National Instruments NI-488.2 - Manual (Page 124)

Glossary
NI-488.2 User Manual G-4 ni.com
hex Hexadecimal—A number represented in base 16. For example,
decimal 16 is hex 10.
high-level function See device-level function .
HS488 A high-speed data transfer protocol for IEEE 488. This protocol increases
performance for GPIB reads and writes up to 8 Mbytes/s, depending on
your system.
Hz Hertz.
I
I/O Input/output—In this manual, it is the transmission of commands or
messages between the system via the GPIB board and other devices
on the GPIB.
I/O address The address of the GPIB board from the point of view of the CPU, as
opposed to the GPIB address of the GPIB board. Also called port address
or board address.
ibcnt After each NI-488.2 I/O call, this global variable contains the actual
number of bytes transmitted. On systems with a 16-bit integer, such as
MS-DOS,
ibcnt is a 16-bit integer, and ibcntl is a 32-bit integer. For
cross-platform compatibility, use ibcntl , unless using the newer NI4882
API. For accessing the newer NI4882 API, use the global function, Ibcnt ,
instead.
Ibcnt After each NI-488.2 call, this global function contains the actual number of
bytes transmitted. The
Ibcnt function returns a 32-bit integer. For
accessing the newer NI4882 API, this function is recommended instead of
the global variables,
ibcnt and ibcntl .
ibcntl After each NI-488.2 I/O call, this global variable contains the actual
number of bytes transmitted. On systems with a 16-bit integer, such as
MS-DOS,
ibcnt is a 16-bit integer, and ibcntl is a 32-bit integer. For
cross-platform compatibility, use ibcntl , unless using the newer NI4882
API. For accessing the newer NI4882 API, use the global function, Ibcnt ,
instead.
iberr A global variable that contains the specific error code associated with a
function call that failed. For accessing the newer NI4882 API, use the
global function,
Iberr , instead.