Interrupts | 8086 Interrupts | Microprocessor & it's Application

TL;DR

An interrupt is a condition that temporarily halts the microprocessor to work on a different task and then returns to its previous task.

Transcript

hi my dear students today we will discuss about interrupts right so in the last class we discussed about some different programs that are related to the directives assembler directives that are related to the different types of instructions now we will go in detail about interrupts right this is comes under chapter three right so what is interrupt ... Read More

Key Insights

• 👻 Interrupts allow the microprocessor to temporarily halt its current task and work on a different task before returning to the main program.
• ✋ There are two types of interrupts: maskable and non-maskable, with the latter having higher priority.
• 🫷 When an interrupt occurs, the current instruction is completed, and the flag register and code segment value are pushed onto the stack.
• 🐕‍🦺 The interrupt service routine handles the interrupt and returns to the main program.
• 🍵 Interrupts can be prioritized and handled based on their urgency.
• 🐕‍🦺 The interrupt vector table is used to determine the memory location of the interrupt service routine.
• 🪛 Understanding the steps involved in executing an interrupt is crucial in programming interrupt-driven systems.

Questions & Answers

Q: What is an interrupt?

An interrupt is a condition that temporarily halts the microprocessor to work on a different task before returning to its previous task.

Q: What is the difference between a maskable interrupt and a non-maskable interrupt?

A maskable interrupt can be ignored and handled later, while a non-maskable interrupt requires immediate attention and interrupts the current program execution.

Q: What happens when an interrupt occurs?

When an interrupt occurs, the processor completes the current instruction, pushes the flag register and code segment value onto the stack, and executes the interrupt service routine.

Q: How are interrupts prioritized?

Non-maskable interrupts have the highest priority and must be attended to immediately, while maskable interrupts can be prioritized and handled at a later time.

Summary & Key Takeaways

• Interrupts are conditions that hold the microprocessor temporarily to work on a different task before returning to its previous task.

• Interrupts can be ignored (maskable interrupt) or require immediate attention (non-maskable interrupt).

• When an interrupt occurs, the processor completes the current instruction, pushes the flag register and code segment value onto the stack, and executes the interrupt service routine.