Quiz submission record for quiz6-2-2 at Thu Jul 29 10:37:19 2004:

Your Answer for Question 1:
The EPC register holds the address of the affected instruction. The Cause register records the cause of the exception: undefined instruction = 0, and overflow = 1.

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

Your Answer for Question 3:
The principle drawback of polling is that it can waste a lot of processor time because processors are so much faster than I/O devices.

Your Answer for Question 4:
Memory mapped I/O is an I/O scheme in which portions of address space are assigned to I/O devices and reads and writes to those addresses are interpreted as commands to the I/O device.

Loop: la $t0, 0xffff0004
      lb $v0, 0($t0)
      beq $0, $0, Loop


Your unique submission ID is quiz6-2-2-cs61c-fz-1091122639-1688.