
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

