64 Rocket Model 204 Terminal User’s Guide
Teletypes (IODEV = 29)
If too much output is being received, press the PA1 key at any time. It cancels
all output and aborts the currently running request.
Teletypes (IODEV = 29)
This section summarizes the information needed to use Teletypes and
compatible terminals operating under TSO.
Output parameters
As soon as the Model 204 connection is made, certain output conventions are
established for Teletypes and compatible terminals. The TSO interface sets the
following parameters to the default values shown in Table 5-7.
Pausing and canceling output
At the end of each page of output, the TSO interface pauses to allow the user
to interrupt Model 204 or to cancel the current request if too much output is
being received. The TSO interface indicates that it is in pause mode by ringing
the teletype bell twice.
Valid user responses are:
• Press the attention key. The current request or operation is canceled and
Model 204 is ready to accept any terminal input from the user.
• Enter a carriage return or any other character. The interface goes on to the
next page.
• Specify a backpage to be displayed, as described in “Backpaging” on
page 59.
Because the pause and cancel capability is activated at the end of a page, be
sure not to set the OUTLPP (number of lines per page) parameter to zero,
unless you want suppressed pausing and production of a header on the new
page. If OUTLPP = 0, there is no logical end-of-page, and the interface never
executes the pause.
If you find that you are receiving too much output, you can press the attention
(BREAK) key at any time. This is equivalent to entering C or K. It cancels all
output and aborts the currently running request. BREAK can be used to cancel
Table 5-7. TSO interface output parameters for teletypes
Parameter Meaning Default
OUTMRL Maximum output line length for terminal 80
OUTCCC Output continuation column 80
OUTLPP Number of lines per page, including headers and
trailers
60
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