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A double-byte character set (DBCS) is a character encoding in which either all characters (including control characters) are encoded in two bytes, or merely every graphic character not representable by an accompanying single-byte character set is encoded in two bytes (Han characters would generally comprise most of these two-byte characters).
As these were typically encoded in a DBCS (double-byte character set), this also meant that their width on screen in a duospaced font was proportional to their byte length. Some terminals and editing programs could not deal with double-byte characters starting at odd columns, only even ones (some could not even put double-byte and single-byte ...
The double-byte codes are laid out in 94 numbered groups, each called a row (区, ku, lit. "section"). Every row contains 94 numbered codes, each called a cell ( 点 , ten , lit. "point") . [ j ] This makes a total of 8836 (94 × 94) possible code points (although not all are assigned, see below); these are laid out in the standard in a 94-line ...
Samples of Monospaced typefaces Typeface name Example 1 Example 2 Example 3 Anonymous Pro [1]Bitstream Vera Sans Mono [2]Cascadia Code: Century Schoolbook Monospace
The Unicode standard does not specify or create any font (), a collection of graphical shapes called glyphs, itself.Rather, it defines the abstract characters as a specific number (known as a code point) and also defines the required changes of shape depending on the context the glyph is used in (e.g., combining characters, precomposed characters and letter-diacritic combinations).
If the first byte is odd, the second byte must be in the range 0x40 to 0x9E (but cannot be 0x7F); if the first byte is even, the second byte must in the range 0x9F to 0xFC. Shift JIS only guarantees that the first byte of two-byte characters will be high-bit-set (0x80–0xFF); the value of the second byte can be either high or low.
It is used in the mapping of some IBM encodings for Korean, such as IBM code page 933, which allows the use of the Shift Out and Shift In characters to shift to a double-byte character set. [5] Since the double-byte character set could contain compatibility jamo, halfwidth variants are needed to provide round-trip compatibility. [6] [7]
Under double-byte character set Windows environments, specifying this font may also cause applications to use non-System fonts when displaying texts. In Windows 2000 or later, changing script setting in some application's font dialogue (e.g. Notepad, WordPad) causes the font to look completely different, even under same font size. Similarly ...