There are a number of references to the Request Phase of the transaction in this chapter. After a Request Agent has arbitrated for and won ownership of the Request Phase signal group, it may then initiate a transaction by issuing a transaction request during the Request Phase of the transaction. This consists of the output of two packets of information and the assertion of ADS# (Address Strobe) during the first BCLK cycle of the transaction. For a detailed description of the Request Phase, refer to the chapter entitled “Pentium® 4 FSB Request Phase” on page 1201.
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