COMPUTER FUNDAMENTALS

Detailed explanation-1: -In computing, the instruction register (IR) or current instruction register (CIR) is the part of a CPU’s control unit that holds the instruction currently being executed or decoded.

Detailed explanation-2: -current instruction register (CIR)-holds the instruction that is currently being decoded and executed. accumulator (ACC) – holds the data being processed and the results of processing.

Detailed explanation-3: -The instruction register holds the instruction currently being executed. Registers related to fetching information from RAM, a collection of storage registers located on separate chips from the CPU: Memory buffer register (MBR), also known as memory data register (MDR)

Detailed explanation-4: -For this purpose, there is a special register in the CPU called the instruction counter. After each instruction is performed, the CPU automatically updates the instruction counter with the address of the next instruction to be performed.

Detailed explanation-5: -A processor register (CPU register) is one of a small set of data holding places that are part of the computer processor. A register may hold an instruction, a storage address, or any kind of data (such as a bit sequence or individual characters). Some instructions specify registers as part of the instruction.