Question: Consider the page table for a system with 12-bit virtual and physical

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Question:

Consider the page table for a system with 12-bit virtual and physical addresses, and 256-byte pages. The list of free page frames is D, E, 8, F (that is. D is at the head of the free list. E is second, 8 is third, and F is last). Convert the following virtual addresses to their equivalent physical addresses in hexadecimal. All numbers are given in hexadecimal. (A dash for a page frame indicates the page is not in memory: i.e., the Valid/Invalid bit is set to Invalid). 8FF rightarrow 111 rightarrow 700 rightarrow BFF rightarrow Finally, show the resulting updates to the page table above after the preceding addresses are referenced causing some pages to be loaded.

Explanation / Answer

8FF = BFF

111 = 211

700 = D00

BFF = 5FF

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