Quiz submission record for quiz6-2-2 at Thu Jul 29 10:23:35 2004:

Your Answer for Question 1:
Excption Program Coutnter is the register in which address
of offending instruction(instruction cousing the exception) is saved.
Cause register is a status register, which holds a field that indicates the reason for the exception.
 MIPS uses :EPCWrite,CauseWrite,IntCause.



Your Answer for Question 2:
refers to association of correct exception with correct instruction in pipelined computers.
in computers that have imprecise interrupts, this requiremtent  in noncritical cases is relaxed.leaving it up to operating system to determine which instruction caused the problem.

Your Answer for Question 3:
Wasting a lot of  processor time because processors are 
much faster the I/O devices.

Your Answer for Question 4:
A program controls the terminal with 4 memory-mapped device registers. Memory-mapped means that each register 
appears as a special memory location.
lui $t0,0xffff0000 #receiver control address
ori $at,$at,0x0000
add  $t0,$at,$t0
andi  $t0,$t0,0x00000001 #checking for ready bit
slli  $t0,$t0,31
beqz   $t0,else
move  $v0,$a0
..
else: ...



Your unique submission ID is quiz6-2-2-cs61c-fx-1091121815-2884.