DELL COMPUTER CORPORATION

SYSTEM 4XX/P NETPLEX

Processor        80486SX/80486DX/80486DX2
Processor Speed  25/33/50(internal)/50/66(internal)MHz
Chip Set         SIS
Max. Onboard     32MB
DRAM
Cache            128KB
BIOS             Phoenix
Dimensions       330mm x 218mm
I/O Options      Bus mouse port, floppy drive interface, IDE interface,
                 parallel port, riser card slot, serial ports (2), VGA
                 feature connector, VGA port
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  Bus mouse port             CN1      VGA feature connector        CN6

  Serial port 1              CN2      IDE interface LED            CN7

  Serial port 2              CN3      Floppy drive interface       CN8

  Parallel port              CN4      IDE interface LED            JP5

  VGA port                   CN5      Riser card slot              S1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   VGA IRQ9 disabled                       JP1              Open

      VGA IRQ9 enabled                        JP1             Closed

  »   Monitor type select color               JP2             Closed

      Monitor type select monochrome          JP2              Open

  »   Password enabled                        JP7             Closed

      Password disabled                       JP7              Open

       PARALLEL PORT CONFIGURATION

        Port                 JP6

     LPT 1/IRQ7       pins 1 & 2 closed

     LPT 1/IRQ5       pins 2 & 3 closed

     LPT 3/IRQ7       pins 1 & 2 closed

      Disabled               Open

                DRAM CONFIGURATION

      Size            Bank 1           Bank 2

       4MB         (1) 1M x 36          NONE

       5MB         (1) 1M x 36     (1) 256K x 36

       8MB         (1) 1M x 36      (1) 1M x 36

      16MB         (1) 4M x 36          NONE

      17MB         (1) 4M x 36     (1) 256K x 36

      20MB         (1) 4M x 36      (1) 1M x 36

      32MB         (1) 4M x 36      (1) 4M x 36

                   VIDEO RAM CONFIGURATION

        Size               Bank 0               Bank 1

       512KB            (4) 256KB x 4            NONE

        1MB             (4) 256KB x 4       (4) 256KB x 4

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

  CPU SPEED CONFIGURATION

  CPU speed        JP3

    25MHz         Closed

    33MHz          Open

    50iMHz        Closed

    66iMHz         Open

                CPU TYPE SELECT

  CPU type    JP4 A-C     JP4D-F      JP4G-I

  80486SX     Closed       Open        Open

  80487SX      Open        Open       Closed

  80486DX      Open       Closed       Open

  80486DX2     Open       Closed       Open