Reference Guide

ZCOM Subsystem
ZCOM Concepts
Chapter 118
Figure 1-3 on page 18 shows a sample set of program and terminal ZLUs,
and their interaction with each other and a Mux card:
Figure 1-3 Definition and Features of ZLUs
To communicate to another program or to a terminal, a program uses
ZCOM library calls to write to a program or terminal ZLU. Each program
ZLU points to a queue that contains all messages, including timeout and
status messages, that were delivered to the program ZLU. These pointers
Application
Program A
Application
Program B
Terminal 1
Terminal 2
Terminal 3
Mux card
Program
ZLU=502
Program
ZLU=500
Te r min a l
ZLU=101
Te r min a l
ZLU=231
Te r min a l
ZLU=57