NCR RealPOS 72XRT POS - Character Table Select (09 H, TABLE CODE); Clear Display (12 H); Luminance Control (11 H, LUMINANCE)

2x20 Customer Display Interface 9-129
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%