Method for maintaining bus ownership while bus mastering

Details Method for maintaining bus ownership while bus mastering Method for maintaining bus ownership while bus mastering

1997-09-18

2000-02-29

Follansbee, John A.

Electrical computers and digital data processing systems: input/

Intrasystem connection

Protocol

710108, 710129, G06F 1342, G06F 1314

Patent

active

060322101

ABSTRACT:
A method for transferring data is performed by a first input/output device in order to perform a data transaction with a host device. The first input/output device receives a first data transaction request from the host device. The first input/output device stops the first data transaction. The first input/output device then requests a data second transaction with a second input/output device and asserts a request signal. The first input output device continuously asserts the request signal even when receiving a stop signal from the second input/output device. The first input/output device retries the second data transaction with the second input/output while continuously asserting the request signal. Upon completing the second data transaction with the second input/output device, the first input/output device releases the request signal. The first input/output device then completes the data transfer with the host device.

REFERENCES:
patent: 5392407 (1995-02-01), Heil et al.
PCI Local Bus, Specification, Revision 2.1, pp. 35-61, Jun. 11, 1995.

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