ICS 312 TA Homepage Fall 2009

General Information

Course Requirements

TBD

Homework Assignments

If you do not complete homework assignments sufficently, you would automatically fail the course. Otherwise, homework does not affect your grades. Homework submissions will be recorded and posted on this site using the student codes provided by the TA.

Please submit your homework assignments by 11:59 pm on the posted due date. Homework received on time will receive 10 points. One point will be deducted for late submissions. After one week homework will not be accepted.

To facilitate the grading process, please try to follow the following guidelines when submitting assignments.

1. Email submissions

   Assignments should be submitted via email using your UH UNIX email account. The TA will not accept any other form of submissions.

2. “To” field of email

   Assignments should be submitted to yucheng@hawaii.edu. Please do not send the assignments to the professor.

3. “Cc” field of e-mail

   Please cc the email to youself. That way, if the TA doesn’t get your email for some reason, you have proof that it was sent.

4. Subject of email

   Please use the following pattern for the subject of your email.

   [312] homework number

   For example: [312] homework 1

5. Body of email

   Please copy and paste the contents of the homework in the email body. That way, the TA will receive your work even if the attachment is rejected.

6. Attachments

   Plain text files are preferred. PDF, JPG, and PNG files are also accepted. Please do not send Microsoft Office documents.

7. Multiple submissions

   You may submit an assignment more than one time. Only the most recent assignment submitted will be evaluated.

Grades

The grades for homework assignments, programming projects, in-class quizzes, and the exams will be posted using the student codes provided by the TA. If you lose or forget your code, please contact the TA.

Click your student ID to view your grades.

Homework and Quiz Solutions

The solutions of some of the homework assignments and the in-class quizzes will be posted in this section. Since late submmisions are allowed, the solutions will not be available until a couple of weeks after the due date.

;; program2 -- This program asks the user how many numbers are to be added, and
;; input the user's response, which we will call n.  Now go into a loop which is
;; iterated n times, and in each iteration asks the user to enter a number.
;; Your program should add up all these numbers, using only a single ADD
;; instruction, and, finally output: The sum of the numbers enters is: followed
;; by the sum.

            .model         small
            .stack  100

            .data
prompt1     db      0ah,0dh,"Enter a number < 10: $"
prompt2     db      0ah, 0dh, "Your number: $"
result      db      0ah,0dh,"Sum of your numbers is: $"

        .code 
prog    proc
        mov         ax, @data
        mov         ds, ax

        lea         dx, prompt1     ; display prompt1.
        mov         ah, 9h
        int         21h

        mov         ah, 1h          ; obtain input from keyboard.
        int         21h

        sub         al, 30h         ; convert user input to a digit.
        mov         cl, al          ; mov to cl and use it as loop counter.
        mov         ch, 0           ; ch is used to store the sum.
startofloop:
        cmp         cl, 0           ; end loop if counter reaches 0.
        je          endofloop
        dec         cl              ; decrement loop counter.
        lea         dx, prompt2     ; display prompt2
        mov         ah, 9h
        int         21h
        mov         ah, 1h          ; obtain input from the keyboard
        int         21h
        sub         al, 30h         ; convert it to a digit.
        add         ch, al          ; add to ch.
        jmp         startofloop     ; loop again.
endofloop:
        add         ch, 30h         ; convert ch back to character.
        lea         dx, result      ; print out result message
        mov         ah, 9h
        int         21h
        mov         dl, ch          ; print out the character which is the sum
        mov         ah, 2h
        int         21h

        mov         al, 0           ; return code of 0
        mov         ah, 4ch         ; function code for exit to os
        int         21h
prog    endp
        end         prog

Links

• The course textbook — William Jones’ Assembly Language Programming for the IBM PC Family, 3^rd Edition