Table of Contents
- 1 What are two roles of register in the process?
- 2 What is the role of registers in instruction execution?
- 3 What is role of register memory?
- 4 What are registers and their role in the execution of instructions?
- 5 What is a register in a computer?
- 6 Which is special purpose register?
- 7 Why registers are used in microprocessors?
What are two roles of register in the process?
The registers in the CPU perform two roles: Control and status registers: These are used by the control unit to control the operation of the CPU and by privileged, operating system programs to control the execution of programs.
What is the role of registers in instruction execution?
An instruction register holds a machine instruction that is currently being executed. A variety of registers serve different functions in a central processing unit (CPU) – the function of the instruction register is to hold that currently queued instruction for use.
What is role of register memory?
Register memory is the smallest and fastest memory in a computer. It is not a part of the main memory and is located in the CPU in the form of registers, which are the smallest data holding elements. A register temporarily holds frequently used data, instructions, and memory address that are to be used by CPU.
What does a register represent?
registernoun. (computer science) memory device that is the part of computer memory that has a specific address and that is used to hold information of a specific kind.
What is general purpose register?
General purpose registers are used to store temporary data within the microprocessor. It is of 16 bits and is divided into two 8-bit registers BH and BL to also perform 8-bit instructions. It is used to store the value of the offset.
What are registers and their role in the execution of instructions?
3.2 Instruction register. This register holds the current instruction so that it can be decoded and input to the control and timing unit. Specifically, the instruction register holds the opcode which defines the type of instruction.
What is a register in a computer?
A processor register is a quickly accessible location available to a computer’s processor. Registers usually consist of a small amount of fast storage, although some registers have specific hardware functions, and may be read-only or write-only.
Which is special purpose register?
A Special Function Register (or Special Purpose Register, or simply Special Register) is a register within a microprocessor, which controls or monitors various aspects of the microprocessor’s function.
What are the four general purpose registers and their functions?
The four general purpose registers are the AX, BX, CX, and DX registers. AX – accumulator, and preferred for most operations. BX – base register, typically used to hold the address of a procedure or variable. CX – count register, typically used for looping.
What is the role of bus and registers in instruction execution?
The CPU decodes the instruction, and then executes it. The PC is really a counter and a register. It stores a binary word that is used as the address for accessing the instructions in a program. This register directly drives the address bus and the memory address decoder in RAM or ROM.
Why registers are used in microprocessors?
Registers are temporary storage locations inside the CPU that hold data and addresses. The register file is the component that contains all the general purpose registers of the microprocessor. A few CPUs also place special registers such as the PC and the status register in the register file.