6530 Programmer's Guide

Block Mode Operation
3-50
6530 Programmer’s Guide
Note In EM3270 mode, this sequence stores nulls rather than
spaces in the screen buffer.
Editing This group of escape sequences performs editing operations such as
inserting and deleting lines and characters. These operations do not affect
the current buffer address.
Insert Line (Esc L)
The Esc L sequence moves the display data down one line, starting at the
line containing the current buffer address. This results in the insertion of
a blank line at the buffer address and the deletion of the bottom line on
the page. If you want to save the data on the bottom line, your
application must read it and save it prior to issuing the Esc L sequence.
In protect submode, any field whose start-field address is located in the
bottom line is deleted. If the cursor is positioned into a protected field as
a result of the line insertion, the 6530 performs a forward tab to move the
cursor to the next unprotected position on the page.
Note In EM3270 mode, this sequence stores nulls rather than
spaces in the new line.
Delete Line (Esc M)
The Esc M sequence deletes the line containing the current buffer
address. This results in moving subsequent lines up one line and blank
filling the bottom line.
In protect submode, any field whose start-field address is located in the
deleted line is also deleted. If the cursor is positioned into a protected
field as a result of the line deletion, the 6530 performs a forward tab to
move the cursor to the next unprotected position on the page.
Note In EM3270 mode, this sequence stores nulls rather than
spaces in line 24.