TSO Interface 63
IBM 3270 terminals (IODEV = 29)
• If Model 204 is waiting for input from the terminal or is actively displaying
output on the terminal, press the attention key.
Note: If Model 204 is compiling or executing a command, the user cannot
cancel the operation by pressing the attention key.
IBM 3270 terminals (IODEV = 29)
This section summarizes the information needed to use IBM 3270s (and
compatible terminals) operating under TSO in line-at-a-time mode.
PA1 key
The PA1 key can be used to cancel either a single line or multiple lines of
output. It cannot be used to terminate the TSO interface and return to TSO.
Output parameters
As soon as the Model 204 connection is made, the TSO interface sets the
following parameters to the default values shown in Table 5-6.
Pausing and canceling output
On the 3270, the TSO interface does not ordinarily pause at the bottom of the
screen to allow the user to interrupt Model 204 or to cancel the current request
if too much output is being received. The user can cause TSO to pause by
specifying a page size in the OUTLPP parameter. If OUTLPP = 23, the interface
pauses after 23 lines have been displayed and allows the final line (line 24) on
the screen to be used for a backpage request. The TSO interface indicates that
it is in pause mode by pausing and unlocking the keyboard.
Valid user responses are:
• Press the attention key. The current request or operation is canceled and
Model 204 is then ready to accept terminal input from the user.
• Press Enter. The interface goes on to the next page.
• Specify a backpage to be displayed, as described in “Backpaging” on
page 59.
Table 5-6. TSO interface output parameters for 3270s
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
To Next Page
Loading...