Quiz submission record for quiz6-2-2 at Thu Jul 29 04:10:43 2004:

Your Answer for Question 1:
The EPC is used to hole the address of the offending instruction.
Cause register is used to hold the field that indicates the reason of the exception.
the instruction lw is used to access EPC and cause because it is a 32 bits register

Your Answer for Question 2:
It is used to describe the situation that there is a mistake in associating the correct exception with the corresponding instruction

Your Answer for Question 3:
It will waste a lot of processor time, which can be used to execute other useful instructions.

Your Answer for Question 4:
memory-mapped io is one type of io system that reads and writes to the memory of the selected address.

la   $t1, 0xffff0000
la   $t2, 0xffff0004
li   $t4, 1
loop: lw  $t3, rcon
      beq $t3, $t1, read
      j   loop
read: 
      sb  $v0, 24($t2)
      j   loop 


Your unique submission ID is quiz6-2-2-cs61c-cg-1091099443-2648.