
DELL COMPUTER CORPORATION

SYSTEMS 4XX/L(V), 4XX/MX(V) OPTIPLEX

Processor         80486SX/80486DX/80486DX2
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          Headland
Max. Onboard DRAM 64MB
Cache             128KB (on external cache card)
BIOS              Unidentified
Dimensions        330mm x 218mm
I/O Options       32-bit external cache card, 32-bit VESA local bus slot,
                  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        Floppy drive              CN8
                                       interface

  Serial port 1             CN2        IDE interface             CN9

  Serial port 2             CN3        External battery           J3

  Parallel port             CN4        Control panel              J4
                                       connector

  VGA port                  CN5        IDE interface LED          J5

  Video memory              CN6        Riser Card                SL1
  upgrade module

  VGA feature               CN7        32-bit VESA Local         SL2
  connector                            bus/cache slot

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     VESA riser card disabled              J1 & J2           Closed

      VESA riser card enabled               J1 & J2            Open

     IDE IRQ enabled                          J6           pins 2 & 3
                                                              closed

      IDE IRQ disabled                         J6           pins 1 & 2
                                                              closed

     Factory configured - do not              J7              Open
      alter

     PS/2 mouse (IRQ12) enabled               J8             Closed

      PS/2 mouse (IRQ12) disabled              J8              Open

     Factory configured - do not              J9              Open
      alter

     Factory configured - do not             J10              Open
      alter

     Flash BIOS write protect                J11             Closed
      disabled

      Flash BIOS write protect enabled        J11              Open

     CPU type select PGA                     J12             Closed

      CPU type select PQFP                    J12              Open

     CMOS memory normal operation            J13             Closed

      CMOS memory clear                       J13              Open

     I/O controller address select           J14             Closed
      26Eh-26Fh

      I/O controller address select           J14              Open
      398h-399h

     Factory configured - do not             J15              Open
      alter

     On board VGA enabled                    J16             Closed

      On board VGA disabled                   J16              Open

     Factory configured - do not             J17              Open
      alter

     Factory configured - do not             J18              Open
      alter

     Factory configured - do not             J20              Open
      alter

     Factory configured - do not             J22              Open
      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

  VESA CPU SPEED CONFIGURATION

   Speed       J19       J21

   25MHz      Open      Closed

   33MHz     Closed      Open

  50iMHz      Open      Closed

  66iMHz     Closed      Open

                        VIDEO MEMORY CONFIGURATION

       Size             Bank 0            Bank 1               CN6

      512KB          (4) 128K x 8          NONE               NONE

       1MB           (4) 128K x 8      (4) 128K x 8           NONE

       2MB           (4) 128K x 8      (4) 128K x 8       Memory module

            Note: Bank 0 is factory installed and is not configurable. To
            enable 2MB video memory, install memory module over Bank 1 in
            CN6 connectors.

