DELL COMPUTER CORPORATION

DIMENSION XPS XXX

Processor          80486DX2/80486DX4
Processor Speed    50(internal)/66(internal)MHz
Chip Set           MIC
Max. Onboard DRAM  64MB
Cache              128/256KB
BIOS               Unidentified
Dimensions         330mm x 218mm
I/O Options        32-bit VESA local bus slots (2), floppy drive
                   interface, IDE interface (2), parallel port, PS/2 mouse
                   port, serial ports (2)
NPU Options        None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Serial port 1              CN1       Parallel port              J16

  IDE interface 1            CN2       Speaker                    J33

  IDE interface 2            CN3       Power LED & keylock        J34

  Floppy drive               CN4       IDE interface LED          W11
  interface

  Serial port 2              CN5       Reset switch               W12

  PS/2 mouse port            J13       32-bit VESA Local bus   J29 & J30
                                       slots

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch        Position

  »   Factory configured - do not            W1               Closed
      alter

  »   Monitor type select color              W2               Closed

      Monitor type select                    W2                Open
      monochrome

  »   Mouse IRQ12 enabled                    W3               Closed

      Mouse IRQ12 disabled                   W3                Open

  »   Clear NVRAM disabled                   W5                Open

      Clear NVRAM enabled                    W5               Closed

  »   Factory configured - do not            W8              Pins 2 & 3
      alter                                                   closed

  »   Factory configured - do not            W10             Pins 2 & 3
      alter                                                   closed

  »   Factory configured - do not            W11             Pins 2 & 3
      alter                                                   closed

  »   Processor is Intel486 DX,              W12             Pins 1 & 2
      DX2, DX4, Pentium or Pentium                            closed
      Pro

      Processor is Intel486 SX               W12             Pins 2 & 3
                                                              closed

  »   Factory configured - do not            W13               Open
      alter

  »   Factory configured - do not            W16             Pins 2 & 3
      alter                                                   closed

  »   Factory configured - do not            W17             Pins 2 & 3
      alter                                                   closed

  »   Factory configured - do not            W18               Open
      alter

  »   Factory configured - do not            W19              Closed
      alter

  »   Factory configured - do not            W22             Pins 2 & 3
      alter                                                   closed

  »   Factory configured - do not            W23             Pins 2 & 3
      alter                                                   closed

  »   Factory configured - do not            W24             Pins 2 & 3
      alter                                                   closed

  »   Factory configured - do not            W25               Open
      alter

  »   IDE port 1 enabled                     W34             Pins 1 & 2
                                                              closed

      IDE port 1 disabled                    W34             Pins 2 & 3
                                                              closed

  »   Factory configured - do not            W35               Open
      alter

  »   Parallel port IRQ = 7                  W36             Pins 1 & 2
                                                              closed

      Parallel port IRQ = 5                  W36             Pins 2 & 3
                                                              closed

  »   ECP DMA = 3                            W37             Pins 2 & 3
                                                              closed

      ECP DMA = 1                            W37             Pins 1 & 2
                                                              closed

  »   ECP DMA = 3                            W38             Pins 2 & 3
                                                              closed

      ECP DMA = 1                            W38             Pins 1 & 2
                                                              closed

  »   Factory configured - do not            W39               Open
      alter

  »   Factory configured - do not            W40               Open
      alter

  »   Factory configured - do not           SW1/2             Closed
      alter

  »   Factory configured - do not           SW1/3              Open
      alter

  »   Factory configured - do not           SW1/4              Open
      alter

  Note: The locations of the factory confugured jumpers is unidentified.

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

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

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

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

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

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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     128KB      (4) 32K x 8        NONE       (2) 16K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (2) 16K x 8

                          CPU SPEED CONFIGURATION

   Speed       SW1/1         SW1/2            SW1/3            SW1/4

   50iMHz      Open          Factory         Factory           Factory
                           configured      configured        configured

   66iMHz     Closed         Factory         Factory           Factory
                           configured      configured        configured