June 2009
Intermediate to advanced
1264 pages
55h
English
Content preview from Windows Internals, Fifth EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The Power Manager
Just as Windows Plug and Play features require support from a system’s hardware, its power-management capabilities require hardware that complies with the Advanced Configuration and Power Interface (ACPI) specification (available at www.teleport.com/~acpi/spec.htm).
The ACPI standard defines various power levels for a system and for devices. The six system power states are described in Table 7-8. They are referred to as S0 (fully on or working) through S5 (fully off). Each state has the following characteristics:
Power consumption The amount of power the computer consumes
Software resumption The software state from which the computer resumes when moving to a “more on” state
Hardware latency The length of time it takes to return the ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.