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I've looked through the code thouroughly; I can't seem to find anything else wrong with it. Although I'd recommend a good memzero'ing of the IDT.

Also, I just tested it in my code by commenting out most everything but what he's got: I get the same effect; Without handling it, it will simply triple fault and reset.

Yes blip is right it should occur infinitely and not result to double faults.

However I've found that the instruction "iret" on some assemblers will add a 16bit operand prefix when your in 32bit code (some do not). So try using "iretd" insted of "iret".

Heeyy. Thanks to everybody. I used "cli, hlt" command in isr0, and it isn't rebooting and it is running.

Wait for me Microsoft, I'm Coming.... ;D