CS 537 - Quiz #3

1. A bug has gotten into your hardware that causes a bit in the PFN field of 
one of the TLB entries to flip at random. What effect will this have on your
system, if any?

2. Assume a 15-bit virtual address, a 32-byte page, and a two-level page table.
The formats of the page directory entry (PDE) and page table entry (PTE) are 
the same: a valid bit followed by a 7-bit page frame number. The page directory
base register (PDBR) is set to decimal 73. Here are some pages you may need:

pg   6: 0a 1c 01 14 0b 1a 19 0a 0a 1a 0c 14 02 0c 1c 0c 15 04 0e 13 17 11 08 05 08 07 04 13 0f 1d 0f 1e
pg  73: a2 d2 97 96 d9 7f 87 b4 b7 f2 f4 82 bf 7f be 93 e8 9d 99 9e f1 7f 7f b0 d8 da eb b1 81 c3 c2 f6
pg 114: 7f 7f 7f 7f 82 7f 7f 7f 7f 7f 7f 7f 99 7f 7f 7f 7f 7f 7f 86 7f 7f 7f 7f 7f 7f 8f 7f 7f 7f 7f 7f

The first virtual address to translate is 0x1787. What happens when you try to 
load this virtual address? (If valid, what do you get back?)

The second virtual address to translate is 0x2665. What happens when you try to
load it? (If valid, what do you get back?)