Original Post
I am learning assembly, for the purpose of writing an OS. It''s going pretty well. My question is how does the interrupt controller find the interrupt vector table?
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Interrupts
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in protected mode (as far as i can remember) there exists an register that stores the location of the IDT (interrupt descriptor table). look for the LIDT instruction in this case. By the way, why is it in the Game Programming forum?
[edited by - VolkerG on October 30, 2002 5:35:06 PM]
[edited by - VolkerG on October 30, 2002 5:35:06 PM]
Hey man, your developing an OS, and dont know about this forum!? its really the best out there for OS dev, might want to check it out...
thanks for the help. Heres a question, when the comp starts in realmode, interrupts work. When I switch to PM, why do they not work. I would guess because I need to load that IDTR register, can anyone confirm that.
Interrupt Descriptor Table as opposed to an Interrupt Vector Table
The IVT only starts at 0 for <286''s For 386+ you have to set the special IDRT register (though one would hope out-of-the-box it''s initialized to zero).
The IVT only starts at 0 for <286''s For 386+ you have to set the special IDRT register (though one would hope out-of-the-box it''s initialized to zero).
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