Compaq W4000 manual Cable Lock Provision, 1.4 I/O Interface Security, Chassis Security

Technical Reference Guide

4.7.1.3Cable Lock Provision

These systems include a chassis cutout (on the rear panel) for the attachment of a cable lock mechanism.

4.7.1.4I/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 LPC47B367 I/O controller. The USB ports are controlled through the 82801 ICH2.

4.7.1.5Chassis Security

The Small Form Factor and 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 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 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 LPC47B367 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 Evo and Workstation Personal Computers4-27

Featuring the Intel Pentium 4 Processor

Second Edition - January 2003