Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!pacbell!hoptoad!peora!cmpfen!bob
From: bob@cmpfen.UUCP (Bob Breum)
Newsgroups: comp.sys.atari.st
Subject: Re: That little black line
Message-ID: <208@cmpfen.UUCP>
Date: 9 May 89 11:49:31 GMT
References: <809@stag.UUCP>
Reply-To: bob@cmpfen.UUCP (Bob Breum)
Organization: Computer Fenestrations, Lake Monroe, Florida, USA
Lines: 24

In article <809@stag.UUCP> to_stdnet@stag.UUCP writes:
>From: stag!thelake!steve@bungia.mn.org (Steve Yelvington)
>Another question:
>I don't have a monochrome monitor, so I don't know the effect of using a
>solid (value of 7) GREEN to redraw the desk area. I've read that GEM maps
>all nonwhite values to black. Since the monochrome GEM Desktop is
>halftoned, I have to assume that either (a) GEM does not really map all
>nonwhite values to black, or (b) the Desktop checks to see if it's using a
>monochrome monitor, and if so, adjusts its background to a halftone.

When the GEM Desktop redraws the desktop background, it performs a fill
rectangle to do so.  When a monochrome monitor is attached, it uses a
50% fill pattern for this operation.  Interestingly, the original RAM-loaded
TOS also used a 50% fill with color systems, yielding a pleasant light green
background; unfortunately, when Atari released the TOS ROMs, they altered
this to a solid green fill color systems, which seems to please no one.



-- 
Computer Fenestrations						      Bob Breum
Post Office Box 151		{uiucuxc|hoptoad|petsd|ucf-cs}!peora!cmpfen!bob
Lake Monroe, FL 32747 USA
+1 407 322-3222						   "C is the new BASIC"