Dell Latitude C540 - Manual (Page 86)

Identification tests of the microprocessor, the video controller, the keyboard controller, and other key
components
BIOS configuration information temporarily saved in RAM
Do not be concerned if the Device Groups area does not list the names of all the components or devices
you know are part of your computer. For example, you may not see a printer listed, although you know one
is attached to your computer. Instead, the printer is listed as a parallel port. The computer recognizes the
parallel port as LPT1, which is an address that tells the computer where to send outgoing information and
where to look for incoming information. Because your printer is a parallel communications device, the
computer recognizes the printer by its LPT1 address and identifies it as a parallel port. You can test your
printer connection in the Parallel Ports tests.