
COMPAQ COMPUTER CORPORATION

DESKPRO XE 486

Processor       80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 25/33/50(internal)/66(internal)MHz
Chip Set        Compaq
Max. Onboard    32MB
DRAM
Cache           64/256KB (on external cache card)
BIOS            AMI
Dimensions      330mm x 218mm
I/O Options     External cache card, floppy drive interface, IDE
                interface, parallel port, PS/2 mouse port, serial port,
                VGA port
NPU Options     None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  PS/2 mouse port             CN1      Floppy drive interface      CN7

  Parallel port               CN2      Speaker                     J1

  Serial port                 CN3      Power LED & keylock         J2

  VGA port                    CN4      External battery            J3

  Video memory upgrade        CN5      Riser card                  SL1

  IDE interface               CN6      External cache card         SL2

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch        Position

     Battery type select internal           J4              pins 1 & 2
                                                              closed

      Battery type select external           J4              pins 2 & 3
                                                              closed

     On board video enabled               SW502/1              Off

      On board video disabled              SW502/1              On

     Setup write protect disabled         SW502/2              Off

      Setup write protect enabled          SW502/2              On

     Floppy drive select                  SW502/3              Off
      read/write

     Floppy drive select read             SW502/3              On
      only

     Factory configured - do not          SW502/4              Off
      alter

     CMOS memory normal operation         SW502/5              Off

      CMOS memory clear                    SW502/5              On

     Flash BIOS write protect             SW502/6              Off
      enabled

      Flash BIOS write protect             SW502/6              On
      disabled

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (1) 256K x        NONE           NONE           NONE
                    36

     2MB        (1) 256K x     (1) 256K x        NONE           NONE
                    36             36

     2MB        (1) 512K x        NONE           NONE           NONE
                    36

     3MB        (1) 256K x     (1) 256K x     (1) 256K x        NONE
                    36             36             36

     3MB        (1) 256K x     (1) 512K x        NONE           NONE
                    36             36

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

     4MB        (1) 512K x     (1) 512K x        NONE           NONE
                    36             36

     4MB       (1) 1M x 36        NONE           NONE           NONE

     5MB        (1) 256K x     (1) 512K x     (1) 512K x        NONE
                    36             36             36

     5MB        (1) 256K x    (1) 1M x 36        NONE           NONE
                    36

     6MB        (1) 512K x     (1) 512K x     (1) 512K x        NONE
                    36             36             36

     6MB        (1) 512K x    (1) 1M x 36        NONE           NONE
                    36

     7MB        (1) 256K x     (1) 512K x     (1) 512K x    (1) 512K x 36
                    36             36             36

     8MB        (1) 512K x     (1) 512K x     (1) 512K x    (1) 512K x 36
                    36             36             36

     8MB       (1) 1M x 36    (1) 1M x 36        NONE           NONE

     8MB       (1) 2M x 36        NONE           NONE           NONE

     9MB        (1) 256K x    (1) 1M x 36    (1) 1M x 36        NONE
                    36

     9MB        (1) 256K x    (1) 2M x 36        NONE           NONE
                    36

     10MB       (1) 512K x    (1) 1M x 36    (1) 1M x 36        NONE
                    36

     10MB       (1) 512K x    (1) 2M x 36        NONE           NONE
                    36

     12MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36        NONE

     12MB      (1) 1M x 36    (1) 2M x 36        NONE           NONE

     13MB       (1) 256K x    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

     14MB       (1) 512K x    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

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

     16MB      (1) 2M x 36    (1) 2M x 36        NONE           NONE

     17MB       (1) 256K x    (1) 2M x 36    (1) 2M x 36        NONE
                    36

     18MB       (1) 512K x    (1) 2M x 36    (1) 2M x 36        NONE
                    36

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1        Bank 2         Bank 3

     20MB       (1) 1M x 36     (1) 2M x 36   (1) 2M x 36       NONE

     24MB       (1) 2M x 36     (1) 2M x 36   (1) 2M x 36       NONE

     25MB        (1) 256K x     (1) 2M x 36   (1) 2M x 36    (1) 2M x 36
                     36

     26MB        (1) 512K x     (1) 2M x 36   (1) 2M x 36    (1) 2M x 36
                     36

     28MB       (1) 1M x 36     (1) 2M x 36   (1) 2M x 36    (1) 2M x 36

     32MB       (1) 2M x 36     (1) 2M x 36   (1) 2M x 36    (1) 2M x 36

                          CPU TYPE CONFIGURATION

       Type          SW500/1       SW500/2       SW500/3        SW500/4

    80486SX-33         Off           Off           Off            Off

    80487SX-25         Off            On            On            On

  ODP486SX-25/50       Off            On            On            On

  ODP486SX-33/66       Off            On            On            Off

    80486DX-33          On           Off            On            Off

   80486DX2-50          On           Off            On            On

   80486DX2-66          On           Off            On            Off

