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LOAD the word containing the target byte; AND the target word with a mask to zero out the target byte; OR the registers containing the source and target words to insert the source byte; STORE the result back in the target location; Alternatively many word-oriented machines implement byte operations with instructions using special byte pointers ...
The byte, 8 bits, 2 nibbles, is possibly the most commonly known and used base unit to describe data size. The word is a size that varies by and has a special importance for a particular hardware context. On modern hardware, a word is typically 2, 4 or 8 bytes, but the size varies dramatically on older hardware.
The byte is a unit of digital information that most commonly consists of eight bits. 1 byte (B) = 8 bits (bit).Historically, the byte was the number of bits used to encode a single character of text in a computer [1] [2] and for this reason it is the smallest addressable unit of memory in many computer architectures.
Frequently, half, full, double and quadruple words consist of a number of bytes which is a low power of two. A string of four bits is usually a nibble . In information theory , one bit is the information entropy of a random binary variable that is 0 or 1 with equal probability, [ 3 ] or the information that is gained when the value of such a ...
The PDP-10 uses word addressing with 36-bit words and 18-bit addresses. Most Cray supercomputers from the 1980s and 1990s use word addressing with 64-bit words. The Cray-1 and Cray X-MP use 24-bit addresses, while most others use 32-bit addresses. The Cray X1 uses byte addressing with 64-bit addresses. It does not directly support memory ...
16-bit words are stored little-endian with least significant bytes at the lower address. Words are always aligned to even memory addresses. Words can be held in registers R0 through R7. 32-bit double words in the Extended Instruction Set (EIS) can only be stored in register pairs with the lower word being stored in the lower-numbered register ...
Each byte in a bytestring is encoded as a single word. A sequence of bytes is rendered in network byte order, from left to right. For example, the leftmost (i.e. byte 0) is considered "even" and is encoded using the PGP Even Word table. The next byte to the right (i.e. byte 1) is considered "odd" and is encoded using the PGP Odd Word table.
This timeline of binary prefixes lists events in the history of the evolution, development, and use of units of measure that are germane to the definition of the binary prefixes by the International Electrotechnical Commission (IEC) in 1998, [1] [2] used primarily with units of information such as the bit and the byte.