DKOI (, "Binary Code for Information Processing") is an

EBCDIC Extended Binary Coded Decimal Interchange Code (EBCDIC; ) is an eight- bit character encoding used mainly on IBM mainframe and IBM midrange computer operating systems. It descended from the code used with punched cards and the corresponding si ...

encoding for Russian Cyrillic. It is a

Telegraphy Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pi ...

-based encoding used in ES EVM mainframes. It has been defined by several standards:

GOST GOST () refers to a set of international technical standards maintained by the Euro-Asian Council for Standardization, Metrology and Certification (EASC), a regional standards organization operating under the auspices of the Commonwealth of I ...

19768-74 / ST SEV 358-76, ST SEV 358-88 / GOST 19768-93, CSN 36 9103.

DKOI K1

In DKOI K1 (ДКОИ К1), each Cyrillic letter is given its own code point. Characters are shown with their equivalent

Unicode Unicode or ''The Unicode Standard'' or TUS is a character encoding standard maintained by the Unicode Consortium designed to support the use of text in all of the world's writing systems that can be digitized. Version 16.0 defines 154,998 Char ...

codes. The dollar sign may be placed in code point 0x5B; in that case the currency sign is in code point 0xE1.

DKOI K2

In DKOI K2 (ДКОИ К2), some Cyrillic letters (А, В, Е, К, М, Н, О, Р, С, Т, Х, а, е, о, р, с, у, х) are merged with visually identical Latin letters (A, B, E, K, M, H, O, P, C, T, X, a, e, o, p, c, y, x). Code points 0x5F and 0xA1 are

negation In logic, negation, also called the logical not or logical complement, is an operation (mathematics), operation that takes a Proposition (mathematics), proposition P to another proposition "not P", written \neg P, \mathord P, P^\prime or \over ...

and

overline An overline, overscore, or overbar, is a typographical feature of a horizontal and vertical, horizontal line drawn immediately above the text. In old mathematical notation, an overline was called a ''vinculum (symbol), vinculum'', a notation fo ...

instead of and . The dollar sign may be placed in code point 0x5B; in that case the currency sign is in code point 0xE1.

Code page 880

IBM International Business Machines Corporation (using the trademark IBM), nicknamed Big Blue, is an American Multinational corporation, multinational technology company headquartered in Armonk, New York, and present in over 175 countries. It is ...

code page 880 is mostly a superset of DKOI K1, adding support for Cyrillic letters not used in Russian but used in

Serbian Cyrillic The Serbian Cyrillic alphabet (, ), also known as the Serbian script, (, ), is a standardized variation of the Cyrillic script used to write the Serbian language. It originated in medieval Serbia and was significantly reformed in the 19th cen ...

, Macedonian Cyrillic, Belarusian Cyrillic or Soviet-era Ukrainian Cyrillic (i.e. including the

Ukrainian Ye Ukrainian Ye or Round Ye (Є є; italics: ) is a character of the Cyrillic script. It is a separate letter in the Ukrainian alphabet, the Pannonian Rusyn alphabet, and both the Carpathian Rusyn alphabets; in all of these, it comes directly ...

but not the Ukrainian Ge). 0x6A is a continuous vertical bar (like in code page 38), rather than a broken vertical bar (like in code pages 37 and 500), and 0x5B is always a dollar sign rather than a universal currency sign. This matches the

character repertoire Character encoding is the process of assigning numbers to graphical characters, especially the written characters of human language, allowing them to be stored, transmitted, and transformed using computers. The numerical values that make up a c ...

of KOI8-E.

Code page 1025

Code page 1025 is almost identical to code page 880, but the universal currency sign (¤) is replaced with a

section sign The section sign (§) is a typographical character for referencing individually numbered sections of a document; it is frequently used when citing sections of a legal code. It is also known as the section symbol, section mark, double-s, or si ...

(§), thus matching the

of ISO 8859-5.

Code page 410

Code page 410 differs from code pages 880 and 1025 by lacking braces,

backtick The backtick is a typographical mark used mainly in computing. It is also known as backquote, grave, or grave accent. The character was designed for typewriters to add a grave accent to a (lower-case) base letter, by overtyping it atop that let ...

and

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

, including

exponent In mathematics, exponentiation, denoted , is an operation involving two numbers: the ''base'', , and the ''exponent'' or ''power'', . When is a positive integer, exponentiation corresponds to repeated multiplication of the base: that is, i ...

s of 2 and 3 and the numeric space, and including both the section sign and the universal currency sign in different locations to code pages 880 and 1025.

Footnotes

References

{{Character encoding Character sets EBCDIC code pages