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26. Lecture – 34
This chapter elaborates on the concept of interrupt-driven I/O in computer organization, detailing its necessity over programmed I/O. It explains the sequence of events that occur during interrupt processing, emphasizing the importance of context switching, interrupt service routines, and the handling of processor states during interruptions. The chapter concludes with a focus on the advantages of interrupt-driven systems in enhancing CPU efficiency and reducing idle time.
Sections
This section explores the concept of Interrupt Driven I/O in computer architecture, emphasizing its significance, operation, and design considerations.
The section discusses interrupt-driven I/O, its necessity, control signals, and design issues.
This section outlines the objectives of studying Interrupt Driven I/O, including understanding its necessity, control signals, and design issues.
Interrupt Driven I/O eliminates busy waiting by allowing the CPU to perform other tasks while waiting for I/O operations to complete.
This section covers the operations and design issues of interrupt-driven I/O, highlighting its advantages over programmed I/O.
This section focuses on the actions taken by the CPU during interrupt-driven I/O operations, highlighting the significance of context switching and processing interrupts efficiently.
This section covers the concept of context switching during interrupts in interrupt-driven I/O systems, detailing the process and significance of efficiently handling processor states during I/O operations.
The Instruction Cycle State Diagram outlines the steps involved in processing instructions in computer architecture, particularly focusing on the importance of interrupts in I/O operations.
This section explores the similarities between interrupt-driven I/O mechanisms and subroutine calls, focusing on how both processes temporarily suspend the main execution flow to service another routine.
This section discusses the significance and functioning of the program status word (PSW) in managing interrupts and context switching within interrupt-driven I/O systems.
Interrupt-driven I/O significantly reduces CPU busy waiting, allowing the processor to perform other tasks while waiting for I/O operations to complete.
Effective handling of interrupts necessitates the preservation and restoration of processor context using a system stack.
The interaction between hardware and software in interrupt processing provides a balanced approach to manage system resources efficiently.
Interruptdriven I/O
A method of input/output processing that allows the CPU to perform other tasks while waiting for I/O operations to complete, initiated by an interrupt signal.
Context Switching
The process of saving the state of a CPU so that it can be restored and execution resumed from the same point later.
Interrupt Service Routine (ISR)
A special block of code that is executed in response to an interrupt, responsible for handling the interrupt and performing necessary data transfers.
Program Status Word (PSW)
A word containing the status information of the currently running program, including result flags and control information.
Practice Exercises
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting