NCR RealPOS XR4 7602, User Manual

Page: 115 / 152

9-102 2x20 Customer Display Interface
Read Display ID String
Format
1B 19
Returns
0x1A, "NCR 7703, xxx-xxxxxxx"
Description
where 0x1A is a 1 byte string length indicator which indicates the length of the string
that follows the string length indicator. For example, 1AH characters are sent after the
string length indicator. Note:
indicates a space character (20H). The quotation marks
“” are not part of the string and are not returned. XXX-XXXXXXX represents the
current firmware part number.
Description: This command is a request for the Retail Display to return an ASCII string
with detailed product information.
Display ESC Character
Format 1B 12
Description
This command is a request for the ESC character to be displayed at the current cursor
position.
Set Display State On
Format 1B 05
Description
This state is used for normal run-time conditions. This operation instructs the firmware
to leave one of the other states and begin performing normal refresh operations. There
may be a slight delay before the Vacuum Fluorescent Display (VFD) reaches the
specified brightness setting when exiting the Low Power State. This delay should not
exceed 1 second from the time the command is received until the time the VFD reaches
the specified brightness.
The Screen Save feature may be in force during the Display On state. This means that
after about five minutes of no new display activity, the Screen Save feature could take
over and cause the display to go blank or begin walking from right to left.