NCR RealPOS 25 - Character Table Select (09 H, TABLE CODE); Clear Display (12 H); Luminance Control (11 H, LUMINANCE); Cursor Position (10 H, POSITION)

2x20 Customer Display Interface 8-109
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 Lumin-
ance
01h 25%
02h 50%
03h 75%
04h 100%
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 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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