What is the function of Registers in microcomputer system?

Answer 1

What is the function of Registers in microcomputer system?

Another Answer

The function of registers is the same in all computers. They are the fundamental binary interface between the internal and external structure of the CPU. All binary transactions between the CPU and its peripherals pass through registers. From the inside, they are the final periphery to the pins.

Answer 2

Registers are high-speed memory which is located inside of CPU and serves to keep temporary data. Usual RAM cannot work with such high speeds and usually is not used for internal CPU calculations.

Answer 3

There are 3 different types of registers:

1. Those involved in program sequencing, e.g. the "PC" register.

2. Those involved in address calculation of variable - "SP" and "B".

3. Those involved in arithmetic and logic operations, like "A" and "X"

Then there are some special registers and "flags".

The (1) is used by the instruction unit to identify and request the next instruction to load. The next instruction can be calculated based on a comparison "IF A > B JMP to End otherwise execute next."

The registers that is used in arithmetic and logical operations are kept in the CPU to make this run faster. There is no memory access needed to add the content of 2 register, making this a much faster operation than adding memory. So, other computers than the Intel designed, use more registers and can benefit from this.

The CPU will require 2 registers to be able to feed the two arguments to the ALU for evaluation, and obtain the result in one of the registers.

Answer 4

Registers hold small bits of information that the microprocessor may be using for a given task at any given time. Because of its small storage size and distance to the actual processor itself, it's extremely fast.