Question: Section A.7 contains code for a very simple exception handler. One serious problem with this handler is that it disables interrupts for a long time.

Section A.7 contains code for a very simple exception handler. One serious problem with this handler is that it disables interrupts for a long time. This means that interrupts from a fast I/O device may be lost. Write a better exception handler that is interruptable and enables interrupts as quickly as possible.

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