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• Chapter 1, Introduction, is an overview of the AlphaPC 164SX motherboard,
including its components, features, and uses.
• Chapter 2, System Configuration and Connectors, describes the user-environ-
ment configuration, board connectors and functions, and switch functions. It also
identifies switch settings and connector locations.
• Chapter 3, Power and Environmental Requirements, describes the AlphaPC
164SX power and environmental requirements and provides board dimensions.
• Chapter 4, Functional Description, provides a functional description of the
AlphaPC 164SX motherboard, including the 21174 core logic chip, L2 backup
cache (Bcache) and memory subsystems, system interrupts, clock and power
subsystems, and peripheral component interconnect (PCI) and Industry Standard
Architecture (ISA) devices.
• Chapter 5, Upgrading the AlphaPC 164SX, describes how to upgrade the
AlphaPC 164SX motherboard’s SDRAM memory and microprocessor speed.
• Appendix A, Support, Products, and Documentation, lists sources for compo-
nents and accessories not included with the AlphaPC 164SX motherboard and
describes how to obtain information and technical support, and how to order
products and associated literature.
Conventions
This section defines product-specific terminology, abbreviations, and other conven-
tions used throughout this manual.
Abbreviations
•
Register Access
The following list describes the register bit and field abbreviations:
Bit/Field Abbreviation Description
RO (read only) Bits and fields specified as RO can be read but not written.
RW (read/write) Bits and fields specified as RW can be read and written.
WO (write only) Bits and fields specified as WO can be written but not read.