Hot Plug Devices
In order to manage power within a computer system, three major categories require cooperative design.
System and bus hardware
Devices
Operating system and device driver software
Windows 2000 and Windows 98 support the WDM driver model, which incorporates sophisticated power management for bus and device hardware. Since the remainder of this chapter discusses the software support for power management, it is appropriate to first review the hardware requirements for the feature.
Bus Considerations
First and foremost, before a device can be powered down, the bus into which it plugs must electrically provide for such a state. For example, many bus drivers require power to guarantee an on-bus or off-bus state. Without power to the electrical ...
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