DEC Digital Alpha VME 4/224 User Manual page 23

Conventions
This section defines terminology, abbreviations, and other conventions used in
this manual.
Abbreviations
• Register access
The following list describes the register bit and field abbreviations:
Bit/Field Abbreviation
MBZ (must be zero)
RO (read only)
RW (read/write)
WO (write only)
• Binary multiples
The abbreviations K, M, and G (kilo, mega, and giga) represent binary
multiples and have the following values:
= 2
K
= 2
M
= 2
G
For example:
2 KB = 2 kilobytes
4 MB = 4 megabytes
8 GB = 8 gigabytes
Addresses
Unless otherwise noted, addresses and offsets are hexadecimal values.
Bit Notation
Multiple-bit fields can include contiguous and noncontiguous bits contained in
angle brackets ( <> ). Multiple contiguous bits are indicated by a pair of numbers
separated by a colon ( : ). For example, <9:7,5,2:0> specifies bits 9, 8, 7, 5, 2, 1,
and 0. Similarly, single bits are frequently indicated with angle brackets. For
example, <27> specifies bit 27.
Description
Bits and fields specified as MBZ must be zero.
Bits and fields specified as RO can be read but not
written.
Bits and fields specified as RW can be read and
written.
Bits and fields specified as WO can be written but not
read.
10
(1024)
20
(1,048,576)
30
(1,073,741,824)
= 2
= 4
= 8
3
2 10
bytes
3
2
20
bytes
3
2
30
bytes
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