Cable Lock Provision; Chassis Security - Compaq Deskpro Workstation AP230 Technical Reference Manual

Chapter 4 System Support
4.7.1.3

Cable Lock Provision

These systems include a chassis cutout (on the rear panel) for the attachment of a cable lock
mechanism.
4.7.1.4 I/O Interface Security
The serial, parallel, USB, and diskette interfaces may be disabled individually through the Setup
utility to guard against unauthorized access to a system. In addition, the ability to write to or boot
from a removable media drive (such as the diskette drive) may be enabled through the Setup
utility. The disabling of the serial, parallel, and diskette interfaces are a function of the
LPC47B357 I/O controller. The USB ports are controlled through the 82801 ICH2.
4.7.1.5

Chassis Security

The Small Form Factor and Slim Desktop systems feature Smart Cover (hood) Sensor and Smart
Cover (hood) Lock mechanisms to inhibit unauthorized tampering of the system unit.
Smart Cover Sensor
The Small Form Factor and Slim Desktop systems include a plunger switch that, when the cover
(hood) is removed, closes and grounds an input of the 82801 ICH2. The battery-backed logic will
record this "intrusion" event by setting a specific bit. This bit will remain set (even if the cover is
replaced) until the system is powered up and the user completes the boot sequence successfully, at
which time the bit will be cleared. Through Setup, the user can set this function to be used by
Alert-On-LAN and or one of three levels of support for a "cover removed" condition:
Level 0 - Cover removal indication is essentially disabled at this level. During POST, status bit is
cleared and no other action is taken by BIOS.
Level 1 - During POST the message "The computer's cover has been removed since the last
system start up" is displayed and time stamp in CMOS is updated.
Level 2 - During POST the "The computer's cover has been removed since the last system start
up" message is displayed, time stamp in CMOS is updated, and the user is prompted for the
administrator password.
Smart Cover Lock
The Small Form Factor and Slim Desktop systems include a solenoid-operated locking bar that,
when activated, prevents the cover (hood) from being removed. The GPIO ports 44 and 45 of the
LPC47B357 I/O controller provide the lock and unlock signals to the solenoid. A locked hood
may be bypassed by removing special screws that hold the locking mechanism in place. The
special screws are removed with the Compaq Smart Cover Lock Failsafe Key (Compaq p/n
xxxxxx).
4-34 Compaq Deskpro Personal Computers
Third Edition – April 2001