Wincor Nixdorf BA63G, Product Manual

Page: 12 / 37

Customer display control
GB - 7
Pattern Values Features
00h – 1Fh
(Special control
characters)
This group of characters is not displayed.
20h – 7Fh
(Latin characters)
Consists of ‘0’ – ‘9’, ‘A’ – ‘ Z’, ‘a’ – ‘z’ and some common
symbols.
80h – FFh
(Thai patterns)
4 patterns overlap each other (with offset of 1 pixel down) to
form 1 complete Thai character.
For special control characters, since they are not displayed, the pixel coordinate
remains unchanged.
For Latin characters, the firmware operates in the similar manner as the screen
coordinate. After displaying the Latin character, the pixel coordinate will advance by 8
pixels to the right, which is equivalent to 1 column in the text mode. For example, if the
initial pixel coordinate is at (0;0), after displaying a Latin character the pixel coordinate is
auto-update to (8;0).
Thai characters are constructed in four levels. Application must always send a 4-byte
sequence for each Thai character where the 1
st
byte refers to level 1, 2
nd
byte is level 2,
etc. When in the country code is set to Thai, character codes in the range from 80h to
FFh are recognized as Thai elements. It is possible to mixed Thai characters and ASCII
characters (20h to 7Fh) in a single display line. The resultant character cell size is 8x19.
Below is the table that illustrates of how the Thai character is formed:
First
Byte Second
Byte
Third
Byte
Last
Byte
Pixel
Coordinate
(20,20)
→
(20,21)
(20,21)
→
(20,22)
(20,22)
→
(20,23)
(20,23)
→
(28,20)
Value E9h A0h BCh D9h
Pattern (blank)
Resultant
Pattern
For first byte group, it consists of fonts at locations E8h, E9h, EAh, EBh and ECh.
These are Thai tone marks and Thai cancellation mark. They appear at the topmost of
the base character.
For second byte group, it consists of fonts at locations D1h, D4h, D5h, D6h, D7h and
E7h. These are Thai vowels. They appear immediately on top of the base character.
For third byte group, it is the base character.
For fourth byte group, it consists of fonts at locations D8h, D9h and DAh. These are
Thai vowels. They appear below the base character.