Is program counter a special purpose register?
As mentioned earlier, microprocessor fetches these instructions from the memory and executes them The program counter is a special purpose register which, at a given time,stores the address of the next instruction to be fetched. Program Counter acts as a pointer to the next instruction.
What are the special purpose registers of 8085?
The Special purpose registers are Accumulator (A), Flag Register, Instruction Register(IR), Program Counter (PC) and Stack Pointer (SP).
Which register is called special purpose register?
The flag register is a special purpose register and it is completely different from other registers in microprocessor. It consists of 8 bits and only 5 of them are useful.
Why are there special purpose registers?
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.
What are the 2 special purpose registers?
Special purpose registers ( SPR ) hold program state; they usually include the program counter (aka instruction pointer), stack pointer, and status register (aka processor status word).
Which is the appropriate special purpose register?
3 Answers. Special purposes register are, as the name implies, registers which are designed for just a task. For example, cs , ds , gs and the other segment registers fall into the special purpose registers, because they exist to hold segments’ number.
What is the main purpose of IP register?
A special-purpose register, usually called the instruction pointer (IP) or program counter (PC), keeps track of what instruction is being executed.
What is the function of register?
A register is basically a storage space for units of memory that are used to transfer data for immediate use by the CPU (Central Processing Unit) for data processing. Also known as memory registers, they can actually form part of the computer processor as a processor register.
What is difference between main memory and register?
The main difference between register and main memory is that a register is a small and fast storage inside the CPU that holds data temporarily while the main memory is a storage component in the computer that stores data and programs currently used by the CPU. A register is a high-speed memory location in the CPU.
How much memory does a register have?
Registers hold a small amount of data around 32 bits to 64 bits. The speed of a CPU depends on the number and size (no. of bits) of registers that are built into the CPU.