Character Encodings/Code Tables/EBCDIC/KEIS
KEIS is a stateful EBCDIC charset used in Hitachi mainframe systems. KEIS is an acronym for "Kanji processing Extended Information System". It is also known as Code page 1279.
Encoding structure
[edit | edit source]Here are the valid ranges of bytes according to its encoding structure.
| Byte Range Purpose | Byte Range in Hexadecimal | Comment |
|---|---|---|
| single byte | 41-F9 | Includes graphic characters. Does not include unassigned characters nor ISO control characters. |
| full width space | 40 40 or A1 A1 |
|
| shift to single byte mode | 0A 41 | |
| shift to double byte mode | 0A 42 | |
| first byte of double byte | 40, 41-FE | A1-CF is the basic set. D0-FE is extended set 1. 59-80 is extended set 2. 81-A0 are user defined characters. Byte 40 is only valid when followed by byte 40. |
| second byte of double byte | 40, 41-FE | 40 is only valid when preceded by byte 40. 0x40 0x40 makes the ideographic space character. Normally only A1-FE is used. |
References
[edit | edit source]- [Lunde, Ken. CJKV Information Processing. Sebastopol, Calif.: O'Reilly & Associates, 1998. ISBN 1-56592-224-7. (Note that Appendix D has a typo for the hexadecimal ranges for KEIS. The decimal ranges were used for the encoding structure.)