The Simply Interactive PC (SIPC) is a Microsoft initiative to create a computer that never needs to be serviced by the user and is as simple to use as any household appliance. This new computer is instantly available to the user because it uses power management to keep the machine in a low power state when it is not being used rather than turning all the way off (thus avoiding lengthy boot times). You will sometimes see this in appliances, such as televisions that have an Instant-On feature. They keep a low power connection to the picture tube so the picture will display almost instantly.
Windows 98 directs power management through the OnNow system. Older methods of power management did not manage power for the entire system, including all system devices and peripherals. To make this possible, the operating system itself must direct power to the computer.
With older computers, the BIOS controlled the power-state of system devices. However, OnNow makes it possible for the operating system to coordinate power management activities at all levels and define the power-state transitions for the system.
Computer power management means there is control over how the computer consumes energy and integrates its components. For example, a running application, or mouse, keyboard, or joystick activity prompts the power management system that the computer is in use. The power management system then allows the computer full power; otherwise; the power management system drops the computer to a sleep state. Another example is a fax modem, which does not need to use full power all the time. The fax modem can operate in a "standby" state, consuming less energy until it has to receive an incoming fax, at which time it is given full power. This section describes how Windows 98 supports power management.
