DELL COMPUTER CORPORATION

OMNIPLEX 4XX/ME

Processor   80486SX/80486DX/80486DX2/80486DX4
Processor   25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set    Intel
Video Chip  ATI
Set
Maximum     128MB
Onboard
Memory
Maximum     1MB
Video
Memory
Cache       256KB
BIOS        Unidentified
Dimensions  330mm x 218mm
I/O Options Floppy drive interface, IDE interface, parallel port, PS/2
            mouse port, serial ports (2), feature connector, VGA port,
            riser slot, cache slot
NPU Options None

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                 Location

  Feature connector         CN1        Thermal monitor           CN9
                                       board connector

  PS/2 mouse port           CN2        IDE interface LED          J1

  Serial port 1             CN3        Chassis fan power          J2

  Serial port 2             CN4        Speaker                    J3

  Parallel port             CN5        External battery           J4

  VGA port                  CN6        Audio connector            J5

  IDE interface             CN7        Riser slot                SL1

  Floppy drive              CN8        Cache slot                SL2
  interface

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  »   Factory configured - do not           BOOT             Open
      alter

  »   Factory configured - do not           CRD              Open
      alter

  »   EISA configuration normal             EISA             Open
      operation

      EISA configuration clear              EISA            Closed

  »   Factory configured - do not           JC1          Unidentified
      alter

  »   Factory configured - do not           JC2          Unidentified
      alter

  »   Factory configured - do not           JC3          Unidentified
      alter

  »   Factory configured - do not           JC4          Unidentified
      alter

  »   Factory configured - do not           JC5          Unidentified
      alter

  »   Factory configured - do not           JP2          Unidentified
      alter

  »   Factory configured - do not           JP4          Unidentified
      alter

  »   Factory configured - do not           JP5          Unidentified
      alter

  »   Integrated SCSI host adapter          SCSI            Closed
      terminated

      Integrated SCSI host adapter          SCSI             Open
      not terminated

  »   On board video enabled               SW1/1              On

      On board video disabled              SW1/1              Off

  »   Password enabled                     SW1/2              On

      Password disabled                    SW1/2              Off

  »   I/O controller address select        SW1/3              On
      26Eh - 26Fh

      I/O controller address select        SW1/3              Off
      398h - 399h

  »   Flash BIOS update at boot            SW1/4              On

      flash BIOS not updated at boot       SW1/4              Off

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       4MB        (2) 512K x 36         None

       8MB         (2) 1M x 36          None

       8MB        (2) 512K x 36    (2) 512K x 36

      12MB         (2) 1M x 36     (2) 512K x 36

      16MB         (2) 2M x 36          None

      16MB         (2) 1M x 36      (2) 1M x 36

      20MB         (2) 2M x 36     (2) 512K x 36

      24MB         (2) 2M x 36      (2) 1M x 36

      32MB         (2) 4M x 36          None

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

      36MB         (2) 4M x 36     (2) 512K x 36

      40MB         (2) 4M x 36      (2) 1M x 36

      48MB         (2) 4M x 36      (2) 2M x 36

      64MB         (2) 8M x 36          None

      64MB         (2) 4M x 36      (2) 4M x 36

      68MB         (2) 8M x 36     (2) 512K x 36

      72MB         (2) 8M x 36      (2) 1M x 36

      80MB         (2) 8M x 36      (2) 2M x 36

      96MB         (2) 8M x 36      (2) 4M x 36

      128MB        (2) 8M x 36      (2) 8M x 36

  Note: Board also accepts x 32 SIMMs.

                CACHE CONFIGURATION

           Size                      SL1

          256KB            256KB module installed

                  VIDEO MEMORY CONFIGURATION

        Size                Bank 0               Bank 1

        512KB               512KB                 None

         1MB                512KB             (4) 256K x 4

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

      CPU SPEED SELECTION

   Speed      JP1        JP3

   25MHz     Closed     Open

   33MHz      Open     Closed

  50iMHz     Closed     Open

  66iMHz      Open     Closed

  75iMHz     Closed     Open

  100iMHz     Open     Closed