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disscus solution of Assignment No. 03 of System Programming-CS609 Due Date: 28/Jan/2014

Graded Assignment


Please read the following instructions carefully before submitting assignment:


  • You will submit your assignment before or on due date on VU-LMS.
  • Assignment should be completed by your own efforts it should not be copied from internet, handouts or books.
  • You should submit your .doc File via assignment interface at VU-LMS.
  • Assignment sent via Email will not be replied and accepted in any case.
  • If the submitted assignment does not open or file is corrupt, it will not be marked.
  • You will submit solution only in document (.doc or .docx) File.




To understand the use of INT 13H and its services.



For any query about the assignment, contact at cs609@vu.edu.pk

Assignment Questions

A request before solving it:

Dear Student,

This is very easy assignment which requires only the implementation of a given program. This implementation will build your understanding of BIOS interrupt 13H routine more clearly. So, do not paste your solution from any kind of source. Just do and describe what happens and how you tackle the errors if any.


Question:                                                                                                                               Marks 20     


Implement the program of lecture number 27 by using the BORLANDC compiler. File path of this program should be at the root directory of D partition and the file name should be LBA.txt. After the implementation of this program you take a memory dump which shows the successive operation of this program.  Also describe the values of this dump to prove the successive operation and also describes the whole processes of your implementation within few lines.

At the end of this assignment, show the data of your text file “LBA.txt” after the execution of above program.

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Views: 13921


Replies to This Discussion

hira take this prog and save it then compile and run 

#include <dos.h>
#include <bios.h>
#include <stdlib.h>
#include <stdio.h>
struct DAP {
unsigned char size;
unsigned char reserved1;
unsigned char blocks;
unsigned char reserved2;
unsigned char far *buffer;
unsigned long int lbalod;
unsigned long int lbahid;
} dap;
char st[80];
unsigned char buf[512];
FILE *fptr ;
void main (void)
puts ("enter the lba low double word: ");
gets (st);
puts ("enter the lba high double word: ");
gets (st);
dap.buffer = (unsigned char far *)MK_FP(_DS,buf);

_SI=(unsigned int)&dap;
puts ("enter the path: ");
gets (st);
fptr = fopen(st,"wb");
fclose (fptr);


you are about to compelet:

just write like this and press enter:


nd also make sure that u chng BOIS seeting into USB 

sumaira tell me one thing...once we set the flash as our 1st boot. then  system boot from flash then how can you interact with window as you are not in the environment window......

sumaira shabbir    does your lba.txt showing any content using flash ?

..Error nahi ja raha.....kia .karon .....Path setting bhi theek hy..C drive mai hy

@kaneez fatima

u have written (  - parenthsis before stdlib  at line no 4.

write it as #include <stdlib.h>

path is correct

May Allah Bless u  B FOR FAZAL.........u r right .Jazak Allaho khaira wa Ahsanul jaza ......

Theek ho gya .....Age btao ab kia karon

read the last pages of discussion

best of luck!

stay blessed

last page kon sa hy wo bhi bta de kiu k jab tak discussion ho rahi hy .......last page ka pta nahi kon sa ho ga????????

enter value in lba low doubl word and high double word such as 



B FOR FAZAl plz guide me what to do???????


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