UTF-EBCDIC

UTF-EBCDIC is a character encoding based on UTF-8 but engineered to be more friendly to systems using EBCDIC rather than ASCII-based character sets. It is designed to allow raw code points in the C1 controls range in order to encode EBCDIC control characters, and the 7-bit character range is sent through a reversible transformation so that the characters in this range are encoded in their EBCDIC code positions rather than those of ASCII. This encoding has not had much use, even on mainframes that still use EBCDIC, since they have usually been set up to use UTF-16 directly in applications requiring full Unicode support.

Links

 * Wikipedia article
 * Unicode Technical Report 16