Transfer Types Supported
HT supports two types of addressing semantics:
legacy PC, address-based semantics
messaging semantics common to networking environments
The first part of this book discusses the address-based semantics common to compatible PC implementations. Message-passing semantics are discussed in Chapter 19, entitled "Networking Extensions Overview," on page 443.
Address-Based Semantics
The HT bus was initially implemented as a PC compatible solution that by definition uses Address-based semantics. This includes a 40-bit, or 1 Terabye (TB) address space. Transactions specify locations within this address space that are to be read from or written to. The address space is divided into blocks that are allocated for particular functions, ...
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