Quiz submission record for quiz6-2-2 at Wed Jul 28 23:45:45 2004:

Your Answer for Question 1:
Exception program counter.It holds the address of offending instructions. The cause register records all possible exceptions in a clock cycle. MIPS commands that create overflow would access these instructions. 

Your Answer for Question 2:
It's associating the correct exception with the correct instruction in pipelined computers. Imprecise don't really tell you what instruction caused the offense.

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

Your Answer for Question 4:
Polling is periodically checking status bits. Memory mapped io means each register appears as a special memory location. I can't find any mention of how to actually poll stuff anywhere...I would imagine it would be something that read ssomething from a $input register and stores that in $v0.


Your unique submission ID is quiz6-2-2-cs61c-ah-1091083545-3130.