6530 Programmer's Guide

Block Mode Operation
6530 Programmer’s Guide 3-35
Note Note: The Esc Q sequence will transmit the data starting with
an RS character if the enhanced color field is set in the protect
submode; otherwise, an STX character is transmitted, similar to
Esc =.
where:
RS is a hex 1E.
vid1 , da1 , and da2 have the same format and content as the
conventional Start Field Extended (ESC ]) command parameters.
data refers to the IBM 3270-style attribute pairs 42H (foreground
color) and 45H (background color). Either or both of these codes are
valid values in the data field, followed by the hex values of the
desired colors. Any other values are ignored.
See “Start Enhanced Color Field (Esc ’)” on page 3-33 for more details on
the video and data attributes and the 3270 style attribute pairs that are
contained in the pair count and data pairs.
Protect Submode This group of escape sequences applies only to protect submode. They
perform functions such as entering and exiting protect submode, defining
fields and the data type table, and resetting MDTs.
Note Because entering or exiting from protect submode clears all
pages to blanks, the Esc W and the Esc X sequences should be
issued in a separate call to the WRITE procedure before calls
that write to display memory.
Enter Protect Submode (Esc W)
The Esc W sequence places the 6530 in protect submode. In that mode,
the 6530 performs the following initialization procedures:
Clear all pages to blanks (set default field)
Set the video prior condition register to normal video for all pages
Select page 1
Display page 1
Set the buffer address to line l, column 1 for all pages