modes of operation
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elias
modes of operation
is linux protected mdoe or v86 mode? wat are teh benefits of v86 mode if interrupts are disabled? i know the kbd needs an interrupt, as does the clock, but if there disabled in pmode, why use it at all?
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Slasher
Re:modes of operation
Hi,
you have it all wrong! interrupts are always present. it how hardware report their state to the cpu and also a way of calling system code!
what differs is the way they are handled, in real mode the interrupt vector table (IVT) holds a pointer in the form segment:offset to the interrupt service routine while in protected mode the interrupts are handle by the Interrupt Descriptor Table. the IVT has a fixed address while the IDT can be setup in any address. read the intel manuals.
you have it all wrong! interrupts are always present. it how hardware report their state to the cpu and also a way of calling system code!
what differs is the way they are handled, in real mode the interrupt vector table (IVT) holds a pointer in the form segment:offset to the interrupt service routine while in protected mode the interrupts are handle by the Interrupt Descriptor Table. the IVT has a fixed address while the IDT can be setup in any address. read the intel manuals.
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elias
Re:modes of operation
thanx. im currently reading the intel manuels, but this one question has jsut been bugging me for so long, and am too impatient to search for an answer in the docs. im still gonna read them, but thanx for answering it