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  2. Pointer (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Pointer_(computer_programming)

    In the simplest scheme, an address, or a numeric index, is assigned to each unit of memory in the system, where the unit is typically either a byte or a word – depending on whether the architecture is byte-addressable or word-addressable – effectively transforming all of memory into a very large array.

  3. Byte addressing - Wikipedia

    en.wikipedia.org/wiki/Byte_addressing

    An eight-bit processor like the Intel 8008 addresses eight bits, but as this is the full width of the accumulator and other registers, this could be considered either byte-addressable or word-addressable. 32-bit x86 processors, which address memory in 8-bit units but have 32-bit general-purpose registers and can operate on 32-bit items with a ...

  4. Data structure alignment - Wikipedia

    en.wikipedia.org/wiki/Data_structure_alignment

    A memory address a is said to be n-byte aligned when a is a multiple of n (where n is a power of 2). In this context, a byte is the smallest unit of memory access, i.e. each memory address specifies a different byte. An n-byte aligned address would have a minimum of log 2 (n) least-significant zeros when expressed in binary.

  5. Byte - Wikipedia

    en.wikipedia.org/wiki/Byte

    Various implementations of C and C++ reserve 8, 9, 16, 32, or 36 bits for the storage of a byte. [67] [68] [f] In addition, the C and C++ standards require that there be no gaps between two bytes. This means every bit in memory is part of a byte. [69] Java's primitive data type byte is defined as eight bits. It is a signed data type, holding ...

  6. 128-bit computing - Wikipedia

    en.wikipedia.org/wiki/128-bit_computing

    A processor with 128-bit byte addressing could directly address up to 2 128 (over 3.40 × 10 38) bytes, which would greatly exceed the total data captured, created, or replicated on Earth as of 2018, which has been estimated to be around 33 zettabytes (over 2 74 bytes). [1] A 128-bit register can store 2 128 (over 3.40 × 10 38) different values.

  7. Memory address - Wikipedia

    en.wikipedia.org/wiki/Memory_address

    In a computer using virtual memory, accessing the location corresponding to a memory address may involve many levels. In computing, a memory address is a reference to a specific memory location in memory used by both software and hardware. [1] These addresses are fixed-length sequences of digits, typically displayed and handled as unsigned ...

  8. Bitwise operations in C - Wikipedia

    en.wikipedia.org/wiki/Bitwise_operations_in_C

    The reason for this is that a byte is normally the smallest unit of addressable memory (i.e. data with a unique memory address). This applies to bitwise operators as well, which means that even though they operate on only one bit at a time they cannot accept anything smaller than a byte as their input.

  9. Bit array - Wikipedia

    en.wikipedia.org/wiki/Bit_array

    The Boost C++ Libraries provide a dynamic_bitset class [4] whose size is specified at run-time. The D programming language provides bit arrays in its standard library, Phobos, in std.bitmanip. As in C++, the [] operator does not return a reference, since individual bits are not directly addressable on most hardware, but instead returns a bool.