Compaq AlphaPC 264DP Technical Reference Manual page 12

Term
Quadword
Octaword
Hexword
Note
Notes emphasize particularly important information.
Numbering
All numbers are decimal or hexadecimal unless otherwise indicated. The prefix 0x
indicates a hexadecimal number. For example, 19 is decimal, but 0x19 and 0x19A
are hexadecimal (also see Addresses). Otherwise, the base is indicated by a sub-
script; for example, 100
Ranges and Extents
Ranges are specified by a pair of numbers separated by two periods (..) and are inclu-
sive. For example, a range of integers 0..4 includes the integers 0, 1, 2, 3, and 4.
Extents are specified by a pair of numbers in brackets ([]) separated by a colon (:)
and are inclusive. Bit fields are often specified as extents. For example, bits [7:3]
specifies bits 7, 6, 5, 4, and 3.
Register and Memory Figures
Register figures have bit and field position numbering starting at the right (low
order) and increasing to the left (high order).
Memory figures have addresses starting at the top and increasing toward the bottom.
xii
Words Bytes
4 8
8 16
16 32
is a binary number.
2
12 February 1999 – Subject To Change
Bits Other
64 2 Longwords
128 2 Quadwords
256 2 Octawords