TN3270 Server Manual

ITI Communication Protocol
TN3270 Server Manual—424097-001
6-3
ITI Considerations
•
The ITI protocol does not handle the BACKSPACE and LINE DELETE terminal
local operations.
•
The ITI protocol maintains an output line count and cursor address. The output data
display wraps. A screen separator of a line of equal signs (=) indicates the bottom of
the screen. The screen separator updates each time a READ or WRITEREAD
request is completed.
When the line count indicates the screen is full (that is, the next outbound data
overwrites the data just written), you are prompted to press the Enter key. If you
press Enter, the display resumes. If you press the Break key (PA1), the action is
treated as a break and returned to the application program. If you press the Ctrl-Y
key (PA2), the action is treated as a Control-Y and is returned to the application
program.
•
The ITI protocol does not support a two-step READ request.
•
The Field Mark key character is translated into a backslash (\) character.