16 bit logical address to 16 bit physical address

Question

I'm studying for finals. I am studying this question:

Convert the following 16-bit logical address into the 16-bit physical address given the 6-bit page number and 10-bit offset. Use the supplied process page table.

Logical Address 0000010111011110.

How do I calculate the physical address.

My professor gave us the answer = 0001100111011110 but I do not know how she calculate this.

Thanks.

Scott Hunter · Answer 1 · 2014-12-11T18:13:19.343

1

Take the top 6 bits, and use its value as an index into your process page table. In this case, the top 6 bits evaluate to 1, so you replace those bits with the value in entry 1: 000110.

edited Dec 11 '14 at 18:13

answered Dec 11 '14 at 18:06

Scott Hunter

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Yes but how do I map the first 6 bits: – SSI Dec 11 '14 at 18:10
This is the table : 0 00101 1 000110 2 011001. The correct answer seems to be to use not 1 000110 but I dont know why? – SSI Dec 11 '14 at 18:11
Without knowing what the "supplied process page table" is, I can't help you. – Scott Hunter Dec 11 '14 at 18:11
I just gave it to you – SSI Dec 11 '14 at 18:14

16 bit logical address to 16 bit physical address

1 Answers1