one million dollar question

This is a discussion on one million dollar question within the C Programming forums, part of the General Programming Boards category; hey guys! any of you here who knows how to program a TSR? everytime i try to think it out ...

  1. #1
    Registered User billholm's Avatar
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    Apr 2002
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    225

    one million dollar question

    hey guys!

    any of you here who knows how to program a TSR?

    everytime i try to think it out i get stuck. i just need a tiny bit of sample code (not a hint!) and i'll take it from there.

    thanx!

  2. #2
    Im a Capricorn vsriharsha's Avatar
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    Feb 2002
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    Cool

    This is a small TSR that u can use to go ahead... It gives u an idea of a tsr. (this is a tiny imitation of the "Dancing Dolls" ). I compiled it using Turbo C 2.0 +(or higher versions) and under DOS. Note: This TSR will NOT work under windows. It will only as long as u r in the DOS mode.

    Here it is...

    #include<dos.h>

    void interrupt our();
    void interrupt (*prev)();
    char far *scr=(char far *)0xB8000000L;

    main()
    {
    unsigned long int far *p;
    p=(char far *)36;
    prev=*p;
    *p=our;
    keep(0,500);
    }

    void interrupt our()
    {
    int i;
    for(i=0;i<=3999;i+=2)
    {
    if(*(scr+i)>='A' && *(scr+i)<='Z')
    *(scr+i)+=32;
    else
    if(*(scr+i)>='a' && *(scr+i)<='z')
    *(scr+i)-=32;
    }
    (*prev)();
    }


    - Hope u do well...

    NOTE: This will become resident in memory as soon as u execute it. To remove it from memory, u must reboot ur system (DOS).

    -Harsha.
    Help everyone you can

  3. #3
    Registered User billholm's Avatar
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    Apr 2002
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    225

    gogogo!

    Thanks a lot!

    I'm gonna try it out at home
    I'll ask for your help again sometime.

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