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Implement Simple Interrupt Handler for Timer or Keyboard

hard1/8

PrevProgram the 8259 PIC for Interrupt Management

Language

Compiler

2.0s Limit 256MB

Implementation

Implement a simple interrupt handler for timer or keyboard.

Requirements:

Create interrupt handler (ISR - Interrupt Service Routine)
Install handler in IVT (Interrupt Vector Table)
Handle timer interrupt (INT 8) or keyboard (INT 9)
Demonstrate interrupt counting or character display
Send EOI (End of Interrupt) to PIC
Save and restore registers
Use inline assembly or pure assembly
Include proper comments
Show understanding of interrupt mechanism

Why This Matters

The pusha/EOI/iret pattern you write here is the same shape every real-mode DOS TSR and early xv6-style teaching kernel uses to hook IRQ 0 and IRQ 1, and forgetting to send the 0x20 EOI byte to the PIC is a real bug that silently stops all further timer or keyboard interrupts from firing. This is the mechanism every preemptive OS scheduler ultimately rides on top of.

Hints

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Validation Suite

main.c

Workspace 1.0