What does the program counter do in assembly?
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 the purpose of program counter PC )?
A register in the control unit of the CPU that is used to keep track of the address of the current or next instruction. Typically, the program counter is advanced to the next instruction, and then the current instruction is executed.
Which data is stored in program 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 the purpose of program counter in 8085 microprocessor?
Program Counter: This register is used to sequence the execution of the instructions. The function of the program counter is to point to the memory address from which the next byte is to be fetched.
Why is program counter a 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.
What does the Mar do?
In a computer, the memory address register (MAR) is the CPU register that either stores the memory address from which data will be fetched to the CPU, or the address to which data will be sent and stored. MAR holds the memory location of data that needs to be accessed.
What does a program counter contain?
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.
Why program counter is 16 bit register?
Why is the program counter in 8085 microprocessor 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.
Where is the program counter?
In a simple central processing unit (CPU), the PC is a digital counter (which is the origin of the term “program counter”) that may be one of several hardware registers. The instruction cycle begins with a fetch, in which the CPU places the value of the PC on the address bus to send it to the memory.
Why is program counter a 16 bit register?
