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In SAP-1 (Simple Asynchronous Processor), instruction execution involves a series of steps. First, the instruction is fetched from memory using the Program Counter (PC), which points to the address of the next instruction. The fetched instruction is then decoded to determine the operation and the operands involved. Finally, the execution phase carries out the operation, which may involve reading from or writing to memory, updating registers, or performing arithmetic operations. This cycle is repeated for each instruction until the program completes.
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What is the difference between instruction registers and instruction pointer?
instruction register is used to store the next instruction to be executed. instruction pointer is used to store the address of the next instruction to be executed.
Role of instruction pointer in 8086?
Its role is to point to the next instruction to be executed in the CPU. It always points to the next instruction to be executed in the CPU
What happens when MUL CH instruction is executed?
MUL is not an 8085 instruction.
What instruction is executed by the x86-64 microprocessor?
it has an instruction set of a few hundred instructions.
What is the function of instruction register?
The Instruction Register (IR) stores the instruction currently being executed. In simple processors each instruction to be executed is loaded into the instruction register which holds it while it is decoded, prepared and ultimately executed.
What is the storage area that contains the address for the instruction that is being executed?
The storage area that contains the address for the instruction currently being executed is known as the Program Counter (PC). The Program Counter holds the memory address of the next instruction to be fetched and executed by the CPU. As each instruction is processed, the PC is updated to point to the subsequent instruction in the sequence. This mechanism is crucial for the sequential execution of programs.
What is the function of the program counter register?
The function of the program counter register is to hold the address of the instruction that is being executed and (later) to hold the address of the instruction that will be executed next.
How many bus cycles are required for an unconditional or a conditional jump instruction in 8086 microprocessor to be executed?
when conditional jump instruction is executed it has 10 m/c cycles bt when nt executed it has 7 m/c cycles....while unconditional jump instruction has 10 m/c cycles...
What do you mean by microprogram sequencing?
To get the next micro instruction to be executed.
What is a single instruction to the computer that is executed as soon as it is received?
input
What is CIR register?
The CIR (Current Instruction Register) is a crucial component of a computer's CPU that holds the instruction currently being executed. When an instruction is fetched from memory, it is placed in the CIR before being decoded and executed by the control unit. This allows the CPU to keep track of the instruction flow and manage execution efficiently. By storing the instruction temporarily, the CIR plays a key role in the instruction cycle of the CPU.
What fetches each instructions?
In a computer's CPU, the instruction fetch stage retrieves instructions from memory. The program counter (PC) holds the address of the next instruction to be executed, which is used to access memory. Once fetched, the instruction is then typically decoded and executed in subsequent stages of the instruction cycle. This process is essential for the sequential execution of programs.
