Command Codes; User Defined Character Definition (08H, Code, Byte1; Character Table Select (09H, Table Code) - NCR RealPOS 70XRT User Manual

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8-2
Chapter 8: 2x20 Customer Display Interface

Command Codes

User Defined Character Definition (08h, CODE, Byte1...Byte5)
This command defines a user defined character (UDC). The UDC character code is set by the
CODE byte and must be 00H to 07H. All other values for CODE will be ignored by this
command. The five bytes following a valid CODE byte define the character. D1 through D40
represent the character dots. A (1) indicates the dot is on and (0) indicates the dot is off in the
following format:
BYTE#

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
Bit 7
Bit 6
1
D1
D2
2
D9
D10
3
D17
D18
4
D25
D26
5
D33
D34
Character Table
01h
Table 1
02h
Table 2
03h
Table 3
04h
Table 4
D1
D2
D3
D6
D7
D8
D11
D12
D13
D16
D17
D18
D21
D22
D23
D26
D27
D28
D31
D32
D33
D36
D37
D38
5 x 8 Dot Matrix Character
Bit 5
Bit 4
Bit 3
D3
D4
D5
D11
D12
D13
D19
D20
D21
D27
D28
D29
D35
D36
D37
D4
D5
D9
D10
D14
D15
D19
D20
D24
D25
D29
D30
D34
D35
D39
D40
Bit 2
Bit 1
Bit 0
D6
D7
D8
D14
D15
D16
D22
D23
D24
D30
D31
D32
D38
D39
D40

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