DELL COMPUTER CORPORATION

System 425E/433E

Processor         80486DX
Processor Speed   25/33MHz
Chip Set          VLSI
Max. Onboard DRAM 32MB
Cache             None
BIOS              AMI
Dimensions        353mm x 291mm
I/O Options       Parallel port, serial ports (2)
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Serial port one            COM1      Power LED & keylock        KYLCK

  Serial port two            COM2      Parallel port              LPT1

  Reset switch                J20      Speaker                    SPKR

  Keyboard                    KBD

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not              JM2             Open
      alter

  »   Monitor type select color                JM4           pins 2 & 3
                                                              closed

      Monitor type select monochrome           JM4           pins 1 & 2
                                                              closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     2MB         (2) 256K x       NONE           NONE           NONE
                    36

     4MB         (2) 256K x    (2) 256K x        NONE           NONE
                    36             36

     6MB         (2) 256K x    (2) 256K x     (2) 256K x        NONE
                    36             36             36

     8MB         (2) 256K x    (2) 256K x     (2) 256K x    (2) 256K x 36
                    36             36             36

     8MB        (2) 1M x 36       NONE           NONE           NONE

     10MB       (2) 1M x 36    (2) 256K x        NONE           NONE
                                   36

     12MB       (2) 1M x 36    (2) 256K x     (2) 256K x        NONE
                                   36             36

     14MB       (2) 1M x 36    (2) 256K x     (2) 256K x    (2) 256K x 36
                                   36             36

     16MB       (2) 1M x 36   (2) 1M x 36        NONE           NONE

     18MB       (2) 1M x 36   (2) 1M x 36     (2) 256K x        NONE
                                                  36

     20MB       (2) 1M x 36   (2) 1M x 36     (2) 256K x    (2) 256K x 36
                                                  36

     24MB       (2) 1M x 36   (2) 1M x 36    (2) 1M x 36        NONE

     28MB       (2) 1M x 36   (2) 1M x 36    (2) 1M x 36    (2) 256K x 36

     32MB       (2) 1M x 36   (2) 1M x 36    (2) 1M x 36     (2) 1M x 36

            DRAM JUMPER CONFIGURATION

   Size     J26A      J26B      J26C      J26D

   2MB     Closed      N/A      N/A       N/A

   4MB     Closed    Closed     N/A       N/A

   6MB     Closed    Closed    Closed     N/A

   8MB     Closed    Closed    Closed    Closed

   8MB      Open       N/A      N/A       N/A

   10MB     Open     Closed     N/A       N/A

   12MB     Open     Closed    Closed     N/A

   14MB     Open     Closed    Closed    Closed

   16MB     Open      Open      N/A       N/A

   18MB     Open      Open     Closed     N/A

   20MB     Open      Open     Closed    Closed

   24MB     Open      Open      Open      N/A

   28MB     Open      Open      Open     Closed

   32MB     Open      Open      Open      Open