Chapter 4. Coded Character Sets And Encodings in the World

33

4.5.8 HKSCS

HKSCS is an expansion and amendment of GCCS. It includes 4702 characters. It means Hong

Kong Supplementary Character Set.

In addition to a usage in User Defined Area in Big5, HKSCS defines a usage in Private Use Area

in Unicode.

4.5.9 Shift JIS

Shift JIS is one of popular encodings in Japan. Its CCS are JISX 0201 Roman, JISX 0201 Kana, and

JISX 0208.

JISX 0201 Roman is Japanese version of ISO 646. It defines yen currency mark for

0x5c

, where

ASCII has backslash.

0xa1

0xdf

is one byte character and is JISX 0201 Kana. Two byte character

(the first byte:

0x81

0x9f

and

0xe0

0xef

; the second byte:

0x40

0x7e

and

0x80

0xfc

) is

JISX 0208.

Japanese version of MS DOS, MS Windows and Macintosh use this encoding, though this encod 

ing is not often used in POSIX systems.

4.5.10 VISCII

Vietnamese language uses 186 characters (Latin alphabets with accents) and other symbols. It is a

bit more than the limit of ISO 8859 like encoding.

VISCII is a standard for Vietnamese. It is upward compatible with ASCII. It is 8bit and stateless,

like ISO 8859 series. However, it uses code points of not only

0x21

0x7e

and

0xa0

0xff

but also

0x02

,

0x05

,

0x06

,

0x14

,

0x19

,

0x1e

, and

0x80

0x9f

. This makes VISCII not ISO

2022 compliant.

Vietnam has a new, ISO 2022 compliant character set TCVN 5712 VN2 (aka VSCII). In TCVN

5712 VN2, accented characters are expressed as a combined character. Note that some of accented

characters have their own code points.

4.5.11 TRON

TRON (

http://www.tron.org/index e.html

) is a project to develop a new operating sys 

tem, founded as a collaboration of industries and academics in Japan since 1984.

The most diffused version of TRON operating system families is ITRON, a real time OS for embed 

ded systems. However, our interest is not on ITRON now. TRON determines a TRON encoding.