HGC32.DLL - TDVIDEO library for Borland's TD32
            version 1.2 (c) Wojciech M. Zabolotny 29.01.1995

HGC32.DLL  is  the TDVIDEO  library for  Borland's 32-bit  Turbo Debugger
4.02,  which  allows  it to  debug 32-bit  DOS  programs on  systems with
single monochrome monitor driven by Hercules Graphics Board.
If you try  to use TD32.EXE on such  system without this library, results
will be probably disappointing - screen will become completely black.
To avoid this, just invoke Turbo Debugger using -vd  switch and HGC32.DLL
library:
               TD32 -vdHGC32.DLL program_name
(Don't place space between  "-vd" switch and DLL's name.  DLL's name must
be  given with  extension. HGC32.DLL must  be placed  in directory, where
TD32  is able to find it - for example  the same directory where TD32.EXE
is.)

In  this   case  everything  should  work   correctly.  To  obtain   most
satisfactory  results you  should use TD32INST  first, and  set "Mode for
Display"  option to "Black  and white".  Of course  you have to  run this
utility under Windows,  because in another case  you will see nothing  on
the screen.

                           WARRANTY DISCLAIMER

   Certainly I can not  give you any warranty that my library is  free of
errors. I  have tested that it works good on my computer, however I DON'T
TAKE ANY RESPONSIBILITY FOR  ANY DAMAGES OR OTHER PROBLEMS RESULTING FROM
RUNNING IT ON OTHER  COMPUTERS. This library  DOES NOT CHECK IF  HERCULES
CARD  IS PRESENT  IN YOUR  COMPUTER, so  if  you run  it on  the computer
without  Hercules, system will probably  crash (I am  not sure  if it can
cause any damage).

                           CONTENTS OF PACKAGE

LIST OF FILES:
 HGC32.DLL - ready to use binary form of the library
 HGC32.C   - C-language source of the library
 HGC32.DEF - module definition file
 HGC32.MAK - makefile for building of the library
 HGC32.IDE - BC++ 4.0 project file for the library
 HGC32.TXT - you are just reading it...
 BUILD.BAT - batch file for building of HGC32.DLL

 This package contains  source code for my  library, so if you want,  you
can introduce any changes.  To compile HGC32 you will  need BC++ (version
4.02 or higher) with Power Pack for DOS and Turbo Assembler.  If you have
no Turbo  Assembler, you can  try do replace parts  of source written  in
assembly language with C code.
 There is also project  file (HGC32.IDE) and  makefile (HGC32.MAK), which
I have used to build this library.
 Alternatively you can use BUILD.BAT  - batch file, which  should compile
and link HGC32.DLL
 Explanation of TDVIDEO library  structure you can find in the  help file
for Borland's TD32INST program, which is copyrighted by Borland so  I can
not include it here.

                           CONDITIONS FOR USE

 This package is  freeware, so you can modify  and use it in any way  you
want. However if  you utilize it in any  of your programs, please mention
it in  your documentation. If  you introduce any improvements,  or if you
find any errors, please notify me (WZAB@ipe.pw.edu.pl).

                         HISTORY OF THE PACKAGE:

14.01.1995 - version 1.0

22.01.1995 - version 1.1
     Fixed small bug in the procedure of detection of HGC's mode.

29.01.1995 - version 1.2
     Changed procedure of detection of HGC's mode.
     In  the  previous  version,  when  breakpoint  was  set  near  after
     "closegraph" or "restorecrtmode"  function call, graphics mode could
     be erroneously detected.

 Wojciech M. Zabolotny
 University of Electronics Fundamentals
 Warsaw University of Technology
 Nowowiejska 15/19
 00-665 Warsaw, Poland

 E-mail: WZAB@ipe.pw.edu.pl