Code page 942 (abbreviated as CP942 or IBM-942) is one of IBM's extensions of

Shift JIS Shift JIS (Shift Japanese Industrial Standards, also SJIS, MIME name Shift_JIS, known as PCK in Solaris contexts) is a character encoding for the Japanese language, originally developed by a Japanese company called ASCII Corporation in conjuncti ...

. The coded character sets are

JIS X 0201 JIS X 0201, a Japanese Industrial Standard developed in 1969 (then called JIS C 6220 until the JIS category reform), was the first Japanese electronic character set to become widely used. It is either a 7-bit encoding or an 8-bit encoding, altho ...

JIS X 0208 JIS X 0208 is a 2-byte character set specified as a Japanese Industrial Standards, Japanese Industrial Standard, containing 6879 graphic characters suitable for writing text, place names, personal names, and so forth in the Japanese language. Th ...

, IBM extensions for IBM 1880 UDC and IBM extensions. It is the combination of the single-byte Code page 1041 and the double-byte

Code page 301 In communications and information processing, code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form, sometimes shortened or secret, for communication through a communication ...

. It is a superset of IBM-932, differing in its use of Code page 1041 in place of

Code page 897 Code page 897 (CCSID 897) is IBM's implementation of the 8-bit form of JIS X 0201. It includes several additional graphical characters in the C0 control characters area, and the code points in question may be used as control characters or graphica ...

for its single byte codes. Code page 1041 is an extension of Code page 897 and adds five single-byte characters. 0x80 is mapped to the

cent sign The cent is a monetary unit of many national currencies that equals of the basic monetary unit. Etymologically, the word 'cent' derives from the Latin word meaning hundred. The cent sign is commonly a simple minuscule (lower case) letter . ...

(¢), 0xA0 is mapped to the

pound sign The pound sign is the symbol for the pound unit of sterling – the currency of the United Kingdom and previously of Great Britain and of the Kingdom of England. The same symbol is used for other currencies called pound, such as the Gibralt ...

(£), 0xFD is mapped to the

not sign In logic, negation, also called the logical complement, is an operation that takes a proposition P to another proposition "not P", written \neg P, \mathord P or \overline. It is interpreted intuitively as being true when P is false, and false ...

(¬), 0xFE is mapped to the

backslash The backslash is a typographical mark used mainly in computing and mathematics. It is the mirror image of the common slash . It is a relatively recent mark, first documented in the 1930s. History , efforts to identify either the origin of ...

(\) and 0xFF is mapped to the

tilde The tilde () or , is a grapheme with several uses. The name of the character came into English from Spanish, which in turn came from the Latin '' titulus'', meaning "title" or "superscription". Its primary use is as a diacritic (accent) i ...

(~). These are all unassigned in Code page 897 and therefore IBM-932. Code page 942 contains standard 7-bit

ISO 646 ISO/IEC 646 is a set of ISO/IEC standards, described as ''Information technology — ISO 7-bit coded character set for information interchange'' and developed in cooperation with ASCII at least since 1964. Since its first edition in ...

codes, and Japanese characters are indicated by the high bit of the first byte being set to 1. Some code points in this page require a second byte, so characters use either 8 or 16 bits for encoding. Code page 1041, and therefore Code page 942, uses 0x5C for the

Yen sign The yen and yuan sign, ¥, is a currency sign used for the Japanese yen and the Chinese yuan currencies when writing in Latin scripts. This monetary symbol resembles a Latin letter Y with a single or double horizontal stroke. The symbol is usua ...

(¥) and 0x7E for the overline (‾), matching the lower half of

rather than

US-ASCII ASCII ( ), abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices. Because of ...

. However, the version of Code page 942 used in

International Components for Unicode International Components for Unicode (ICU) is an open-source project of mature C/ C++ and Java libraries for Unicode support, software internationalization, and software globalization. ICU is widely portable to many operating systems and environ ...

(called "ibm-942_P12A-1999" or "x-IBM942C") uses US-ASCII mappings for single-byte characters between 0x20 and 0x7E. This results in duplicate mapping for the tilde (0x7E and 0xFF) and the backslash (0x5C and 0xFE).

Layout

References

External links

IBM Code Page 942
{{character encoding

942 Year 942 ( CMXLII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. Events By place Europe * Summer – The Hungarians invade Al-Andalus (modern Spain) and besiege the fortress ...

Encodings of Japanese

Layout

See also

References

External links