NCR 7169 - Thai Character Data Procedure

E-162 Thai Font Support
Thai Character Data Procedure
Thai character data string uses the following format:
Base character, <Below character >, <Above character>, <Top character>,
Base character, ...
The procedure is as follows:
1. The printer checks whether the received character is the Base character. If the Top,
Above, and Below characters are sent before the Base character, these characters are
ignored.
2. After receiving the Base character, the printer checks the next character until it
receives the next Base character.
3. If the next character is the Below character, the Above character, or the Top
character, the printer checks whether these Thai characters are valid for the current
Base character. If they are valid, it merges these characters’ image with the Base
character’s image. If it is an invalid character, it will be ignored.
Notes for this Function
This function supports standard pitch font and compressed pitch font. Thai character
height is 34 dots. The following command functions change, and are different from
other code pages.
SYN
Add n Extra Dot Rows. When CP874 is selected, the line Pitch is 34
+ n dot.
ESC 2
Set Line Spacing to
1/6 inch.
When CP874 is selected, this command is
ignored.
ESC 3
Set Line Spacing. When CP874 is selected, valid parameter
value is >= 34.
The line pitch is changed by the following commands because the code page is changed.
ESC R
Select international character set.
ESC t
Select character code table.
Note: Same as ESC R.
ESC %
Set or cancel the user–defined character set.
ESC L
Set page mode.
ESC S
Select standard mode.
FF
Form Feed in page mode.