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Encyclopedia > Nibble
Unicode-Signs ordered by nibbles.
Unicode-Signs ordered by nibbles.

A nibble (or less commonly, nybble) is the computing term for a four-bit aggregation[1], or half an octet (an octet being an 8-bit byte). As a nibble contains 4 bits, there are sixteen (24) possible values, so a nibble corresponds to a single hexadecimal digit (thus, it is often referred to as a "hex digit" or "hexit"). Look up nibble in Wiktionary, the free dictionary. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... The Unicode Standard, Version 5. ... RAM (Random Access Memory) Look up computing in Wiktionary, the free dictionary. ... This article is about the unit of information. ... In computer technology and networking, an octet is a group of 8 bits. ... 8-bit refers to the number of bits used in the data bus of a computer. ... In computer science a byte (pronounced bite) is a unit of measurement of information storage, most often consisting of eight bits. ... In mathematics and computer science, hexadecimal, base-16, or simply hex, is a numeral system with a radix, or base, of 16, usually written using the symbols 0–9 and A–F, or a–f. ... In mathematics, hexadecimal or simply hex is a numeral system with a radix or base of 16 usually written using the symbols 0–9 and A–F or a–f. ...


A full byte (octet) is represented by two hexadecimal digits; therefore, it is common to display a byte of information as two nibbles. The nibble is often called a "semioctet" or a "quartet" in a networking or telecommunication context. Sometimes the set of all 256 byte values is represented as a table 16×16, which gives easily readable hexadecimal codes for each value. In computer technology and networking, an octet is a group of 8 bits. ... A computer network is an interconnection of a group of computers. ... Copy of the original phone of Alexander Graham Bell at the Musée des Arts et Métiers in Paris Telecommunication is the assisted transmission of signals over a distance for the purpose of communication. ... 256 (two hundred [and] fifty-six, CCLVI) is the natural number following 255 and preceding 257. ... 16 (sixteen) is the natural number following 15 and preceding 17. ...


The term "nibble" originates from the fact that the term "byte" is a pun on the English word "bite". A nibble is a small bite, which in this context is "humorously" construed as "half a bite". The alternative spelling "nybble" parallels the spelling of "byte", as noted in an editorial Kilobaud or Byte magazines in the early eighties.[citation needed] For other uses, see Pun (disambiguation). ... The English language is a West Germanic language that originates in England. ... Kilobaud Microcomputing magazine was a magazine dedicated to the computer homebrew hobbyists from the end of the 1970s until the beginning of the 1980s. ... The front cover of the April 1981 issue of BYTE (Vol 6. ...


The nibble is used to describe the amount of memory used to store a digit of a number stored in packed decimal format within an IBM mainframe. This technique is used to reduce space requirements, make computations faster, and make debugging easier. An 8-bit byte is split in half and each nibble is used to store one digit. The last nibble of the variable is reserved for the sign. Thus a variable which can store up to nine digits would be "packed" into 5 bytes. Ease of debugging resulted from the numbers being readable in a hex dump where two hex numbers are used to represent the value of a byte, as 16×16 = 28. In computing and electronic systems, binary-coded decimal (BCD) is an encoding for decimal numbers in which each digit is represented by its own binary sequence. ... A hexdump of a binary executable file. ... In mathematics, hexadecimal or simply hex is a numeral system with a radix or base of 16 usually written using the symbols 0–9 and A–F or a–f. ...


Historically, there have been cases where the term "nybble" was used for a set of bits fewer than 8, but not necessarily 4. In the Apple II microcomputer line, much of the disk drive control was implemented in software. Writing data to a disk was done by converting 256-byte pages into sets of 5-bit or, later, 6-bit nibbles; loading data from the disk required the reverse. Note that the term byte also had this ambiguity; at one time, byte meant a set of bits but not necessarily 8. Today, the terms "byte" and "nibble" generally refer to 8- and 4-bit collections, respectively, and are not often used for other sizes. The 1977 Apple II, complete with integrated keyboard, color graphics, sound, a plastic case and eight expansion slots. ...


The sixteen nibbles and their equivalents in other numeral systems:

The sixteen nibbles correspond with the operations in Boolean algebra and are thus more useful than the 3-bit-figures of the octal system.
0hex = 0dec = 0oct 0 0 0 0
1hex = 1dec = 1oct 0 0 0 1
2hex = 2dec = 2oct 0 0 1 0
3hex = 3dec = 3oct 0 0 1 1
4hex = 4dec = 4oct 0 1 0 0
5hex = 5dec = 5oct 0 1 0 1
6hex = 6dec = 6oct 0 1 1 0
7hex = 7dec = 7oct 0 1 1 1
8hex = 8dec = 10oct 1 0 0 0
9hex = 9dec = 11oct 1 0 0 1
Ahex = 10dec = 12oct 1 0 1 0
Bhex = 11dec = 13oct 1 0 1 1
Chex = 12dec = 14oct 1 1 0 0
Dhex = 13dec = 15oct 1 1 0 1
Ehex = 14dec = 16oct 1 1 1 0
Fhex = 15dec = 17oct 1 1 1 1
Every nibble matches a logic gate.
Every nibble matches a logic gate.

Contents

Image File history File links Download high-resolution version (1817x2571, 629 KB) The sixteen logic functions or junctors and thus the subsets of a set containing four elements form the rhombic-dodecahedral shadow of a tesseract when represented as a Hasse-diagram. ... Image File history File links Download high-resolution version (1817x2571, 629 KB) The sixteen logic functions or junctors and thus the subsets of a set containing four elements form the rhombic-dodecahedral shadow of a tesseract when represented as a Hasse-diagram. ... In mathematics and computer science, hexadecimal, base-16, or simply hex, is a numeral system with a radix, or base, of 16, usually written using the symbols 0–9 and A–F, or a–f. ... Boolean algebra is the finitary algebra of two values. ... The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7. ... For other senses of this word, see zero or 0. ... This article is about the number one. ... This article does not cite any references or sources. ... Look up three in Wiktionary, the free dictionary. ... This article discusses the number Four. ... Look up five in Wiktionary, the free dictionary. ... Look up six in Wiktionary, the free dictionary. ... Seven Days of Creation - 1765 book, title page 7 (seven) is the natural number following 6 and preceding 8. ... Look up eight in Wiktionary, the free dictionary. ... This article is about the number. ... This article is about the number 10. ... 11 (eleven) is the natural number following 10 and preceding 12. ... Look up twelve in Wiktionary, the free dictionary. ... 13 (thirteen) is the natural number following 12 and preceding 14. ... 14 (fourteen) is the natural number following 13 and preceding 15. ... 15 (fifteen) is the natural number following 14 and preceding 16. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... A logic gate performs a logical operation on one or more logic inputs and produces a single logic output. ...

Trivia

  • A related one-liner joke is: Computer programmers don't byte, they nibble a bit

A one-liner is a joke that is delivered in a single line. ...

See also

The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... A computer word is a measurement of the size of the natural amount of computer memory a particular computer uses. ...

References

  1. ^ Hall, D. V. (1980). Microprocessors and Digital Systems. McGraw-Hill. ISBN 0-07-025571-7. 

External links


  Results from FactBites:
 
Nibble - Wikipedia, the free encyclopedia (428 words)
A nibble (or less commonly, nybble) is the computing term for the aggregation of four bits, or half an octet (an octet being an 8-bit byte).
The nibble is often called a "semioctet" or a "quartet" in a networking or telecommunication context.
The term "nibble" originates from the fact that the term "byte" is a pun on the English word "bite".
  More results at FactBites »

 
 

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