DELL COMPUTER CORPORATION

SYSTEM 40XX/XE

Processor            80486DX/80486DX2
Processor Speed      33/50(internal)/66(internal)MHz
Chip Set             Intel
Video Chip Set       Unidentified
Maximum Onboard      128MB
Memory
Maximum Video Memory 1MB
Cache                Unidentified
BIOS                 Unidentified
Dimensions           330mm x 218mm
I/O Options          Floppy drive interface, IDE interface, parallel port,
                     PS/2 mouse port, serial ports (2), feature connector,
                     VGA port, riser slot, cache slot
NPU Options          None

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                 Location

  Feature connector          CN1       External battery          JBAT

  PS/2 mouse port            CN2       Front panel               JCTRL
                                       connector

  Serial port 2              CN3       IDE interface LED         JLED

  Serial port 1              CN4       Power staging             PROUT
                                       connector (out)

  Parallel port              CN5       Power staging             PWRIN
                                       connector (in)

  VGA port                   CN6       Riser slot                 SL1

  IDE interface              CN7       Cache slot                 SL2

  Floppy drive               CN8
  interface

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  »   Factory configured - do not          30MHZ         Unidentified
      alter

  »   AT ROM card disabled                 ATRM              Open

      AT ROM card enabled                  ATRM             Closed

  »   System/video BIOS normal             CLRB              Open
      operation

      System/video BIOS clear              CLRB             Closed

  »   Flash BIOS normal operation          CLRE              Open

      Flash BIOS clear                     CLRE             Closed

  »   Factory configured - do not           CN9          Unidentified
      alter

  »   Flash BIOS upgradable with a         EFLU             Closed
      diskette

      Flash BIOS not upgradable with       EFLU              Open
      a diskette

  »   Password enabled                     EPWD             Closed

      Password disabled                    EPWD              Open

  »   On board video enabled               EVGA             Closed

      On board video disabled              EVGA              Open

  »   I/O controller address select        IOALT             Open
      26Eh - 26Fh

      I/O controller address select        IOALT            Closed
      398h - 398Fh

  »   Factory configured - do not           J1           Unidentified
      alter

  »   Factory configured - do not           J2           Unidentified
      alter

  »   Factory configured - do not           J3           Unidentified
      alter

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     4MB        (1) 512K x     (1) 512K x        None           None
                    36             36

     6MB       (1) 1M x 36     (1) 512K x        None           None
                                   36

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

     12MB      (1) 1M x 36    (1) 1M x 36     (1) 512K x    (1) 512K x 36
                                                  36

     16MB      (1) 2M x 36    (1) 2M x 36        None           None

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

     20MB      (1) 2M x 36    (1) 2M x 36     (1) 512K x    (1) 512K x 36
                                                  36

     24MB      (1) 2M x 36    (1) 2M x 36    (1) 1M x 36     (1) 1M x 36

                        DRAM CONFIGURATION (CON’T)

     Size          Bank 0        Bank 1        Bank 2          Bank 3

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

     32MB        (1) 2M x 36   (1) 2M x 36   (1) 2M x 36     (1) 2M x 36

     36MB        (1) 4M x 36   (1) 4M x 36    (1) 512K x    (1) 512K x 36
                                                 36

     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) 2M x 36     (1) 2M x 36

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

     64MB        (1) 8M x 36   (1) 8M x 36      None            None

     68MB        (1) 8M x 36   (1) 8M x 36    (1) 512K x    (1) 512K x 36
                                                 36

     72MB        (1) 8M x 36   (1) 8M x 36   (1) 1M x 36     (1) 1M x 36

     80MB        (1) 8M x 36   (1) 8M x 36   (1) 2M x 36     (1) 2M x 36

     96MB        (1) 8M x 36   (1) 8M x 36   (1) 4M x 36     (1) 4M x 36

     128MB       (1) 8M x 36   (1) 8M x 36   (1) 8M x 36     (1) 8M x 36

  Note: The location of banks 0, 1, 2 & 3 are unidentified.

                   CACHE CONFIGURATION

  Note: The size of the cache modules are unidentified.

                        VIDEO MEMORY CONFIGURATION

          Size                    Bank 0                   Bank 1

          512KB                   512KB                     None

           1MB                    512KB                    512KB

  Note: The location of banks 0 & 1 are unidentified. The size of the
  chips are unidentified.

     CPU SPEED SELECTION

  Speed     25MHZ     33MHZ

  33MHz      Open     Closed

  50iMHz    Closed     Open

  66iMHz     Open     Closed