Broadcast Messages; The Attention Interruption - IBM System 360 User Manual

BROADCAST MESSAGES
Broadcast messages are messages of general interest to users of the
system. Both the system operator and any user of the system can send
broadcast messages. The system operator can send messages to all users
of the system or to individual users. For example, he may send the
following message to all users:
DO NOT USE TERMINALS
#
4 , 5 AND 6 ON 6/30. THEY ARE RESERVED FOR
DEPARTMENT
791'.
You, or any other user, can send messages to other users or to the
system operator. For example, you may send, or receive. the following
message:
ACCOUNT NO.
4672
WILL BE CHANGED TO
4675
STARTING
8/25
A message sent by another user will show his user identification so
you will know who sent you the message,.
To find out how to send or receive broadcast
m~ssages,
refer to the
section "Starting and Ending a Terminal Session".
The Attention Interruption
The attentiQn interruption allows you to interrupt processing of your
job so that you can enter a new
con~and
or subcommand. The ability to
interrupt processing prevents you from being "locked out" by the system
while a long-running program executes or while voluminous output is
displayed at your terminal. You can use the attention interruption for
access to the system.
When you enter an attention interruption, the system suspends
processing and sends you a mode message,. If the system was processing a
command, you receive the following mode message:
READY
you can then enter a new command. If the system was processing a
subcommand, the mode message will be the name of the command to which
the subcommand belongs:
ACCOUNT
EDIT
OPERATOR
OUTPUT
TEST
If you do not want to enter another subcommand, you should enter
another attention interruption which will cause the READY message to
appear.
See the section "Displaying Session Time Used" for other uses of
attention interruption.
There are two ways to cause an attention interruption:
1. Press the attention (or substitute attention) key:
• ATTN key on an IBM
2741
Communications terminal.
18
TSO Terminal User' s Guide (Release
21)