User`s guide

and peripheral component interconnect (PCI) and Industry Standard

Architecture (ISA) devices.

• Chapter 4, System Address Mapping, describes the mapping of the 40-bit

processor address space into memory and I/O space addresses.

• Chapter 5, Power and Environmental Requirements, describes the board

power and environmental requirements, and identiﬁes major board

components.

• Appendix A, I/O Address Maps, lists the physical EB164 PCI address

spaces and regions, including control, I/O interface, and address operating

registers and PCI/ISA device registers.

• Appendix B, SROM Initialization, describes the general serial read-

only memory (SROM), Bcache, and memory initialization steps and

associated parameters. Also included are the ﬁrmware interface, timing

considerations, and SROM header information.

• Appendix C, Technical Support and Ordering Information, describes how to

obtain Digital Semiconductor information and technical support, and how

to order Digital Semiconductor products and associated literature.

• Glossary lists and deﬁnes terms associated with the EB164.

Document Conventions

This section provides the conventions used in this document.

Bit and Field Abbreviations

The following list describes the 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.

Bit Notation

Multiple bit ﬁelds are shown as extents (see Ranges and Extents in this

section).

Caution

Cautions indicate potential damage to equipment or data.