Character Table Select (09H, Table Code); Clear Display (12H); Luminance Control (11H, Luminance); Cursor Position (10H, Position) - NCR RealPOS 70XRT User Manual

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

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

Cursor Position (10h, POSITION)

This command sets the cursor position. The POSITION byte moves the cursor
position according to the table below. The next character byte writes to the new
position and the cursor auto‐increments to the next position. This command is
ignored if the POSITION byte value is greater than 27h.
1 2
1 00h 01h 02h 03h 04h 05h 06h 07h 08h 09h 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10h 11h 12h 13h
2 14h 15h 16h 17h 18h 19h 1Ah 1Bh 1Ch 1Dh 1Eh 1Fh 20h 21h 22h 23h 24h 25h 26h 27h
Character Table
01h Table 1
02h Table 2
03h Table 3
04h Table 4
Display Luminance
01h 25%
02h 50%
03h 75%
04h 100%
3 4 5 6 7 8 9 10 11
Chapter 8: 2x20 Customer Display Interface
12 13 14 15 16
8-3
17 18 19 20