Computer Organization And Architecture: A Pedagogical Aspect

This section explores the concept of Interrupt Driven I/O in computer architecture, emphasizing its significance, operation, and design considerations.

Lecture – 34

The section discusses interrupt-driven I/O, its necessity, control signals, and design issues.

Interrupt Driven I/o

This section explains Interrupt Driven I/O, highlighting its importance in preventing CPU idle time during I/O operations.

Objectives Of The Unit

This section outlines the objectives of studying Interrupt Driven I/O, including understanding its necessity, control signals, and design issues.

Objective 1: Discuss The Need Of Interrupt Driven I/o Transfer

This section discusses the significance of interrupt-driven I/O in computer architecture, emphasizing its benefits over programmed I/O.

Objective 2: Specify The Control Signal Needed For Interrupt Driven I/o Transfer

This section outlines the control signals necessary for an interrupt-driven I/O transfer, emphasizing their significance in improving system efficiency.

Objective 3: Explain The Design Issues Of Interrupt Driven I/o Transfer

This section discusses the design issues associated with interrupt-driven I/O transfer, emphasizing the advantages of eliminating busy waiting and optimizing CPU efficiency.

Advantages Of Interrupt Driven I/o

Interrupt Driven I/O eliminates busy waiting by allowing the CPU to perform other tasks while waiting for I/O operations to complete.

Eliminating Busy Waiting

This section discusses the shift from programmed I/O to interrupt-driven I/O, emphasizing the elimination of busy waiting.

Basic Operations Of Interrupt Driven I/o

This section covers the operations and design issues of interrupt-driven I/O, highlighting its advantages over programmed I/O.

Cpu Issues Read Command

This section introduces interrupt-driven I/O operations in CPU architecture, emphasizing how it enhances efficiency by eliminating busy waiting.

I/o Module Interrupts Cpu

This section discusses the concept of interrupt-driven I/O, illustrating its significance in CPU efficiency by eliminating busy waiting.

Actions From Cpu Viewpoint

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.

Instruction Cycle And Checking For Interrupts

This section introduces the concept of interrupt driven I/O, highlighting its significance in eliminating CPU busy waiting during I/O operations.

Interrupt Service Routine

This section explains the concept of interrupt service routines (ISRs) in interrupt-driven I/O, detailing their role in managing CPU operations and I/O communications.

Context Switching During Interrupts

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.

Saving Processor Context

This section discusses the concept of saving processor context in interrupt-driven I/O operations, highlighting the significance of context switching.

Restoring Processor Context

This section discusses the mechanisms and steps involved in restoring processor context during interrupt processing.

Instruction Cycle State Diagram

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.

State Flow During Instruction Execution

This section covers the operation and benefits of interrupt-driven I/O in computer instruction execution, highlighting the transition from programmed I/O to the interrupt-driven model.

Handling Interrupts During Execution

This section discusses the interrupt driven I/O mechanism, emphasizing its advantages over programmed I/O and outlining the steps for handling interrupts during program execution.

Similarities Between Interrupts And Subroutine Calls

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.

Comparison Of Interrupt Handling And Subroutine Calls

This section compares interrupt handling to subroutine calls, outlining their operational similarities and differences in managing processor states and execution flow.

Program Status Word

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.

Description Of Program Status Word Bits

This section delves into interrupt driven I/O operations and their implications for CPU efficiency and system responsiveness.