Why the program counter in 8085 microprocessor is a 16 bit register?
The program counter acts as a pointer to the next instruction to be executed and always contains the 16-bit address of the memory location of next instruction. It is a 16 bit register as 8085 has 16 address lines.
Why the size of data register is 16 bit in basic computer?
PC/IP (Program Counter / Instruction Pointer, 12 bits) holds memory address of current/next instruction to be executed. DR (Data Register, 16 bits) is used to contain a second operand for dyadic operations such as add, sub, and, or. TR (Temporary Register, 16 bits) is an extra register for storing data or addresses.
Is 16 bit A register?
Also, 16-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size. Since 216 is 65,536, a processor with 16-bit memory addresses can directly access 64 KB (65,536 bytes) of byte-addressable memory.
Why are 4 bits called a nibble?
The four bits in a nibble allow it to have 16 possible values, which is the same as one hexadecimal digit. Therefore, a nybble is sometimes referred to as a “hex digit.” In data communications, nybbles are sometimes called “quadbits,” because of the four bits that make up each nybble.
What is the highest 16 bit number in binary?
65,536
What are 2 bytes called?
Byte Halfword
What is a group of 16 bits?
In computing, a hextet is a sixteen-bit aggregation, or four nibbles. As a nibble typically is notated in hexadecimal format, a hextet consists of 4 hexadecimal digits.
What do you call 8 bytes?
8 bits: octet, commonly also called byte.
Is 8 bits a 64 bit byte?
Computer are designed to operate with an expected number of bits. Two bytes together as in a 16 bit machine make up a word , 32 bit machines are 4 bytes which is a double word and 64 bit machines are 8 bytes which is a quad word.
Why do bytes have 8 bits?
Originally Answered: Why is 1 byte=8 BITS? The size of the byte is a compromise between two factors: The lesser the number of bits in a byte, the easier it is to design & develop the hardware for each of the basic operations. The more the number of bits in a byte, more is the data capacity of the Byte.
Why do computers use base 8?
Octal was an ideal abbreviation of binary for these machines because their word size is divisible by three (each octal digit represents three binary digits). So two, four, eight or twelve digits could concisely display an entire machine word.
How many GB is a Exabyte?
1073741824
Are there always 8 bits in a byte?
The byte is a unit of digital information that most commonly consists of eight bits. The first bit is number 0, making the eighth bit number 7. The size of the byte has historically been hardware-dependent and no definitive standards existed that mandated the size. Sizes from 1 to 48 bits have been used.
What is the biggest byte?
As of 2018, the yottabyte (1 septillion bytes) was the largest approved standard size of storage by the System of Units (SI). For context, there are 1,000 terabytes in a petabyte, 1,000 petabytes in an exabyte, 1,000 exabytes in a zettabyte and 1,000 zettabytes in a yottabyte.
What are the bytes in order from smallest to largest?
Computer Storage Units Smallest to Largest
- Bit is an eighth of a byte*
- Byte: 1 Byte.
- Kilobyte: 1 thousand or, 1,000 bytes.
- Megabyte: 1 million, or 1,000,000 bytes.
- Gigabyte: 1 billion, or 1,000,000,000 bytes.
- Terabyte: 1 trillion, or 1,000,000,000,0000 bytes.
- Petabye: 1 quadrillion, or 1,000,000,000,000,000 bytes.