Dell Latitude CPx J - Manual (Page 141)

COM1 (the default) — Maps the serial port to COM1
COM2 — Maps the serial port to COM2
COM3 — Maps the serial port to COM3
COM4 — Maps the serial port to COM4
Disabled — Disables the serial port and its assigned COM address, freeing that interrupt for another
device to use
For a change in the Serial Port option to take effect, you must reboot your computer.
Service Tag
Service Tag displays the computer's service code, which was programmed into NVRAM by Dell during the
manufacturing process. Be prepared to supply this identification during technical assistance or service calls.
The service tag is also accessed by certain Dell support software, including diagnostics. No user-selectable
settings are available for this option.
NOTE: Convert the service tag number into an express service code when prompted to do so the first
time you turn on the computer (or use the program in the Dell Accessories folder). Keep the code
handy in case you call Dell for technical assistance. The code helps Dell's automated support
telephone system direct your call more efficiently.
Smart CPU Mode
Smart CPU Mode allows the computer to slow down the microprocessor automatically if it is not being
actively used. This feature is a key component to the thermal control of the system.
NOTE: With systems running under ACPI, power management settings are controlled from the Power
Management Properties window in the Control Panel. Certain features require configuration
through the Power Management Properties window and others may not function with ACPI.
Settings for this option are:
Enabled (the default) — Saves power, helps to lower system temperatures, and extends battery life by
allowing the computer to slow down the microprocessor when it is inactive
Disabled — Keeps the microprocessor running at its normal operating speed regardless of
microprocessor inactivity (can reduce battery life)
NOTES: In rare situations, some communications software may not work properly when Smart CPU
Mode is enabled. Dell recommends that you set Smart CPU Mode to Disabled if your computer is
experiencing performance degradation.
Interactive application programs should function well when Smart CPU Mode is set to Enabled.
(Examples of interactive programs include spreadsheet, text editor, graphics design, entertainment,