6530 Programmer's Guide

Block Mode Operation
3-46
6530 Programmer’s Guide
The video and data attributes of the last field on the screen are also
enforced for the positions at the top of the screen. This effectively
overrides the Set Video Prior (Esc 7) setting.
Read with Address Extended (Esc - J)
The Esc - J sequence reads a specified area of the selected page by using
either the normal or extended addressing format described in “Cursor and
Buffer Addressing” on page 3-13. The format for the escape sequence is
as follows:
Esc - start-row ; start-column ; end-row ; end-column J
where:
start-row and start-column are decimal numbers that
specify the beginning location for the area to be read (read start
address).
end-row and end-column are decimal numbers that specify the
ending location for the areas to be read (read end address).
J terminates the sequence.
For example the following sequence reads an area starting at row 5,
column 5 and ending at row 10, column 72;
IBH - 5;5;10;72 J
The Esc - J sequence functions exactly like the Esc = sequence, except
for the difference in format.
Read with Address All (Esc ])
The Esc ] sequence reads a specified area of the selected page with
normal addressing format as described in “Cursor and Buffer
Addressing” on page 3-13. The format for the escape sequence is:
Esc ] start-row start-column end-row end-column
where:
start-row and start-column are encoded ASCII characters
that specify the beginning location of the area to be read (read start
address).
end-row and end-column are encoded ASCII characters that
specify the ending location of the area to be read (read end address).