Electrical computers and digital data processing systems: input/ – Intrasystem connection – Bus access regulation
Patent
1998-06-25
2000-10-03
Myers, Paul R.
Electrical computers and digital data processing systems: input/
Intrasystem connection
Bus access regulation
710131, G06F 1300
Patent
active
061286826
ABSTRACT:
A circuit for isolating a device from a bus includes a switch and control logic. The switch has a control input and is coupled between the bus and the device. The bus includes a first plurality of bus lines, including a first grant line. The device includes a second plurality of bus lines, including a second grant line. The control logic is coupled to the control input of the switch and adapted to detect a bus isolation event, and generate a bus isolation signal in response to the bus isolation event. The control logic provides the bus isolation signal to the control input of the switch, and drives the voltage on the second grant line to a predetermined voltage in response to the bus isolation signal. The predetermined voltage is independent of the voltage on the first grant line. A method for isolating a device from a bus includes detecting a bus isolation event. An isolation signal is generated in response to the bus isolation event. The device is isolated from the bus in response to the isolation signal. A grant line on the device is driven to a predetermined voltage in response to the isolation signal.
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Compaq Computer Corporation Technology Brief, "Remote Server Management with Integrated Remote Console", Oct. 21, 1996.
Butler John
Humpherys Brian
Compaq Computer Corporation
Myers Paul R.
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