IBM Professional Series User Manual page 360

DATADDR
is the virtual storage address of the first byte of data to
be displayed.
FLAGS
are standard CCW flags. The suppress-incorrect-Iength
indicator, bit 34, must be set to a value of one. Set other
bits as needed.
CTL
is a control byte defined as follows:
If the high-order bit (bit 0) is on, CP displays more
status before erasing the display station screen and
displaying the new data.
• Bits 2-7 identify the line on the display screen where
the display is to start. A value of 0 (B'xxOO 0000')
corresponds to the first or top line, a value of 1
(B'xxOO 0001 ') corresponds to the second line and
so forth.
If
the control byte contains the value X'FF', CP
clears the output area on the display screen. No new
data is displayed.
CCWs may be command chained to combine several
operations in one DIAGNOSE. If the control byte
contains a value of X'FE', CP will:
COUNT
Erase the entire screen.
Rewrite the attribute bytes for the CP screen
format.
Reset the cursor to the beginning of the input
area.
specifies the number of bytes of data to be displayed.
The maximum that can be specified for this command
code is 2032 bytes.
To provide attribute characters for the data, place the
attribute character in the data stream immediately following
a 3270 start-field order. The start-field order, a one-byte
Appendix A. CP/CMS Interface A-21