DELL COMPUTER CORPORATION

4XX/ME, 4XXS/ME

Processor         80486SX/80486DX/80486DX2
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          Intel
Max. Onboard DRAM 64MB
Cache             128KB (on external cache card)
BIOS              Phoenix
Dimensions        330mm x 218mm
I/O Options       Floppy drive interface, IDE interface, parallel port,
                  PS/2 mouse port, serial ports (2), VGA feature connector,
                  VGA port
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  PS/2 mouse port             CN1      IDE interface               CN8

  Serial port 1               CN2      IDE interface LED           J1

  Serial port 2               CN3      Chassis fan power           J2

  Parallel port               CN4      External battery            J3

  VGA port                    CN5      Front panel connector       J4

  VGA feature connector       CN6      External cache card         SL1
                                       slot

  Floppy drive interface      CN7

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

  »   External cache card not installed        JP1             Open
      (486/M mainboard only)

      External cache card installed            JP1            Closed
      (486/M mainboard only)

  »   Password enabled                         JP2            Closed

      Password disabled                        JP2             Open

  »   Factory configured - do not alter        JP3             Open

  »   BIOS & EISA upgrade from diskette        JP4            Closed
      enabled

      BIOS & EISA upgrade from diskette        JP4             Open
      disabled

  »   On board VGA enabled                     JP5            Closed

      On board VGA disabled                    JP5             Open

  »   EISA configuration retained at           JP7             Open
      boot

      EISA configuration cleared at            JP7            Closed
      boot

  »   Factory configured - do not alter        JP11            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          JP6

    25MHz         Closed

    33MHz          Open

    50iMHz        Closed

    66iMHz         Open

                  VIDEO MEMORY CONFIGURATION

     Wait states            Bank 0               Bank 1

        512KB            (4) 256K x 4             NONE

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

  Note: Bank 0 is factory installed and is not configurable.