Plug and Play BIOS Specification

Plug and Play BIOS Specification 1.0A Page 35
When the system software is notified of an event by either mechanism, it can then call the BIOS runtime
function to get the event which will return a message specifying the type of event. These events are
specific to the system and do not represent events that can occur on the various expansion busses, such as
PCMCIA insertion and removal events. The following table describes the types of events that are reported
through this BIOS interface: