What is general purpose register used for?

What is general purpose register used for?

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.

What is general purpose register and special purpose register?

As the name suggests, each special purpose register is designated for a purpose and that purpose alone. General purpose registers, on the other hand serve as scratchpad for software. They are used for passing parameters to functions, storing return values, and intermediate values during computations.

Why is it useful to have many general purpose registers in the CPU?

The role of registers in a processor architecture is to provide the fastest access to data. A compiler uses this idea to keep around the most needed data in the registers, while storing/retrieving the data from the main memory as needed. This is all that a compiler knows.

What are the main differences between the general purpose registers and special purpose?

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.

Why are special registers needed?

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. The diagram above shows that the CPU contains a number of registers in order to process data and to follow program instructions.

Which is type of general purpose register?

The general purpose registers are divided into two categories. Four registers, AX, BX, CX, and DX, are classified as data registers.

What is a special purpose register?

A Special Function Register (or Special Purpose Register, or simply Special Register) is a register within a microprocessor, which controls or monitors various aspects of the microprocessor’s function.

What are the functions of registers?

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 the three functions of register?

The register holds program counters, data, instructions, and addresses that the arithmetic logic unit is currently processing.

What are the three types of register?

These are classified as given below.

• Accumulator:
• Memory Address Registers (MAR):
• Memory Data Registers (MDR):
• General Purpose Registers:
• Program Counter (PC):
• Instruction Register (IR):

What are the types of register?

Different Types of Registers

• MAR Register. The full form of MAR is the memory address register.
• MDR. The full form of MDR register is a memory data register.
• MBR. The full form of MBR is the memory buffer register.
• PC. The full form of PC is the program counter register.
• Accumulator.
• Index Register.
• Instruction Register.

What are the types of counters?

Types of Counters

• Asynchronous Counters.
• Synchronous Counters.
• Asynchronous Decade Counters.
• Synchronous Decade Counters.
• Asynchronous Up-Down Counters.
• Synchronous Up-Down Counters.

What is the application of shift register?

Applications of shift Registers – The shift registers are used for temporary data storage. The shift registers are also used for data transfer and data manipulation. The serial-in serial-out and parallel-in parallel-out shift registers are used to produce time delay to digital circuits.

What do you mean by Johnson counter?

A Johnson counter is a modified ring counter in which the output from the last flip flop is inverted and fed back as an input to the first. It is also called as Inverse Feedback Counter or Twisted Ring Counter. The ring counter propagation delay is constant regardless of the number of bits in the code.

Why Johnson counter is used?

Applications of Johnson counter: Johnson counter is used as a synchronous decade counter or divider circuit. It is used in hardware logic design to create complicated Finite states machine. The 3 stage Johnson counter is used as a 3 phase square wave generator which produces 1200 phase shift.

What is the application of ring counter?

Applications of Ring counters Ring counters are used to count the data in a continuous loop. They are also used to detect the various numbers values or various patterns within a set of information, by connecting AND & OR logic gates to the ring counter circuits.