ICS 312 TA Homepage Fall 2009

General Information

TA:Jade Cheng  成玉  (yucheng@hawaii.edu)
Instructor:David Pager (pager@hawaii.edu)
Course:Machine-Level and Systems Programming
TA Office:POST Building Room 303-3 (cubicle 3)
TA Hours:Tuesday 11:00 to 12:00
Thursday 11:00 to 12:00

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.

hw-12-1.asm

;; Ex. 17.1 (b) on p.504.  Look for the index of the first entry  of 123 in B
;; array, and set di to this index.
        include pcmac.inc
        .model small
        .stack 100h

        .data
B       dw          1, 2, 3, 4, 5, 6, 123, 8, 9, 10
        .code
prog    proc
        extrn   putdec : near   ; compile with util.lib.
        extrn   getdec : near
        mov     ax, @data
        mov     ds, ax
        mov     es, ax          ; initialize es
        cld                     ; set df = 0
        lea     di, B           ; destination
        mov     cx, 10          ; loop the lenght of the string, here is 10.
again:
        mov     ax, 123         ; look for 123
        repne   scasw           ; scan until found or the end of cx
        jne     not_found       ; if scanning reaches the end, then not found
        mov     ax, 10          ; ax = 10
        sub     ax, cx          ; ax = 10 - current iteration = index
        mov     di, ax          ; set di = index
        jmp     done            ; once found, jump end
not_found:
        mov     di, -1          ; if not found, set di to -1
done:
        mov     ax, di          ; prints out the content of di.
        call    putdec

        mov         ah, 4ch     ; return code into ah
        int         21h         ; function code for exit to os

prog    endp
        end         prog

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