NIM Primitives
4-1
TIWAY 1 Ti505 NIM User Manual
Chapter 4
NIM Primitives
4.1
OVERVIEW
Primitives are high-level commands that allow a user to access like data types in all dif-
ferent Secondaries in the same manner. For example, a host computer can access image
register memory in several different models of TI P/Cs with the same command. The
Primitives remove as many differences as possible between the P/Cs, so that applications
programs at the Primary (host) level may treat all TIWAY I Secondaries in the same
manner.
Primitives provide several benefits.
Primitives reduce the amount of host computer software needed to acquire data
from the Secondaries.
Primitives provide a standard communication protocol that allow you to commu-
nicate with different types of Secondaries and attached devices without custom
software routines.
Primitives allow more efficient use of the available network bandwidth by in-
creasing the amount of data that is available in a single message. For example,
with a single programming peripheral Task Code (P/C communication lan-
guage), you might be able to access no more than 15 words of data. With some
Primitives, up to 134 words can be accessed.
Primitives reduce total system loading. This is possible because the NIMs can
memorize data locations that are repeatedly accessed. Block and Record Gather
Primitives make it possible to access a block of data previously defined and
stored in the NIM.
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