CS401 Assignment No 4 Computer Architecture and Assembly Language Spring 2014

[vuassignments]

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CS401 Assignment No 4 Computer Architecture and Assembly Language Programming Spring 2014

1) You should concern recommended books to clarify your concepts as handouts are not sufficient.
2) You are supposed to submit your assignment in .doc format. Any other formats like scan images, PDF, zip, rar, bmp etc will not be accepted.


Assignment Statement:
Write a program in assembly language which uses BIOS interrupt INT 21 to read current system time and displays it on the top-left corner of the screen.

Following should be the output of your code:

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Hint: You can use “printnum” and “clrscr” subroutines given in example 6.3(handouts).

[vuassignments]

You can simply use the number printing program example 6.3 with minor modifications:

Use the BIOS INT 21 service described below

INT 21h / AH=2Ch - get system time;
return: CH = hour. CL = minute. DH = second. DL = 1/100 seconds.

Hour = 0-23, Min = 0-59, Sec = 0-59

Hint:

move 2Ch or 0x2C into AH register and invoke INT 21

next call the printnum subroutine 3 times

1 For hours

2 For minutes

3 For seconds

I hope this does the trick.

Best of luck