Electrical computers and digital processing systems: support – Computer power control
Patent
1998-01-20
2000-10-17
Sheikh, Ayaz R.
Electrical computers and digital processing systems: support
Computer power control
709200, E06F 126
Patent
active
061346659
ABSTRACT:
An apparatus for use in a computer has a network interface subsystem having power applied thereto when power is removed from other components of the computer. A receiver in the network interface subsystem receives a packet directed to the computer from the network, and in response to receipt of a selected packet, restores power to the other components of the computer. Upon restoration of power to the other components of the computer, a signalling device reports status of at least one of the other components of the computer to the network interface subsystem. A transmitter in the network interface subsystem sends, in response to the signalling device, a status packet onto the network giving a status of the computer in the event that a component is not functional, following restoration of power to the other components of the computer. The computer has a processor which executes a self test upon restoration of power to the processor, and a self test signalling device to signal to the network interface subsystem the results of the self test, to initiate transmission of a status packet by the network interface onto the network in the event that the computer fails the self test. The signalling device may be a management bus, and the management bus may operate under the I2C protocol. The receiver uses imperfect filtering to identify a wake up packet, and also may use a mask in performing imperfect filtering.
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Ben-Michael Simoni
Klein Philippe
Menachem Avraham
Shvimmer Sarit
Digital Equipment Corporation
Sheikh Ayaz R.
Wiley David
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