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From:	"Giorgio Medeot" <gmedeot AT yahoo DOT it>
Newsgroups:	comp.os.msdos.djgpp
Subject:	strange bright/blink behavior
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Message-ID:	<GrWcb.349526$lK4.11170457@twister1.libero.it>
Date:	Fri, 26 Sep 2003 12:39:02 GMT
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

Hi all.
I hope someone can help me with this code:

/***** foo.c *****/
#include <conio.h>
#include <pc.h>

int
main()
{
 unsigned char oldScreen;

 oldScreen = ScreenAttrib;
 ScreenAttrib |= 0x80; /* sets blink bit */
 putch('a');
 ScreenAttrib = oldScreen;
 return 0;
}
/*****************/

I compile with:   gcc foo.c -o foo.exe
My DJGPP installation includes gcc 1.3.1 and djdev203 June 2002 refresh.
OS is Windows 98 SE.

When I launch foo.exe, if the DOS prompt is located at the bottom of the
screen, so that executing foo.exe causes the screen to scroll, all new
lines that are printed also look as they had the blink bit set. Typing
'cls' at the
prompt restores the screen. I tried normvideo(), with no results.
I tried both executing foo.exe in plain DOS or in a Windows DOS box and
I saw the same behavior. What may be happening?

Regards, Jo.

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