What is program counter stack pointer?
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.
Why program counter and stack pointer is 16 bit?
The stack pointer always contains a memory address (the location of the top of the stack). The program counter always contains a memory address (the location of the next machine instruction to fetch). So, both the program counter and the stack pointer must be 16 bits wide.
What is the difference between program counter and instruction register?
The program counter (PC) holds the address of the next instruction to be executed, while the instruction register (IR) holds the encoded instruction. Upon fetching the instruction, the program counter is incremented by one “address value” (to the location of the next instruction).
What does a program counter do?
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 true program counter?
A program counter is a register in a computer processor that contains the address (location) of the instruction being executed at the current time. As each instruction gets fetched, the program counter increases its stored value by 1.
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.
How wide is a program counter?
The program counter in the 8051 is 16 bits wide.
What is the size of program counter & stack pointer?
Assume that all registers, including Program Counter (PC) and Program Status Word (PSW), are of size 2 bytes. A stack in the main memory is implemented from memory location (0100)16 and it grows upward. The stack pointer (SP) points to the top element of the stack. The current value of SP is (016E)16.
How do you calculate stack size?
Count the number of complete strings, multiply by 8 (since “STACK—” is 8 bytes long), and you have the number of bytes of remaining stack space.
Why is program counter 16 bit?
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.
Where is stack used?
Stacks are used to implement functions, parsers, expression evaluation, and backtracking algorithms. A pile of books, a stack of dinner plates, a box of pringles potato chips can all be thought of examples of stacks.
What is stack explain?
A stack is a conceptual structure consisting of a set of homogeneous elements and is based on the principle of last in first out (LIFO). It is a commonly used abstract data type with two major operations, namely push and pop. The stack concept is used in programming and memory organization in computers.
Is empty in stack?
empty() is used to check if a stack is empty or not. This method requires no parameters. It returns true if the stack is empty and false if the stack is not empty.
How do you clear a stack?
clear() method is used to remove all the elements from a Stack. Using the clear() method only clears all the element from the Stack and does not delete the Stack. In other words, we can say that the clear() method is used to only empty an existing Stack.