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National Instruments Corporation
G-1
VXI/VMEpc 600 Series for Windows 95/NT
Glossary
Prefix
Meanings
Value
p-
pico
10
– 12
n-
nano-
10
– 9
µ-
micro-
10
– 6
m-
milli-
10
– 3
k-
kilo-
10
3
M-
mega-
10
6
G-
giga-
10
9
t-
tera-
10
12
A
A16 space
VXIbus address space equivalent to the VME 64 KB short address space.
In VXI, the upper 16 KB of A16 space is allocated for use by VXI devices
configuration registers. This 16 KB region is referred to as VXI
configuration space.
A24 space
VXIbus address space equivalent to the VME 16 MB standard address
space
A32 space
VXIbus address space equivalent to the VME 4 GB extended address space
address
Character code that identifies a specific location (or series of locations) in
memory. In VISA, it identifies a resource.
address space
A set of 2
n
memory locations differentiated from other such sets in
VXI/VMEbus systems by six addressing lines known as address modifiers.
n is the number of address lines required to uniquely specify a byte location
in a given space. Valid numbers for n are 16, 24, and 32. In VME/VXI,
because there are six address modifiers, there are 64 possible address
spaces.
address window
A portion of address space that can be accessed from the application
program
