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All bits and bytes are arranged in big endian order in this document. That is, bit number 1 is always the most significant bit. ... 1: 7: 6: 0: 8: ... Key Compression ...
With Num Lock on, digit keys produce the corresponding digit. On Apple Macintosh computers, which lack a Num Lock key, the numeric keypad always produces only numbers; the Num Lock key is replaced by the Clear key. The arrangement of digits on numeric keypads with the 7-8-9 keys two rows above the 1-2-3 keys is derived from calculators and cash ...
A six-bit character code is a character encoding designed for use on computers with word lengths a multiple of 6. Six bits can only encode 64 distinct characters, so these codes generally include only the upper-case letters, the numerals, some punctuation characters, and sometimes control characters.
4 Line feed is used for "end of line" in text files on Unix / Linux systems. 5 Carriage Return (accompanied by line feed, and thus usually written as 'CRLF') is used as "end of line" character by Windows, MsDOS, and most minicomputers other than Unix- / Linux-based systems. Classic Mac OS used CR only. 6 Control-O has been the "discard output ...
It was created to extend the existing Binary-Coded Decimal (BCD) Interchange Code, or BCDIC, which itself was devised as an efficient means of encoding the two zone and number punches on punched cards into six bits. The distinct encoding of 's' and 'S' (using position 2 instead of 1) was maintained from punched cards where it was desirable not ...
The 6b/8b encoding is a balanced code-- each 8-bit output symbol contains 4 zero bits and 4 one bits. So the code can, like a parity bit , detect all single-bit errors. The number of 8-bit patterns with 4 bits set is the binomial coefficient ( 8 4 ) {\displaystyle {\tbinom {8}{4}}} = 70.
The straightforward translation from punched form would place the blank before digits 1–9, and encode 0 at the start of the line with 'S' in it. All codes have some special-case handling which either translates the digit 0 to the all-zero binary code (and moves the blank elsewhere), or gives it binary code 001010 (decimal 10) and moves the 8 ...
The Aiken code (also known as 2421 code) [1] [2] is a complementary binary-coded decimal (BCD) code. A group of four bits is assigned to the decimal digits from 0 to 9 according to the following table. The code was developed by Howard Hathaway Aiken and is still used today in digital clocks, pocket calculators and similar devices [citation needed].