Table of Contents
- 1 What are the difference between a program counter and memory address register B accumulator and instruction register?
- 2 Why accumulator is called special purpose register?
- 3 How is accumulator register different from program counter?
- 4 What is accumulator register in computer architecture?
- 5 Which one of the following is known as the accumulator register?
What are the difference between a program counter and memory address register B accumulator and instruction register?
8 Answers. The difference is that the program counter points to the next instruction to be fetched / executed , whereas the memory address register points to a memory location where the program being run will fetch some data (not an instruction).
Why accumulator is called special purpose register?
The accumulator takes a value in, operates on it and puts the value out; it could be stored in short term memory, stored in longer term memory, written to an output port or other peripheral. What comes out of the accumulator is effectively the processors reason for existence which makes it pretty special.
Which computer architecture use more registers?
Modern CPU architectures tends to use more GPR so that register-to-register addressing can be used more, which is comparatively faster than other addressing modes.
What is the role of accumulator in one address machine?
In this type of CPU organization, the accumulator register is used implicitly for processing all instructions of a program and store the results into the accumulator. Due to this the CPU is known as One Address Machine.
How is accumulator register different from program counter?
The program counter is a register showing the current location in a set of instructions and the accumulator is where values are stored before and after computation.
What is accumulator register in computer architecture?
An accumulator is a register for short-term, intermediate storage of arithmetic and logic data in a computer’s CPU (central processing unit). The numerical value in the accumulator increases as each number is added, exactly as it happens in a simple desktop calculator (but much faster, of course).
What is the difference between accumulator and register?
It is a register that is similar to the general purpose register. It holds data or the results of an operation during the processing cycles. The accumulator can hold one of the two operands during any ALU operation. The accumulator is the only register that can perform the shift function that we discussed earlier.
What is the basic difference in between segment register and general purpose register?
Segments are specific areas clear in a program for containing data, code and stack. There are 3 main segments − Code Segment − It contains all the instructions to be executed. A 16-bit Code Segment register or CS register supplies the starting address of the code segment.
Which one of the following is known as the accumulator register?
Register A is quite often called as an Accumulator. An accumulator is a register for short-term, intermediate storage of arithmetic and logic data in a computer’s CPU (Central Processing Unit).