8. Interrupts

The 8th video in the series of getting started tutorials by FlingOS. The tutorials get you started with writing your own operating system by taking you through most of the fundamentals.

In this video we look at interrupts, the IDT and using the timer device. We also set up the keyboard interrupt.

The resources for this video are available in the "8. Interrupts" folder at:

This tutorial in detail:
- What are interrupts
- Why are interrupts used
- Interrupt Service Rountines (ISRs)
- Types of interrupt
- Interrupt Descriptors Table (IDT)
- Handling interrupts
- Interrupt Requests (IRQs)
- Programmable Interrupt Controller (PIC)
- Programmable Interval Timer (PIT)
- Configuring the timer IRQ
- Handling IRQs
- Timer and keyboard IRQs

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[DootLordtheDooty]

Really great getting this much insight into the fine details of interrupt. Great material for revision :)

[realursus]

Once again, awesome quality (material + presentation).

I’d amend your statement about Interrupt and Trap gates.
Main difference is: ”interrupts are automatically disabled upon entry and reenabled upon IRET which restores the saved EFLAGS.”