- 1 What is program counter explain example?
- 2 What is program counter and what are its functions?
- 3 What is program counter in computer system architecture?
- 4 Where is the program counter in a computer?
- 5 What is the purpose of IP register?
- 6 What are general purpose registers?
- 7 What is the purpose of the program counter?
- 8 What is difference between RAM and ROM?
- 9 What is the difference between microprocessor and microcontroller?
- 10 What is the difference between Mar and MDR?
- 11 Why program counter is 16 bit register?
- 12 What is the size of program counter?
- 13 What is the stored program concept?
- 14 Is PC a register?
- 15 Is the zero address instruction?
What is program counter explain example?
A program counter is a register in the CPU containing the address of the next instruction to be executed from memory. For example, when your computer is turned on, a signal places the decimal number F000 into the CPU. This action tells the computer to look at the first instruction on the motherboards flash memory chip.
What is program counter and what are its functions?
The program counter, PC, is a special-purpose register that is used by the processor to hold the address of the next instruction to be executed. The PLA automatically updates the PC to point to the next instruction during the op-code decode cycle.
What is program counter in computer system architecture?
A program counter (PC) is a CPU register in the computer processor which has the address of the next instruction to be executed from memory. It is a digital counter needed for faster execution of tasks as well as for tracking the current execution point.
Where is the program counter in a computer?
The Program Counter, also known as the Instruction pointer, is a processor register that indicates the current address of the program being executed. Front panel of an IBM 701 computer introduced in 1952. Lights in the middle display the contents of various registers. The instruction counter is at the lower left.
What is the 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 are general purpose registers?
General purpose registers are used to store temporary data within the microprocessor. 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.
What is the purpose of the program counter?
The program counter stores the address of each instruction and tells the CPU in what order they should be carried out. When a program is being executed, the CPU performs the fetch-decode-execute cycle, which repeats over and over again until reaching the STOP instruction.
What is difference between RAM and ROM?
RAM, which stands for random access memory, and ROM, which stands for read-only memory, are both present in your computer. RAM is volatile memory that temporarily stores the files you are working on. ROM is non-volatile memory that permanently stores instructions for your computer.
What is the difference between microprocessor and microcontroller?
Microprocessor consists of only a Central Processing Unit, whereas Micro Controller contains a CPU, Memory, I/O all integrated into one chip. Microprocessor uses an external bus to interface to RAM, ROM, and other peripherals, on the other hand, Microcontroller uses an internal controlling bus.
What is the difference between Mar and MDR?
memory address register (MAR) – holds the address of the current instruction that is to be fetched from memory, or the address in memory to which data is to be transferred. memory data register (MDR) – holds the contents found at the address held in the MAR, or data which is to be transferred to primary memory.
Why program counter is 16 bit register?
Thus these registers are used to store the memory locations where the Program Counter and Stack pointers point to and as we discussed earlier address of a memory location is of 16 bit, so therefore these registers are of 16 bit so that they can store the 16 bit address as data in these registers.
What is the size of program counter?
The Program Counter is a special purpose Register that holds the address of the instruction being executed or of the next instruction to execute (this seems to depend on the architecture). Consequently it has the size of a machine word i.e. 32, 64 etc. bits.
What is the stored program concept?
Stored-program computer, a computer that stores instructions in its memory to enable it to perform a variety of tasks in sequence or intermittently. Presper Eckert, contributed to this idea, which enabled digital computers to become much more flexible and powerful.
Is PC a register?
The program counter (PC), commonly called the instruction pointer (IP) in Intel x86 and Itanium microprocessors, and sometimes called the instruction address register (IAR), the instruction counter, or just part of the instruction sequencer, is a processor register that indicates where a computer is in its program
Is the zero address instruction?
It may for example enable stack processing: a zero – address instruction implies that the absolute address of the operand is held in a special register that is automatically incremented (or decremented) to point to the location of the top of the stack.