Date: Sun, 3 Sep 1995 08:47:57 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: "douglas.rhodes" <dougr AT aloft DOT att DOT com>
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: demo problems and books


On Fri, 1 Sep 1995, douglas.rhodes wrote:

> I'm having problems running the grtask demo.  It seems to compile and link
> OK but when I run it, the screen just goes blank.  What am I doign wrong?
> The hello demo and sort demo work fine.

What VGA card do you have installed and what does your GO32 environment 
variable says?  The problem might be that you are using a graphics driver 
which is incompatible with your VGA.  This is explained in the DJGPP FAQ 
list (available as faq102.zip from the same place you get DJGPP):

10.3  Q: When I run graphics test program which came with DJGPP, my screen
         is all messed.
      A: You should put the name of the graphics driver which corresponds
         to your graphics card into the GO32 environment variable.  Get
         the file cbgrdXXX.zip and find the driver suitable for your card,
         then put its full path into GO32, like this:

                 set GO32=driver c:/djgpp/drivers/atipro.grd

If this doesn't work for you, read the following sections in the FAQ.