What is general purpose registers and special purpose registers?
We have discussed general purpose registers as being discrete memory locations within the CPU used to hold temporary data and instructions. A special purpose register is one that has a specific control or data handling task to carry out. There are a number of special purpose registers within the CPU.
What is the difference between general purpose register and special purpose register?
General purpose – These do not have side effects, can be used by most instructions. One can do arithmetic with them, use them for memory addresses, and so on. Special purpose – Registers which do not have side effects, but can only be used for certain purposes and only by certain instructions.
What is purpose of register?
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 registers used by the CPU are often termed as Processor registers.
What are general purpose register in 8085?
The 8085 has six general – purpose registers to store 8-bit data; these are identified as B, C, D, E, H and L as shown in the figure. They can be combined as register pairs – BC, DE, and HL – to perform some 16-bit operations.
What is the difference between special purpose and general purpose?
General purpose software is software that can be used for a variety of tasks. Special purpose software is software that can only be used for one particular task.
What is the difference between general purpose and special purpose?
A general purpose software application is software which has been designed to solve user’s common or general tasks using a computer system. Special purpose software applications are those which have been developed for a user for s task which is very specific to them.
What is the difference between special and general purpose?
A general purpose computer is used for different programs for different functions. It can be used to do a lot of things. A speical-purpose computer is designed for special functions only. It is usually made to do one thing only.
What are the general purpose registers in 8051?
The most widely used registers of the 8051 are A (accumulator), B, R0-R7, DPTR (data pointer), and PC (program counter). All these registers are of 8-bits, except DPTR and PC.
What is the purpose of registration of documents?
The main aim of document registration is to give validity and authenticity to a document. According to The Registration Act, 1908 some types of documents are mandatory to be registered and some of the documents are optional.
Which are general purpose registers?
General purpose registers are used to store temporary data within the microprocessor. BX – This is the base register. 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.
How many general purpose registers are there in 8051?
34 general-purpose
The 8051 contains 34 general-purpose, or working, registers. Two of these, registers A and B, comprise the mathematical core of the 8051 central processing unit (CPU). The other 32 are arranged as part of internal RAM in four banks, BO-B3, of eight registers each, named RO to R7.
What are two types of general purpose registers?
Second, there are two types of registers. Special purpose register. The general purpose register can store a data or a memory location address. Hence called as General purpose register. It First, a register is a flip flop circuit (in electronics language) which ‘temporarily’ holds data.
What are the general purpose registers in a microprocessor?
General purpose registers are used to store temporary data within the microprocessor. There are 8 general purpose registers in 8086 microprocessor. AX – This is the accumulator. It is of 16 bits and is divided into two 8-bit registers AH and AL to also perform 8-bit instructions.
How are operands and addresses stored in general purpose registers?
General purpose registers (GPR) are not used for storing any specific type of information. Instead operands as well as addresses are stored at the time of program execution. However the operand and the address information may not be of the same size. For example, in 8-bit microprocessors, the data is 8 bit whereas the address is 16 bit.
Which is the general purpose register R0 or R12?
R0 through R12 are general purpose, but some of the 16-bit Thumb ® instructions can only access R0 through R7 (low registers), whereas 32-bit Thumb-2 instructions can access all these registers. Special registers have predefined functions and can only be accessed by special register access instructions.