) 4M x 36   (1) 4M x 36    (1) 1M x 36    (1) 1M x 36

     48MB       (1) 4M x 36   (1) 4M x 36    (1) 4M x 36       NONE

     52MB       (1) 4M x 36   (1) 4M x 36    (1) 4M x 36    (1) 1M x 36

     64MB       (1) 4M x 36   (1) 4M x 36    (1) 4M x 36    (1) 4M x 36

   CPU SPEED CONFIGURATION

  Speed       J8        J9

  25MHz      Open     Closed

  33MHz     Closed     Open

  50iMHz     Open     Closed

  66iMHz    Closed     Open

                    VRAM CONFIGURATION

       Size               Bank 0             Bank 1

       512K            (4) 256K x 4           None

        1MB            (4) 256K x 4       (4) 256K x 4

  Note:Bank 0 is factory installed and not configurable.