What Are Cpu Registers And What Are Its Types?
The central processing unit contains a number of memory locations which are individually addressable and reserved for specific purpose. These memory locations are called registers. Some of theses registers are accessible to the programmer while some others are for the exclusive use of CPU. This latter set of registers is used for storage, interpretation and execution of instructions and the intermediate results. Total number of these registers varies among different computers. Widely used microprocessors have got eighteen 32-bit data registers which are used for storing instructions and operand of various sizes. One of these seven are 32-bit general purpose registers. These registers are accessible to the programmer and are used for holding addresses or as index registers for indexed memory addressing. We describe below some important central processing registers. The first one is the program counter. This is 16-bit register. Its only function is to hold the memory address of the next
Registers are the group of flip flops. Flip flogs are the storage elements of storing one bit information. Register also have some combinational circuits that perform data processing tasks. Group of flip flops and gates form a registers. Simple registers consist of only flip flops. Registers are used to speed up the execution of computer programs. Different types of register are available in market. User visible registers, data registers, address registers, conditional registers, general purpose registers, floating point registers, accumulator, constant registers, vector registers, special purpose registers and control and status registers are different types of registers. User visible register are divided into to types data registers and address registers. Data registers is basically used to store data. Accumulator register is special data register. Address registers are used to hold memory registers. Index register used to store the index of memory address. Condition registers are us
