Quiz submission record for quiz6-2-2 at Wed Jul 28 17:55:02 2004:

Your Answer for Question 1:
The EPC register holds the address of the affected instruction. The Cause register is used to record the cause of the exception that arises. These registers are part of the implementation of the exception system used in MIPS architecture. The MIPS instructions that access EPC and Cause undefined instruction or arithmetic overflow.

Your Answer for Question 2:
they are interrupts or exceptions in pipelined computers that are not associated with the exact instruction that was the cause of  the interrupt or exception.

Your Answer for Question 3:
It can waste a lot of processor time because processors are so much faster than I/O devices.

Your Answer for Question 4:
When the processor must be able to address the device and to supply one or more command words, it uses the method of memory-mapping. In memory-mapped I/O, portions of the address space are assigned to I/O devices.


Your unique submission ID is quiz6-2-2-cs61c-et-1091062502-3134.