The Transaction Phases
The P6 Transaction Phases
Each transaction initiated on the P6 FSB proceeded through the following phases from its inception to its completion (note that some transaction types do not require a data transfer and therefore do not include the Data Phase):
Arbitration Phase.
Request Phase.
Error Phase.
Snoop Phase.
Response Phase.
Data Phase.
The Pentium® 4/M Transaction Phases
The phases of a FSB transaction are identical to those on the P6 FSB with one exception: the Error Phase was eliminated.
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