Calls to dos.h functions...

[Ramone]

When I put dos functions in my programs like "outportb()" ,"intx86()" or inportb(), my compiler gives the "call to undefined function" error even if I include dos.h... I tried with other compilers, with the same result... Only Turbo C++ 2.01 compiles correctly. Any ideas?

 

[2ffat]

What OS?
James P. Cottingham

When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute and it's longer than any hour. That's relativity.
[tab][tab]Albert Einstein explaining his Theory of Relativity to a group of journalists.

 

[Ramone]

My OS is Windows 2000 Pro and my compiler Borland C++ 5.0 But the weird thing is that I tried to install it on a Win98 pc and it does the same thing. I also tried other recent compilers and it does the same too. At the university, we have Win NT4 pc s with Borland C++ 4.5 and my program compiles perfectly... Also, I don't receive any error message from the compiler about the dos.h library, and the library itself seems okay, and the function declarations are here...

 

[2ffat]

The more recent compilers not longer allow the use of those functions since they aren't allowed in the newer Windows OS. See

http://bdn.borland.com/article/0,1410,21372,00.html

and

http://bdn.borland.com/article/0,1410,17844,00.html

for more info. The older compilers still include those functions but they may not work properly in the newer Windows versions. James P. Cottingham

When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute and it's longer than any hour. That's relativity.
[tab][tab]Albert Einstein explaining his Theory of Relativity to a group of journalists.

 

[Ramone]

Thanks a lot for the infos and the links! I knew that Borland might have removed some old functions in their new compiler... But since my program has to work under DOS, do you think that I can replace the dos.h file of C++ 5.0 by an older one from C++ 4.0? I know I could use an older compiler like Turbo C++, but personally I think that Borland C++ is a little more user friendly I think I will try this

 

[chrisdl]

If you are compiling to a Win32 App. (I think the latest compiler can only do this). You will not be able to access old DOS function calls. They are not available to ANY Win32 app.
-Chris (Consultant / Software Engineer)