DELL COMPUTER CORPORATION

4000/XE SERIES

Processor        80486DX/80486DX2/Pentium (with pentium processor upgrade
                 board)
Processor Speed  25/33/50(internal)/60/66(internal)MHz
Chip Set         Intel
Max. Onboard     128MB
DRAM
Cache            128KB
BIOS             Phoenix
Dimensions       330mm x 218mm
I/O Options      External cache card, floppy drive interface,

                 IDE interface, parallel port, PS/2 mouse port,

                 riser card, serial ports (2),VGA port
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  VGA port                   CN1      IDE interface                CN6

  Parallel port              CN2      Floppy drive interface       CN7

  Serial port 2              CN3      Riser Card                   CN8

  Serial port 1              CN4      Cache card connector         CN9

  PS/2 mouse port            CN5      External battery            JBAT

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

  »   Factory configured - do not alter       30MHz             N/A

  »   AT ROM card disabled                     ATRM            Open

      AT ROM card enabled                      ATRM           Closed

  »   System video BIOS clear disabled         CLRB            Open

      System video BIOS clear enabled          CLRB           Closed

  »   EISA configuration utility               CLRE            Open
      settings are enabled

      EISA configuration utility               CLRE           Closed
      settings are disabled

  »   Flash BIOS & EISA configuration          EFLU           Closed
      utlity upgraded by floppy

      Flash BIOS & EISA configuration          EFLU            Open
      utlity not upgraded by floppy

  »   Password feature enabled                 EPWD           Closed

      Password feature disabled                EPWD            Open

  »   Monitor type select VGA enabled          EVGA           Closed

      Monitor type select VGA disabled         EVGA            Open

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

      I/O controller uses address             IOALT           Closed
      398h-399h

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         NONE

       4MB        (2) 256K x 36    (2) 256K x 36

       4MB        (2) 512K x 36         NONE

       8MB        (2) 512K x 36    (2) 512K x 36

       8MB         (2) 1M x 36          NONE

      16MB         (2) 1M x 36      (2) 1M x 36

      16MB         (2) 2M x 36          NONE

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

      32MB         (2) 4M x 36          NONE

      64MB         (2) 4M x 36      (2) 4M x 36

      64MB         (2) 16M x 36         NONE

      128MB        (2) 16M x 36     (2) 16M x 36

         VIDEO MEMORY CONFIGURATION

         Size                  VRAM

         1MB                (4) 44256

  Note:System comes with 512KB installed.

                  CPU SPEED CONFIGURATION

       Speed               25MHz               33MHz

   80486DX/25MHz          Closed               Open

   80486DX2/33MHz          Open               Closed

  80486DX/50i MHz         Closed               Open

  80486DX2/66i MHz         Open               Closed

                       MISCELLANEOUS TECHNICAL NOTE

   Pentium processor upgrade board replaces existing processor and has no
   jumpers. The external cache is not required as 256KB cache is included
                           on the upgrade board.