Path: utzoo!utgpu!water!watmath!clyde!feg
From: feg@clyde.ATT.COM (Forrest Gehrke)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Screen Border
Summary: 4 or 5 instructions does it
Message-ID: <31013@clyde.ATT.COM>
Date: 8 Aug 88 14:16:14 GMT
References: <2359@ur-tut.UUCP> <11297@iuvax.cs.indiana.edu>
Organization: AT&T Bell Labs, Whippany NJ
Lines: 23

In article <11297@iuvax.cs.indiana.edu>, bobmon@iuvax.cs.indiana.edu (RAMontante) writes:
> The Heath/Zenith Users Group magazine, REMark, gives an assembler
> program that controls the border color in its July 1988 issue.  (I'd
> type it in, but it's about four pages long and I'm tired.)
> -- 

For IBM and clones, using CGA, 4 or 5 instructions will produce
border color control of the screen.

By themselves it takes 5 (I haven't figured out why the  NOP
is needed).
     
mov  al,08      ; This value controls color.
mov  dx,03d9
out  dx,al
int  20h
nop

08 will give you a grey border.  04 will make it red. The colors 
are as found in the msdos manual under COLOR(TEXT) in the BASIC 
instructions.

    Forrest Gehrke