DELL COMPUTER CORPORATION

SYSTEM XPS 50/66 FS/MDT

Processor          80486DX2
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, parallel port, PS/2 mouse
                   port, serial ports (2)
NPU Options        None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  PS/2 mouse port            CN1       Serial port 2              J16

  Floppy drive               CN2       Speaker                    J33
  interface

  IDE interface              CN3       Power LED & keylock        J34

  External battery           CN4       IDE interface LED          W11

  Serial port 1              J12       Reset switch               W12

  Parallel port              J15       32-bit VESA Local bus   J29 & J30
                                       slots

                        USER CONFIGURABLE SETTINGS

              Function                   Jumper/Switch        Position

  »   Factory configured - do not             W1                Open
      alter

  »   Parallel port bidirectional             W5             pins 2 & 3
                                                               closed

      Parallel port unidirectional            W5             pins 1 & 2
      (printer)                                                closed

  »   Monitor type select color               W6               Closed

      Monitor type select monochrome          W6                Open

  »   Factory configured - do not             W7               Closed
      alter

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

  »   Factory configured - do not             W20            pins 2 & 3
      alter                                                    closed

  »   Factory configured - do not             W31               Open
      alter

  »   Factory configured - do not             W40            pins 2 & 3
      alter                                                    closed

  »   Factory configured - do not             W70            pins 2 & 3
      alter                                                    closed

  »   Factory configured - do not             W71               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

                 CACHE JUMPER CONFIGURATION

   Size       W64       W65       W66       W67       W68

  128KB      2 & 3     1 & 2     1 & 2     1 & 2     2 & 3

  256KB      2 & 3     2 & 3     2 & 3     2 & 3     2 & 3

  Note: pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

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

   50iMHz     Closed         Factory         Factory           Factory
                           configured      configured        configured

   66iMHz      Open          Factory         Factory           Factory
                           configured      configured        configured