DELL COMPUTER CORPORATION

486/MT

Processor     80486SX/80486SX2/80486DX/80486DX2/80486DX4
Processor     25/33/50(internal)/66(internal)/100(internal)MHz
Speed
Chip Set      OPTI
Max. Onboard  64MB
DRAM
Cache         128/256KB
BIOS          Phoenix
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),
              VGA feature connector, VGA port
NPU Options   None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  PS/2 mouse port            CN1       VGA port                   CN8

  Serial port 1              CN2       VGA feature connector      CN9

  Serial port 2              CN3       Reset switch                J1

  External battery           CN4       Power LED & keylock         J2

  Parallel port              CN5       Speaker                     J3

  IDE interface              CN6       IDE interface LED           J4

  Floppy drive               CN7       32-bit VESA Local bus   SL1 & SL2
  interface                            slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   On board VGA enabled                    JP1              Open

      On board VGA disabled                   JP1             Closed

  »   RAMDAC shadow disabled                  JP2              Open

      RAMDAC shadow enabled                   JP2             Closed

  »   Factory configured - do not             JP3              Open
      alter

  »   Factory configured - do not             JP4             Closed
      alter

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

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

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

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

     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       (1) 8K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

      Size               JP8                JP9                JP12

      128KB           pins 1 & 2         pins 1 & 2            Open
                       closed              closed

      256KB           pins 2 & 3         pins 2 & 3           Closed
                       closed              closed

                          CPU TYPE CONFIGURATION

      Type           JP10          JP13          JP14            JP15

    80486SX         Closed         Open          Open         pins 2 & 3
                                                                closed

    80486SX2        Closed        Closed         Open         pins 2 & 3
                                                                closed

    80486DX         Closed        Closed       pins 1 & 2     pins 1 & 2
                                                closed          closed

    80486DX2        Closed        Closed       pins 1 & 2     pins 1 & 2
                                                closed          closed

    80486DX4        Closed        Closed       pins 1 & 2     pins 1 & 2
                                                closed          closed

          CPU SPEED CONFIGURATION

   Speed      JP5        JP6        JP7

   25MHz     Closed      Open     Closed

   33MHz      Open      Closed    Closed

  50iMHz     Closed      Open     Closed

  66iMHz      Open      Closed    Closed

  100iMHz     Open      Closed    Closed

                  VIDEO MEMORY CONFIGURATION

        Size                Bank 0               Bank 1

        512KB            (4) 256K x 4             NONE

         1MB             (4) 256K x 4         (4) 256K x 4

  Note: Bank 0 is factory installed and is not configurable.