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Help with TSR

Posted on 1997-08-12
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Last Modified: 2010-04-16
I would like to know the steps required to create a TSR in turbo pascal.  I would like to be able to load a simple screen saver, or that type of program.
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Question by:noskillz
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kellyjj earned 400 total points
ID: 1215405
Turbo Pascal has a command called "keep"  This loads the program into memory at 33h (I don't remember exactly,  but it loads into the same you would have to if you using assembler]

here is a sample program that would print "K" in random locations.  NOTE:  I dont' think you can do this in a windows enviroment.  It must be dos.  Also the syntax might not be exactly on since I have writen in Pascal in a while.  I have been working on UNIX.

program test;
uses dos,crt;
var
x,y:integer;
begin  {main}
     randomize();
     repeat
        x=random(79)
        x=x+1;
        y=random(24);
        y=y+1;
        gotoxy(x,y);
        write("K"):  
     until (keypressed)

     keep(1);
end.

I hope this helps.  The one being passed to keep is the dos exit code telling dos this is a TSR. [double check this]   Mind you this is not a great example but it should get you going.
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Author Comment

by:noskillz
ID: 1215406
Thanks for the help.  I had ever heard of that command before.  I hope it works.  
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