Abstract: A circuit for isolating a device from a bus includes a local clock, a clock multiplexer, and control logic. The clock multiplexer has a first input terminal coupled to the local clock, a second input terminal coupled to the first clock line of the bus, a control input terminal, and an output terminal. The output terminal is adapted to provide an output clock signal to the device. The control logic is coupled to the control input of the clock multiplexer and adapted to detect a bus isolation event. The control logic is further adapted to generate a bus isolation signal in response to the bus isolation event and provide the bus isolation signal to the control input of the clock multiplexer. A method is provided for isolating a device from a bus. The method includes detecting a bus isolation event. An isolation signal is generated in response to the bus isolation event. One of a local clock signal and a first clock signal provided by the bus is selected based on the isolation signal.

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.

Abstract: A computer system includes a bus, remote console logic, a remote server management device, and an interrupt routing switch. The bus has a first interrupt line. The remote console logic has a second interrupt line and is coupled to the bus. The remote console logic is adapted to monitor video transactions present on the bus. The video transactions include video data. The remote console logic is further adapted to store the video data and provide an interrupt signal on the second interrupt line if the amount of stored video data reaches a predetermined threshold. The remote server management device is coupled to the bus and the first interrupt line. The interrupt routing switch is coupled to the first interrupt line and the second interrupt line and adapted to couple the second interrupt line to the first interrupt line. A method for capturing video transactions includes coupling a first interrupt line of a buffer to a shared interrupt line of a bus. Video transactions occurring on the bus are snooped.