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There were numerous difficulties to writing software that would work in both ASCII and EBCDIC. The gaps between letters made simple code that worked in ASCII fail on EBCDIC. For example for (c = 'A'; c <= 'Z'; ++ c) putchar (c); would print the alphabet from A to Z if ASCII is used, but print 41 characters (including a number of unassigned ones ...
BCD (binary-coded decimal), also called alphanumeric BCD, alphameric BCD, BCD Interchange Code, [1] or BCDIC, [1] is a family of representations of numerals, uppercase Latin letters, and some special and control characters as six-bit character codes. Unlike later encodings such as ASCII, BCD codes were not standardized. Different computer ...
A code point is a value or position of a character in a coded character set. [10] A code space is the range of numerical values spanned by a coded character set. [10] [12] A code unit is the minimum bit combination that can represent a character in a character encoding (in computer science terms, it is the word size of the character encoding).
UTF-EBCDIC is a character encoding capable of encoding all 1,112,064 valid character code points in Unicode using 1 to 5 bytes (in contrast to a maximum of 4 for UTF-8). [1] It is meant to be EBCDIC -friendly, so that legacy EBCDIC applications on mainframes may process the characters without much difficulty.
Code page 293 (CCSID 293), [20] called "APL (USA)", is an EBCDIC code page which includes APL symbols, in addition to preserving the basic Latin letters and Western Arabic numerals at their usual EBCDIC locations.
Of the 2 7 =128 codes, 33 were used for controls, and 95 carefully selected printable characters (94 glyphs and one space), which include the English alphabet (uppercase and lowercase), digits, and 31 punctuation marks and symbols: all of the symbols on a standard US typewriter plus a few selected for programming tasks.
Red light camera tickets: Not liable to ID the driver; some are fishing expeditions. Tech expert Kurt “CyberGuy" Knutsson helps you fight back against tricky fake tickets.
To include all these, and control characters compatible with the Comité Consultatif International Téléphonique et Télégraphique (CCITT) International Telegraph Alphabet No. 2 (ITA2) standard of 1932, [30] [31] FIELDATA (1956 [citation needed]), and early EBCDIC (1963), more than 64 codes were required for ASCII.