Retry mechanism for blocking interfaces

Details Retry mechanism for blocking interfaces Retry mechanism for blocking interfaces

2006-03-21

2006-03-21

Myers, Paul R. (Department: 2112)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Protocol

C710S311000, C710S313000, C710S315000, C710S305000

Reexamination Certificate

active

07016994

ABSTRACT:
An improved interface technology is provided that may be applied to PCI (Peripheral Component Interconnect) devices connected to a southbridge. Requests are received from at least one requestor. The request require responses to be sent back to the respective requestor. The requests are placed by the respective requestor by asserting a request signal, and the request signal is deasserted by the respective requestor when a response is sent back. A retry request may be sent to the current requestor for requesting the current requestor to deassert its request signal although a response has not yet been sent back, and to reassert the request signal later. Together with the retry request, a ready signal is sent indicating whether the request could be processed. This allows the requestor to modify its request when retrying it, if the request was not yet processed.

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