The Previous Chapter
This chapter described the mechanism that permits FSB agents to limit the number of transactions that can be injected into the FSB. It included:
Assert BNR# When One Entry Remains.
BNR# Can Be Used by a Debug Tool.
Who Monitors BNR#.
BNR# is a Shared Signal.
The Stalled/Throttled/Free Indicator.
Initial Entry to the Stalled State.
The Throttled State.
The Free State.
As an Agent Approaches Full, It Signals BNR# to Stall Everyone.
BNR# Behavior at Powerup.
BNR# Behavior During Runtime.
This Chapter
This chapters provides a detailed description of the Request Phase of a FSB transaction. It includes:
Introduction to the Request Phase.
The Source Synchronous Strobes.
The Request Phase Parity.
Request Phase Parity Checking.
ChipSet Request Phase Parity Checking and Reporting.
Processor Request Phase Parity Checking and Reporting.
The Request Phase Signal Group is Multiplexed.
Introduction to the Transaction Types.
The Contents of Request Packet A.
32-bit vs. 36-bit Addresses.
The Contents of Request Packet B.
The Next Chapter
This chapter provides a detailed description of the Snoop Phase of a FSB transaction. It includes:
Agents Involved in the Snoop Phase.
The Snoop Phase Has Two Purposes.
The Snoop Result Signals are Shared, DEFER# Isn't.
The Snoop Phase Duration Is Variable.
There Is No Snoop Stall Duration Limit.
Memory Transaction Snooping.
The Snoop's Effects on Processor Caches.
Self-Snooping.
Non-Memory Transactions Have a Snoop Phase.
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