From:	yin tan cui <z2191317 AT student DOT unsw DOT edu DOT au>
Newsgroups:	comp.os.msdos.djgpp
Subject:	how to get a copy of video memory ?
Date:	Fri, 19 Dec 1997 13:03:02 +1000
Organization:	UNSW
Lines:	17
Message-ID:	<3499E3E6.5837@student.unsw.edu.au>
Reply-To:	z2191317 AT student DOT unsw DOT edu DOT au
NNTP-Posting-Host:	max214015.servers.unsw.edu.au
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I'm writing a program that uses these screen functions in "pc.h", such
as ScreenPutString() to print some colored strings to the screen. The
problem I'm having is that when the number of lines I printed exceeds
the max row number(eg: when I'm using a 80x25 dos window, 
       No. of lines printed > 25)

I guess I need to update the screen in this case. ie. use 
void ScreenUpdate(void *buf)
where buf should contain an exact replica of the video memory, including
the chars and their attributes.

Am I right ? and if so, How to get an exact replica of video memory ?
if I'm wrong, What should I do ?


Thank you very much for your help.
(please reply by mail to    z2191317 AT student DOT unsw DOT edu DOT au )

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