Table of Contents
Advertisement
FM (Field Mark):
Using the FM function causes a semicolon (;) to be displayed at
the current cursor location. The field mark character is used to inform the
application program of the end of a field (in an unformatted screen) or a subfield (in
a formatted screen). This function cannot
be
used when operating as the 3708
control terminal.
Using this function when the cursor is located in an attribute character location or is
in a protected field locks the keyboard (the "go elsewhere"
(X
<-OP-» status line
message is displayed). To unlock the keyboard, press the Reset Key sequence
defined for your terminal and reposition the cursor.
Program Attention Functions (Enter, Clear, PF keys, and PA keys):
These functions
cause the 3708 to transfer information to the host program. An Attention
IDentification character (AID) is sent to the host which identifies which of the
functions was used to cause the transfer. This function cannot be used when
operating as the 3708 control terminal.
The Clear function clears all positions on the screen to nulls and positions the cursor
to the upper left hand comer. When supporting large screens (3270 Model
Emulation
=
3,4, or 5), pressing CLEAR returns the screen to its default size. This
screen size is defined by the BIND command. To prevent the screen size from
returning to the default size, set nonstandard operating bit 6 to
1.
Note: Using a PF key or PA key function while SSCP is displayed on the status
line, locks the keyboard (the "function not supported" message
(X
-F) is displayed
on the status line). To unlock the keyboard, press the Reset Key sequence defined
for your terminal and reposition the cursor.
SYS REQ (System Request):
Use the SYS REQ function to switch from
communication with your application program to communication with the host
control program. SYS REQ clears the screen and your terminal returns to the
default screen size specified by the BIND. This function cannot be used when
operating as the 3708 control terminal.
Logoff your application program using the SYS REQ function. Enter the SYS REQ
key sequence to communicate with the host control program, then enter the logoff
command.
See "SSCP Communication to Displays" on page 3-50 for a description of how the
terminal operates when communicating with the host control program.
DEV CNCL (Device Cancel):
If
your keyboard is locked because of a "printer busy"
condition
(X
PRTBSY on the status line), and you wish to cancel your print request,
you should use the DEV CNCL function.
Using the DEV CNCL function during a IDENT operation causes the operation to
end. The previous printer ID is displayed on the status line.
Once the printing has begun, the DEV CNCL function has no effect.
CURSR SEL (Cursor Select):
This function allows the selector-light-pen-detection
function to be performed from the keyboard. This function cannot be used when
operating as the 3708 control terminal.
Chapter 4. Protocol Conversion Mode
4-49
Advertisement
Table of Contents
