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1 About This Manual
This manual describes the AlphaPC 164 motherboard, a module for computing
systems based on the Digital Semiconductor 21164 Alpha microprocessor and the
companion Digital Semiconductor 21172 core logic chipset. It describes the features
of the motherboard and how to set the configuration jumpers. The manual is intended
for users of the AlphaPC 164 motherboard to assist them in installing the
motherboard and populating it with memory modules and peripheral cards.
1.1 Document Conventions
The following conventions are used in this document.
Caution: Cautions indicate potential damage to equipment, software, or data.
Note: Notes provide additional information about a topic.
Numbering: All numbers are decimal or hexadecimal unless otherwise indicated. In
case of ambiguity, a subscript indicates the radix of nondecimal numbers. For
example, 19 is a decimal number, but 1916 and 19A are hexadecimal numbers.
Extents: Extents are specified by a single number or a pair of numbers in angle
brackets (< >) separated by a colon (:), and are inclusive. For example, bits <7:3>
specify an extent including bits 7, 6, 5, 4, and 3. Multiple bit fields are shown as
extents.
Register Figures: Register figures have bit and field position numbering starting at
the right (low-order) and increasing to the left (high-order).
Signal Names: All signal names are printed in boldface type. Signals whose names
originate in an industry-standard specification, such as PCI or IDE, are printed in the
case used in the specification (usually uppercase). Active low signals have either a
pound sign "#" appended, or a "not" overscore bar (for example: SDONE,
DEVSEL#, and RESET).
Italic Type: Italic type emphasizes important information and indicates complete
titles of documents.
About This Manual
1
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