Process A , stored in disk , consists of pages . At the time of execution of the process A, the operating system finds six free frames and loads the six pages of the process A into six frames.

These six frames need not be contiguous frames in main memory. The operating system maintains a page table for each process.

Within the program, each logical address consists of page number and a relative address within the page.

In case of simple partitioning, a logical address is the location of a word relative to the beginning of the program; the processor translates that into a physical address.

With paging, a logical address is a location of the word relative to the beginning of the page of the program, because the whole program is divided into several pages of equal length and the length of a page is same with the length of a page frame.

A logical address consists of page number and relative address within the page, the process uses the page table to produce the physical address which consists of frame number and relative address within the frame.

The Figure 3.22 shows the allocation of frames to a new process in the main memory. A page table is maintained for each process. This page table helps us to find the physical address in a frame which corresponds to a logical address within a process.