Page 39 - demo
P. 39
A.1
A.0 A.2
0 0
A.5
1 1
2 2
B.0 B.1 B.2 B.3
3 3
4 4
5 5
6 6
A.7
7 User
A.9
8 program
B
9
A.8
10
User
program
A
B.5 B.6
Main Memory Disk
Main memory consists of a Secondary memory (disk) can
number of fixed-length frames, hold many fixed-length pages. A
each equal to the size of a page. user program consists of some
For a program to execute, some number of pages. Pages for all
or all of its pages must be in programs plus the operating system
main memory. are on disk, as are files.
Figure 2.9 Virtual Memory Concepts
