What is the difference between registers and memory?
Table of Contents
- 1 What is the difference between registers and memory?
- 2 What are the registers in 8086 microprocessor?
- 3 What is difference between register and cache memory?
- 4 What’s the difference between register and cache memory?
- 5 Why is memory segmentation done in 8086 microprocessor?
- 6 What is a register memory?
What is the difference between registers and memory?
Registers hold the operands or instruction that CPU is currently processing. Memory holds the instructions and the data that the currently executing program in CPU requires.
What are the registers in 8086 microprocessor?
The 8086 has eight more or less general 16-bit registers (including the stack pointer but excluding the instruction pointer, flag register and segment registers). Four of them, AX, BX, CX, DX, can also be accessed as twice as many 8-bit registers (see figure) while the other four, SI, DI, BP, SP, are 16-bit only.
What is the memory of 8086?
The 8086 was designed to address as much as 1MB of memory. Normally, a 16-bit processor is limited to 64KB of RAM; while the 8086’s 20-bit bus made 1MB possible, it still needed a way to address it with a 16-bit processor.
What is memory register in microprocessor?
In a computer, the memory address register (MAR) is the CPU register that either stores the memory address from which data will be fetched to the CPU, or the address to which data will be sent and stored. MAR holds the memory location of data that needs to be accessed.
What is difference between register and cache memory?
The cache needs to be much faster than main memory….Difference between Cache Memory and Register :
| S.No. | CACHE MEMORY | REGISTER |
|---|---|---|
| 1. | Cache is a smaller and fastest memory component in the computer. | Registers is a small amount of fast storage element into the processor. |
| 2. | Cache memory is exactly a memory unit. | It is located on the CPU. |
What’s the difference between register and cache memory?
A register holds instructions or data that the processor is working on or will be working on shortly. They form part of the processor and are capable of holding only one item at a time. A cache memory is an area in the computer where codes and instructions are stored.
What are the different types of registers in microprocessor?
In the 8086 Microprocessor, the registers are categorized into mainly four types:
- General Purpose Registers.
- Segment Registers.
- Pointers and Index Registers.
- Flag or Status Register.
Does microprocessor have memory?
There are two basic kinds of memory used in microprocessor systems – commonly called Read Only Memory and Read / Write Memory, but more usually called ROM and RAM – “Read Only Memory” and “Random Access Memory”. Storing these in ROM means they always available, even when the computer has only just been switched on.
Why is memory segmentation done in 8086 microprocessor?
It allows to processes to easily share data. It allows to extend the address ability of the processor, i.e. segmentation allows the use of 16 bit registers to give an addressing capability of 1 Megabytes. Without segmentation, it would require 20 bit registers.
What is a 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.
Why registers are used in CPU?
Registers are a type of computer memory used to quickly accept, store, and transfer data and instructions that are being used immediately by the CPU. The computer needs processor registers for manipulating data and a register for holding a memory address.