Principles of Processor Operations

Principles of
Processor
Operations

Introduction
• The processing unit carries out all instruction
set included in computer program (Fu 2018).
• The instruction set are performed by using
arithmetic, Input/output Operations, logic unit
as well as controlling unit.
• The ALU mainly performs logic operations as
well as arithmetic operations and includes
processor registers supplying operands
• The CPU are the microprocessor that are
integrated in a single IC.

Use of Different Processor Register
in Execute Cycle
There are different types of registers used in CPU for different purpose.
• Accumulator
• Memory Address Register
• Memory Buffer Register
• Memory Data Register
• Index Register
• Flag Register
• Program Counter

Functions of Interrupts Handlers
• Also known as Interrupt Service Routine is mainly run by
kernel for responding specific interrupt.
• Interrupt handlers are known as C functions that helps to
match a particular prototype and enables kernel for
passing the information of the handler in standard way
(Comer 2017).
• The interrupt handler can be executed at any time.