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Question by AJ: How can the CPU obtain the starting address of the appropriate interrupt service routine in each case?
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Since different devices are likely to require different interrupt service routines, how can the CPU obtain the starting address of the appropriate routine in each case ?
Best answer:
Answer by Gaytheist Buddha
The addresses of service routines are stored in low memory addresses. Get a hardware manual that describe the interrupt routine.
If my memory is accurate, I believe 8088 and 80186 chips store interrupts as 4-byte vectors beginning at address 0x0000. 32-bit and 64-bit chips will use larger vectors.
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