Appendix. Glossary of Terms

Address Map

The 1.04 revision of the HT specification defines a 40-bit memory map. All resources which can be targeted with directed packets are mapped into this space. In addition, reserved portions of the memory map are used for special purposes, including IO accesses, broadcast messages, interrupts, configuration cycles, etc.

AGP (Accelerated Graphics Port)

A high-performance, point-to-point interface which connects a graphics adapter to the main memory controller in the Memory Controller Hub (MCH) or North Bridge (Host/PCI Bridge).

Atomic Read-Modify-Write Transaction

A hybrid read and write operation issued from one source, targeting main memory. An Atomic RMW is guaranteed to complete without intervening accesses ...

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