The Stack Pointer register will hold the address of the top location of the stack . And the program counter is a register always it will hold the address of the memory location from where the next instruction for execution will have to be fetched.
What is the program counter in a CPU?
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 does the stack pointer do?
A stack pointer is a small register that stores the address of the last program request in a stack . ... When a new data item is entered or “pushed” onto the top of a stack, the stack pointer increments to the next physical memory address, and the new item is copied to that address.
What is meant by program counter?
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 does program counter contain?
The program counter (sometimes called instruction pointer) is a special-purpose register that contains the memory address of the next instruction to be executed . Every instruction is fetched from external memory at the address in the program counter, and stored in the instruction register.
What is true program counter?
A. decides which program to run . counts the number of instructions that have been executed . contains the address of the next instruction to be executed.
Is cache a register?
Cache is a smaller and fastest memory component in the computer. Registers is a small amount of fast storage element into the processor . ... Cache memory is exactly a memory unit.
Why stack pointer is required?
The Stack Pointer (SP) register is used to indicate the location of the last item put onto the stack . When you PUT something ONTO the stack (PUSH onto the stack), the SP is decremented before the item is placed on the stack.
How do you initialize a stack pointer?
To set up the stack pointers, enter each mode with interrupts disabled, and assign the appropriate value to the stack pointer. The stack pointer value set up in the reset handler is automatically passed as a parameter to __user_initial_stackheap() by C library initialization code .
What is stack example?
There are many real-life examples of a stack. Consider an example of plates stacked over one another in the canteen . The plate which is at the top is the first one to be removed, i.e. the plate which has been placed at the bottommost position remains in the stack for the longest period of time.
How do you calculate program counters?
A program counter is one of the register used in computer architecture and os. It holds the address of next instruction to be executed. After instruction is executed, it will incremented by one,(PC =PC +1) moreover program counter will be point to the next instruction.
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.
How do you program a counter?
The program counter (PC) is a register that manages the memory address of the instruction to be executed next . The address specified by the PC will be + n (+1 for a 1-word instruction and +2 for a 2-word instruction) each time one instruction is executed.
What is example of program counter?
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.
Why program counter is 16 bit register?
The program counter acts as a pointer to the next instruction to be executed and always contains the 16-bit address of the memory location of next instruction . It is a 16 bit register as 8085 has 16 address lines.
How many types of registers are?
3. How many types of registers are? Explanation: There are 4 types of shift registers , viz., Serial-In/Serial-Out, Serial-In/Parallel-Out, Parallel-In/Serial-Out and Parallel-In/Parallel-Out.
