NCR RealPOS 70, User Manual

Page: 221 / 306

Chapter 10: 2x20 Customer Display Interface 10-3
Character Table Select (09h, TABLE CODE)
This command selects which character table to display. The TABLE
CODE byte determines the character set as defined in the table below.
If bits 0 to 3 are all zero then this command is ignored. When a new
character table is selected all characters on the display will be updated
to display the character of the new table. After a reset the character
table is set to Table 1.
Table Code Character Table
01h Table 1
02h Table 2
03h Table 3
04h Table 4
Clear Display (12h)
This command sets all 40 characters to
20h (space)
and moves the
cursor to the first position of the top line.
Luminance Control (11h, LUMINANCE)
This command selects the display luminance. The LUMINANCE byte
sets the display luminance level as defined in the table below. This
command is ignored if the LUMINANCE byte is
00h
.
LUMINANCE Display Luminance
01h 25%
02h 50%
03h 75%
04h 100%