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Mar 14, 2011 · In simple cases, a 32 bit processor will have a 32 bit "word" size (and pointer size). A 64 bit processor will have a 64 bit "word" size (and pointer size). There is a wikipedia article on this "processor word" concept, which details all the generic uses of the term, and the sizes for several current and historical CPU architectures.
Word (computer architecture) In computing, a word is the natural unit of data used by a particular processor design. A word is a fixed-sized datum handled as a unit by the instruction set or the hardware of the processor. The number of bits or digits [a] in a word (the word size, word width, or word length) is an important characteristic of any ...
- Bytes
- Bytes, Processors, and Programming
- Words
- Words and Operations
- Conclusion
The smallest unit of digital information is the binary bit. Modern processors don’t however perform direct operations on them, not even bitwise logic. Instead, they operate on collections of bits that take the name of bytes, and that are the smallest units of information that they can address in the memory. The byte today consists of 8 bits, but th...
A byte is also the smallest unit of information that can have an address in the memory of a computer. While digital information uses bits as its fundamental unit, processors don’t directly operate on bits. Instead, they retrieve from the memory a byte containing the bit on which they need to operate. Then, they compute the required operation and st...
A word, instead, is a unit for data processing that’s specific to given computer architecture. We saw how the size of a byte originates from the encoding of characters; the size of a word, instead, depends on the instruction set of a processor. The word is, usually, the sequence of bits that can be transferred from the working memory to the registe...
Words can also have different structures, in the sense that they comprise bits with different meanings. Typical operations on words, such as logical manipulation, floating-point arithmetic, or address arithmetic, each use individual word structures. As an example, this is a structure for a 64-bit word for floating-point arithmetics: Where indicates...
In this tutorial, we analyzed the characteristics of words and bytes and discussed their different relationships with memory and processors.
1 byte: mov al, 5 (low byte) or mov ah, 5 (high byte) You are correct that an address is 4 bytes for a 32 bit system or 8 bytes for a 64 bit system, but you can still load and store the value contained within those addresses. E.g. assuming you have a character array stored in esi: mov al, [esi] ; load byte pointed by esi into low byte of eax
Jan 8, 2014 · one byte can hold numbers 0..9; one word consists of two bytes; Here's an empty 2-word memory: 0 0 0 0 Let's store the number 4: 0 4 0 0 Now let's add 9: 1 3 0 0 Notice that both operands would fit in one byte, but not the result. But we have another one ready to use. Now let's store 99: 9 9 0 0 Again, we have used second byte to store the number.
Primitive values do not share state with other primitive values. The eight primitive data types supported by the Java programming language are: byte: The byte data type is an 8-bit signed two's complement integer. It has a minimum value of -128 and a maximum value of 127 (inclusive). The byte data type can be useful for saving memory in large ...
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The basic unit of information in a computer is the bit; it is simply a quantity that takes one of two values, 0 or 1. A sequence of k bits is a. k-bit word. Words have no intrinsic meaning beyond the value of the bits. We can assign meaning to words by interpreting them in various ways.
