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@Shamrock

Yes infact, I believe I was getting confused between system calls and interrupts.

More specifically, where system call handling and exception handling meet, that is what portion of...

One more clarification,
From what i understand, there are a limited number of exceptions made available. But the no. of system calls is quite high,

If the dispatch table is indexed via the...

Hmm so as I understand it,

int 0x80 causes the change to the kernel mode.

here 0x80 is used to index the IDT to get the location of the ISR.

What does the ISR location usually contain?
...

Could this post be moved to the Unix for Dummies Q&A?

I recently went through Understanding the linux kernel, to get an idea of how system calls and interrupts function in an x86 based machine.

However, the level of detail has left me slightly...