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- Endianness abstract "The terms endian and endianness refer to the convention used to interpret the bytes making up a data word when those bytes are stored in computer memory. In computing, memory commonly stores binary data by organizing it into 8-bit units called bytes. When reading or writing a data word consisting of multiple such units, the order of the bytes stored in memory determines the interpretation of the data word. Each memory storage location is associated with an index, called its address, which indicates its position. Bytes of a single data word are generally stored in consecutive memory addresses (e.g. a 32-bit int needs 4 such locations).Big-endian systems store the most significant byte of a word in the smallest address and the least significant byte is stored in the largest address (also see Most significant bit).Little-endian systems, in contrast, store the least significant byte in the smallest address. The illustration to the right shows an example using the data word "0A 0B 0C 0D" (a set of 4 bytes written out using left-to-right positional, hexadecimal notation) and the four memory locations with addresses a, a+1, a+2 and a+3; then, in big-endian systems, byte 0A is stored in a, 0B in a+1, 0C in a+2 and 0D in a+3. In little-endian systems, the order is reversed with 0D stored in memory address a, 0C in a+1, 0B in a+2, and 0A in a+3.An example on endianness is to think of how a decimal number is written and read in place-value notation. Since a number is written left to right, the leftmost position is analogous to the smallest address of memory used, and rightmost position the largest. For example, the number one hundred twenty three is written 1 2 3, with the hundred’s place left-most. Anyone who reads this number also knows that the leftmost digit has the biggest place value. This is an example of a big-endian convention followed in daily life. The little-endian way of writing the same number would be to put the units digit in leftmost position: 3 2 1. A person following place-value notation who is not alerted of this special ordering would assume the number was three hundred and twenty one. Endianness in computing is similar, but it applies to the ordering of bytes in memory (groups of typically 8 base 2 digits) instead of the ordering of decimal (base 10) digits on paper.Both forms of endianness are in widespread use in computing and networking. The initial endianness design choice was (is) mostly arbitrary, but later technology revisions and updates perpetuate the same endianness (and many other design attributes) to maintain backward compatibility. As examples, the Intel x86 processor represents a common little-endian architecture, and IBM z/Architecture mainframes are all big-endian processors. The designers of these two processor architectures fixed their endiannesses in the 1960s and 1970s with their initial product introductions to the market. Big-endian is the most common convention in data networking (including IPv6), hence its pseudo-synonym network byte order, and little-endian is popular (though not universal) among microprocessors in part due to Intel's significant historical influence on microprocessor designs. Mixed forms also exist, for instance the ordering of bytes within a 16-bit word may differ from the ordering of 16-bit words within a 32-bit word. Such cases are sometimes referred to as mixed-endian or middle-endian. There are also some bi-endian processors which can operate either in little-endian or big-endian mode.Endianness is important as a low-level attribute of a particular data format. Failure to account for varying endianness across architectures when writing software code for mixed platforms and when exchanging certain types of data might lead to failures and bugs, though these issues have been understood and properly handled for many decades.".
- Endianness thumbnail Big-Endian.svg?width=300.
- Endianness wikiPageExternalLink endianness05.pdf.
- Endianness wikiPageExternalLink understanding-big-and-little-endian-byte-order.
- Endianness wikiPageExternalLink ByteOrdering.html.
- Endianness wikiPageExternalLink freeabs_all.jsp?arnumber=1667115.
- Endianness wikiPageExternalLink freeabs_all.jsp?arnumber=56322.
- Endianness wikiPageExternalLink endianness.
- Endianness wikiPageExternalLink Endianness.
- Endianness wikiPageExternalLink index.html?ca=drs-.
- Endianness wikiPageExternalLink ien137.txt.
- Endianness wikiPageExternalLink xlong.
- Endianness wikiPageID "43026".
- Endianness wikiPageRevisionID "606155104".
- Endianness hasPhotoCollection Endianness.
- Endianness subject Category:Computer_memory.
- Endianness subject Category:Data_transmission.
- Endianness subject Category:Metaphors.
- Endianness type Abstraction100002137.
- Endianness type Communication100033020.
- Endianness type Device107068844.
- Endianness type ExpressiveStyle107066659.
- Endianness type Metaphor107106800.
- Endianness type Metaphors.
- Endianness type RhetoricalDevice107098193.
- Endianness type Trope107105475.
- Endianness comment "The terms endian and endianness refer to the convention used to interpret the bytes making up a data word when those bytes are stored in computer memory. In computing, memory commonly stores binary data by organizing it into 8-bit units called bytes. When reading or writing a data word consisting of multiple such units, the order of the bytes stored in memory determines the interpretation of the data word.".
- Endianness label "Byte-Reihenfolge".
- Endianness label "Endianness".
- Endianness label "Endianness".
- Endianness label "Endianness".
- Endianness label "Endianness".
- Endianness label "Extremidade (ordenação)".
- Endianness label "Kolejność bajtów".
- Endianness label "Ordine dei byte".
- Endianness label "Порядок байтов".
- Endianness label "エンディアン".
- Endianness label "字节序".
- Endianness sameAs Endianita.
- Endianness sameAs Byte-Reihenfolge.
- Endianness sameAs Endianness.
- Endianness sameAs Endianness.
- Endianness sameAs Endianness.
- Endianness sameAs Ordine_dei_byte.
- Endianness sameAs エンディアン.
- Endianness sameAs 엔디언.
- Endianness sameAs Endianness.
- Endianness sameAs Kolejność_bajtów.
- Endianness sameAs Extremidade_(ordenação).
- Endianness sameAs m.0btd4.
- Endianness sameAs Q339338.
- Endianness sameAs Q339338.
- Endianness sameAs Endianness.
- Endianness wasDerivedFrom Endianness?oldid=606155104.
- Endianness depiction Big-Endian.svg.
- Endianness isPrimaryTopicOf Endianness.