
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.

