NCR RealPOS XR4 7602, User Manual, Page: 106 / 152

2x20 Customer Display Interface 9-93
Set Diagnostic State On
Format
1B 04
Description
This state is exclusive from the On and Low Power States. This command causes the
firmware to display the current firmware part number of the device for five seconds,
and then step through each installed 256-character set (default and user-defined)
displaying one character at a time on all 40 display positions at a rate of about one
character per second. The firmware starts with the currently selected character set, and
then displays all of the characters from the other sets the same way. This continues until
one of the other state commands is performed. Prior display data is saved and can be
restored before sending the Set Display State On.
Note: The LCD only has one character set.
Select Character Set n
Format 1B20 - 1B32
Description
VFD only. This set of commands chooses one of the three supported internal character
sets or, if an external ROM is present, one of up to 16 additional character sets.
Character set 1 is defined as PC Code Page 858 (International), character set 2 is defined
as Katakana (Japanese), and character set 3 is defined as Code Page 866 (Cyrillic Eastern
European). Character sets 4 through 19 are only valid if an external ROM containing
extra character sets is present. Character set selection is dynamic. Host software can
switch between character sets at any time. Switching between sets does not erase or
change the display. This means characters from multiple character sets may be on a
display. The default character set is number 1, PC Code Page 858 (International).