In computing, a nibble (occasionally nybble, nyble, or nybl to match the spelling of byte) is a four-bit aggregation, or half an octet.It is also known as half-byte or tetrade. In a networking or telecommunication context, the nibble is often called a semi-octet, quadbit, or quartet. A nibble has sixteen (2 4) possible values.A nibble can be represented by a single hexadecimal digit …

unsigned char b; // reverse this (8-bit) byte b = (b * 0x0202020202ULL & 0x010884422010ULL) % 1023; The multiply operation creates five separate copies of the 8-bit byte pattern to fan-out into a 64-bit value. The AND operation selects the bits that are in the correct (reversed) positions, relative to each 10-bit groups of bits.

Jan 01, 2010 · A microprocessor is specified b y its ‘Word Size’, e. g. 4-bit, 8-bit, 16-bit etc. B y the term ‘word size ” means the n umber of bits of data that is processed by the microprocessor as a ...

A four-bit quantity is known as a nibble (when eating, being smaller than a bite) or nybble (being a pun on the form of the word byte). One nibble corresponds to one digit in hexadecimal and holds one digit or a sign code in binary-coded decimal.

A byte is referred to as the fundamental unit of measurement for the data on a computer system. It is because bytes can be more often represented in larger multiples, such as Kilobytes, Megabytes, Gigabytes, Terabytes, and Petabytes. Bytes are stored digitally (such as disk, tape, etc.) to define the amount of data on storage.

The byte is a unit of digital information that most commonly consists of eight bits.Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable unit of memory in many computer architectures.To disambiguate arbitrarily sized bytes from the common 8-bit definition, network protocol …

Your code is nibble-based (4-bit) instead of byte-based (8-bit). It's taking a 32-bit value and reversing the order of the nibbles. I think you wanted 64-bit values done byte-based. Also, the shifts won't work since they shift, not rotate. So you'll lose bits "off the end".

The bit is the most basic unit of information in computing and digital communications.The name is a portmanteau of binary digit. The bit represents a logical state with one of two possible values.These values are most commonly represented as either " 1" or "0 ", but other representations such as true/false, yes/no, on/off, or +/− are also commonly used. ...

Word, bit and byte addressing. The memory model of an architecture is strongly influenced by the word size. In particular, the resolution of a memory address, that is, the smallest unit that can be designated by an address, has often been chosen to be the word. In this approach, the word-addressable machine approach, address values which differ ...

Apr 09, 2010 · Many assembly languages have instructions to rotate a bit into the carry flag and to rotate the carry flag into the word (or byte). The algorithm is: for each bit in the data type: rotate bit into carry flag rotate carry flag into destination. end-for