Virtual Page Table Simulation

This is another operation system simulation. For the virtual memory management.

PAGE SIZE = 16
MAX SECTORs AVAILABLE = 1000
MAX FRAMEs AVAILABE = 100
(defined in src/java/MemoryUtil.java)

Victim page selection algorithm: Least Frequently Used(LFU)

The program(Located in test/java/ManualTest.java) will:

1. Ask user for the page numbers of their single program.
2. Ask user for the frame numbers allocated to the program.
3. Randomly generate the program counter's number(known as logical address).
4. Look page table for the physical address. If not valid(the page not loaded into RAM yet), a page fault occurred, and set the time stamp to 1. If already there, increase the time stamp by 1.

Note that, there are also another JUnit5 tests available in test/java/MemoryUtilTest.java.