This document discusses implementing multiprogramming by using virtual memory pages that map to physical memory pages through a page table. A process's virtual address space is mapped to physical pages using an address space class and page table to translate virtual addresses to physical addresses when reading from memory.

1. Implement
Multiprogramming

2. • virtualPage==physicalPage
• process virtual page physical
page
• table

3. • addrspace.h class AddrSpace static bool
usedPhyPage[NumPhysPages]; physical page

4. • Process page table Load
• page table
• virtual page table physical page table

5. • ReadAt virtual address physical
address
• pageTable[virtual address/page size].physicalPage + virtual address
physical page offset

6. •
• Done