C/C++ REGS union in DOS.h no longer available. Any alternatives?
<p>I've had to use a very old library written some twenty years ago.  I get it to compile almost completely, except for one part that uses a REGS union.  From the Google searching I've done, REGS is a part of interrupt handling in the DOS.h file.  Well, looking at the modern version of DOS.h, one does not see any REGS definition.</p>

<p>Some posts around the Internet said something about it being unique to either the Borland or Turbo compilers, but this code was written to work under many different compilers.</p>

<p>Any ideas what I should do?  Is an old DOS.h file floating around that might work?</p>

<p>Using: Visual Studio 2010, compiling from command line.</p>
