COMPAQ COMPUTER CORPORATION

DESKPRO XL 450/466/560/566/590

Processor         80486DX2/Pentium (depends on CPU card installed)
Processor Speed   50(internal)/60/66(internal)/66MHz
Chip Set          Compaq
Max. Onboard DRAM 128MB
Cache             None
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       External CPU card, 32-bit PCI bus slots (2), floppy drive
                  interface, game port, IDE interface, parallel port, SCSI
                  port, audio signal interface, PS/2 mouse port, serial
                  ports (2), CD-ROM interface, audio ports (2),
                  speaker/microphone port
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                     Location     Purpose             Location

  Audio port 1                   AD1       Game port              CN8

  Audio port 2                   AD2       Chassis fan            E1
                                           power

  Speaker/microphone             CN1       External battery       E3
  connector

  PS/2 mouse port                CN2       Audio signal           E4
                                           interface

  Keyboard connector             CN3       IDE interface          E5

  Serial port 1                  CN4       Floppy drive           E6
                                           interface

  Serial port 2                  CN5       Audio interface        E7

  Parallel port                  CN6       32-bit PCI bus      PC1 & PC2
                                           slots

  SCSI port                      CN7       External CPU           SL1
                                           slot

                        USER CONFIGURABLE SETTINGS

              Function                   Jumper/Switch        Position

  »   Battery type select internal            E2             pins 2 & 3
                                                               closed

      Battery type select external            E2             pins 1 & 2
                                                               closed

  »   Flash BIOS write protect               SW1/1              Off
      enabled

      Flash BIOS write protect               SW1/1               On
      disabled

  »   EISA configuration changes             SW1/2              Off
      enabled

      EISA configuration changes             SW1/2               On
      disabled

  »   Floppy drive read/write                SW1/3              Off
      enabled

      Floppy drive read/write                SW1/3               On
      disabled

  »   EISA configuration diskette            SW1/4              Off
      boot enabled

      EISA configuration diskette            SW1/4               On
      boot disabled

  »   Password enabled                       SW1/5              Off

      Password enabled                       SW1/5               On

  »   EISA configuration normal              SW1/6              Off

      EISA configuration erasable            SW1/6               On

[Image]

                            DRAM CONFIGURATION

          Size                    Bank 0                   Bank 1

           2MB                (2) 256K x 36                 NONE

           4MB                (2) 256K x 36            (2) 256K x 36

           4MB                (2) 512K x 36                 NONE

           6MB                (2) 256K x 36            (2) 512K x 36

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

           8MB                 (2) 1M x 36                  NONE

          10MB                (2) 256K x 36             (2) 1M x 36

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

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

          18MB                (2) 256K x 36             (2) 2M x 36

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

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

          32MB                 (2) 4M x 36                  NONE

          34MB                (2) 256K x 36             (2) 4M x 36

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

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

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

          64MB                 (2) 8M x 36                  NONE

          66MB                (2) 256K x 36             (2) 8M x 36

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

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

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

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

  Note: If 80486 board is installed, Bank 0 consists of J1 & J2 and Bank
  1 consists of J3 & J4. If Pentium board is installed, Bank 0 consists
  of J1 & J3 and Bank 1 consists of J2 & J4.