Answered Essay: 1-If a program has 471 bytes and will be loaded into page frames of 126 bytes each, assuming the job begins lo

1-If a program has 471 bytes and will be loaded into page frames of 126 bytes each, assuming the job begins loading at the first page (page 0) in memory and the instruction to be used is at byte 132, answer the following questions a. How many pages are needed to store the entire job? b. Compute the page number and the exact displacement for each of the byte addresses where the data is stored

1-If a program has 471 bytes and will be loaded into page frames of 126 bytes each, assuming the job begins loading at the first page (page 0) in memory and the instruction to be used is at byte 132, answer the following questions: a. How many pages are needed to store the entire job? b. Compute the page number and the exact displacement for each of the byte addresses where the data is stored

Expert Answer

 

Hi,
Given the total program is 471 bytes and each page is 126, so a is simple,
a. ceil(471/126)= ceil(3.73)= 4 that is 4 pages are required,
b. Now,
page numbering starts from zero and instruction to be used at byte 132. Hence, Page 0 contains 1 to 100 bytes Page 1 contains 101 to 200 bytes and so on,
since 4 pages are required, we need 2 bits to store page number
and 8 bit sto store the offset

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