Problem 4 In this problem, you will write LC-3 assembly code to calculate some s

ID: 3817447 • Letter: P

Question

Problem 4

In this problem, you will write LC-3 assembly code to calculate some statistics about the

performance of 30 students in a class, based on their scores for an exam.

Assume that the scores of the 30 students are present in contiguous memory locations,

starting at 0x4000.

For each of the following, your program must implement subroutines. Failure to do so will

result in deduction of points even if you get the correct results.

1) Implement a subroutine MAX_SCORES to find the highest score obtained by a

student and store this value in the memory location 0x5000.

2) Implement a subroutine MIN_SCORES to find the lowest score obtained by a student

and store this value in the memory location 0x5001.

3) Implement a subroutine AVG_SCORES to calculate the average score of the class

and store this value in memory location 0x5002. If the average score is a fraction,

round it off to the next higher integer. For example, if the average turns out to be

30.22, the average should be rounded off to 31.

4) Implement a subroutine BELOW_AVG to calculate the number of students who have

scored below the class average (which has been rounded off), and store this value in

memory location 0x5003.

Your code should start at memory location 0x3000. You can assume there is no overflow

of integers at any step.

INCR LD R0, i ; get i

ADD R0, R0, #1; increment it

ST R0, i; save the new value

BR TEST; go back and test again

END; code after loop completes

STI R0, MAX_SCORES_0x5000; Store the value of R0 into mem[0x5000]

answer of 2):

INCR LD R0, i ; get i

ADD R0, R0, #1; increment it

ST R0, i; save the new value

BR TEST; go back and test again

END; code after loop completes

STI R0, MIN_SCORES_0x5001; Store the value of R0 into mem[0x5001]

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