Quiz submission record for quiz6-2-2 at Thu Jul 29 03:28:01 2004:

Your Answer for Question 1:
The EPC holds the address of the instruction that caused the exception. The Cause register records the cause of the exception. The instructions to access them are lwc0,mfc0,mtc0,and swc0.

Your Answer for Question 2:
An imprecise exception is when the correct exception is not always associated with the correct instruction in a pipelined computer.

Your Answer for Question 3:
The principal drawback of polling takes up more resources for higher bandwidth devices.

Your Answer for Question 4:
In memory-mapped io, portions of the address space are assigned to i/o devices. Reads and writes are interpreted as commands to the i/o device.

addi $t0 0xffff0000
loop:
lw $t1 0($t0)
rem $t2 $t1 2
beq $t2 $0 exit
lb $v0 7($t0)

exit:


Your unique submission ID is quiz6-2-2-cs61c-al-1091096881-2447.