CMS Terminal Interface 75
Teletype terminals (IODEV = 39, ALTIODEV = 45)
PUN FILE 4545 FROM MAINT COPY 001 NOHOLD
The MORE... prompt appears in the status area of the screen. At this point, if
user B presses Enter, the status area prompt switches to HOLDING; if user B
presses Enter again, the prompt switches to MORE... once again. The user
must press the CLEAR key to clear the screen. If the user does not press the
CLEAR key, the terminal waits 50 seconds, sounds the alarm, waits 10 more
seconds, and then clears the screen and continues with Model 204 output.
At installation time, the system manager can customize CMS files to prevent
messages from other terminals from interrupting the Model 204 session in the
manner described here. For more information on preventing message
interruptions, refer to the Model 204 System Manager’s Guide.
Teletype terminals (IODEV = 39, ALTIODEV = 45)
This section summarizes the information needed to use Teletypes and
Teletype-compatible devices operating under CMS in line-at-a-time mode. For
line-at-a-time usage in a multiuser environment, the IODEV parameter must be
set to 39. For line-at-a-time usage in a single-user environment, the ALTIODEV
parameter must be set to 45.
Attention key
The BREAK key serves as the attention key on Teletype-compatible terminals.
The ATTN key serves as the attention key on IBM 2741 and compatible
terminals.
Pausing and canceling output
In line-at-a-time mode, Model 204 pauses at the end of each page of output to
allow the user to cancel the current request if too much output is being
received.
Valid user responses are:
• Press Return (or any other character) to go on to the next page.
• Press the attention key. Unless an ON ATTENTION statement is in effect
(see“Attention interrupt feature” on page 11), the current output and
request are canceled.
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