Quiz submission record for quiz6-2-2 at Wed Jul 28 21:32:25 2004: Your Answer for Question 1: EPC register holds address of instruction associated with an exception. Cause register holds the cause of the exception. mfc0 and rfe accesses these registers. Your Answer for Question 2: Imprecise exceptions are reported without precise information about which instruction caused the exception. Your Answer for Question 3: Polling can take up a lot of (unnecessary) processor time. Your Answer for Question 4: Memory-mapped I/O means that portions of the address space are used to address the I/O devices. L: li $t0, ffff0004 lb $v0, 0($t0) j L Your unique submission ID is quiz6-2-2-cs61c-bb-1091075545-1346.