
DELL COMPUTER CORPORATION

DIMENSION XPS XXX MDT II

Device Type Mainboard
Processor   80486SX/80486DX/80486DX2/80486DX4/P24T
Processor   25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set    Unidentified
Maximum     64MB
Onboard
Memory
Cache       256KB
BIOS        Unidentified
Dimensions  330mm x 218mm
I/O Options 32-bit VESA local bus slots (2), floppy drive interface, IDE
            interfaces (2), parallel port, PS/2 mouse port, serial ports
            (2)

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Turbo LED                   C1       Serial port 1               CN2

  Turbo switch                C2       IDE interface 2             CN3

  Speaker                     C3       IDE interface 1             CN4

  Reset switch                C4       Floppy drive                CN5
                                       interface

  Power LED & keylock         C5       PS/2 mouse port             J13

  IDE interface LED           C6       Parallel port               J16

  Serial port 2              CN1       32-bit VESA local bus    SL1 & SL2
                                       slots

                        USER CONFIGURABLE SETTINGS

                Function                      Label          Position

     Factory configured - do not alter        W1             Closed

     Monitor type select color                W2             Closed

      Monitor type select monochrome           W2              Open

     PS/2 mouse IRQ12 enabled                 W3             Closed

      PS/2 mouse IRQ12 disabled                W3              Open

     CMOS memory normal operation             W5              Open

      CMOS memory clear                        W5             Closed

     Factory configured - do not alter        W8           Pins 1 & 2
                                                              closed

     Factory configured - do not alter        W10          Pins 1 & 2
                                                              closed

     Factory configured - do not alter        W11          Pins 1 & 2
                                                              closed

     Factory configured - do not alter        W13             Open

     Factory configured - do not alter        W16          Pins 1 & 2
                                                              closed

     Factory configured - do not alter        W17          Pins 1 & 2
                                                              closed

     Factory configured - do not alter        W18             Open

     Factory configured - do not alter        W19            Closed

     Factory configured - do not alter        W22          Pins 1 & 2
                                                              closed

     Factory configured - do not alter        W23          Pins 1 & 2
                                                              closed

     Factory configured - do not alter        W24          Pins 1 & 2
                                                              closed

     Factory configured - do not alter        W25             Open

     IDE interface 1 enabled                  W34          Pins 2 & 3
                                                              closed

      IDE interface 1 disabled                 W34          Pins 1 & 2
                                                              closed

     Factory configured - do not alter        W35             Open

     Parallel port IRQ select IRQ7            W36          Pins 2 & 3
                                                              closed

      Parallel port IRQ select IRQ5            W36          Pins 1 & 2
                                                              closed

     Factory configured - do not alter        W39             Open

     Factory configured - do not alter        W40             Open

     Factory configured - do not alter       SW1/2             On

     Factory configured - do not alter       SW1/3             Off

     Factory configured - do not alter       SW1/4             Off

  Note: The location of the factory configured jumpers are unidentified.

                         SIMM 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) 4M x 36      None          None         None

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

     20MB      (1) 4M x 36  (1) 1M x 36       None         None

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

     28MB      (1) 4M x 36  (1) 1M x 36   (1) 1M x 36   (1) 1M x 36

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

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

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

     52MB      (1) 1M x 36  (1) 4M x 36   (1) 4M x 36   (1) 4M x 36

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

     CACHE CONFIGURATION

     Size          Bank 0

     256KB      (8) 32K x 8

  CPU SPEED SELECTION

   Speed       SW1/1

   25MHz        Off

   33MHz        On

   50iMHz       Off

   66iMHz       On

   75iMHz       Off

  100iMHz       On

            CPU TYPE SELECTION

        Type                 W12

       80486SX        Pins 2 & 3 closed

       80486DX        Pins 1 & 2 closed

      80486DX2        Pins 1 & 2 closed

      80486DX4        Pins 1 & 2 closed

        P24T          Pins 1 & 2 closed

                   DMA CHANNEL SELECTION

       Channel              W37                 W38

          1              Pins 2 & 3         Pins 2 & 3
                           closed             closed

          3             Pins 1 & 2         Pins 1 & 2
                           closed             closed

