DELL COMPUTER CORPORATION
=========================

   4000/XE SERIES

   Processor    80486DX/80486DX2/Pentium (with pentium processor  
                upgrade board)                                    
   Processor    25/33/50(internal)/60/66(internal)MHz             
   Speed        
   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                                              

<gopher://bitreich.org/I/th99/m/C-D/31917-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose         | Location | Purpose            | Location |
   |-----------------+----------+--------------------+----------|
   | VGA port        |   CN1    | IDE interface      |   CN6    |
   |-----------------+----------+--------------------+----------|
   | Parallel port   |   CN2    | Floppy drive       |   CN7    |
   |                 |          | interface          |          |
   |-----------------+----------+--------------------+----------|
   | Serial port 2   |   CN3    | Riser Card         |   CN8    |
   |-----------------+----------+--------------------+----------|
   | Serial port 1   |   CN4    | Cache card         |   CN9    |
   |                 |          | connector          |          |
   |-----------------+----------+--------------------+----------|
   | 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.  |
   +------------------------------------------------------------+