Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!usc!celia!neil
From: neil@celia.UUCP (Neil Richmond)
Newsgroups: comp.sys.amiga.hardware
Subject: Overscan and my tablet driver
Message-ID: <993@celia.UUCP>
Date: 19 Apr 91 16:22:18 GMT
References: <1991Apr12.135607.24556@wehi.dn.mu.oz> <1991Apr13.225922.5978@cc.helsinki.fi>
Reply-To: celia!neil@usc.edu (Neil Richmond)
Organization: Rhythm & Hues, Inc., Hollywood
Lines: 16


Can anyone tell me how the mouse deals with overscan? I am having some problems with my tablet driver and overscan. Basically, I cannot get the mouse pointer
to the edges of the screen. Should I scale the numbers so that they are outside
the system window parameters of 640 x 400? I read in the ROM kernal manuals 
that GFXBase Library contains these numbers and references these whenever doing
mouse operations. It seems that the system clips the mouse to the window. A
question, in overscan, is the left side of the screen's x coordinate less than
zero? When the mouse is at " zero " in x, it is not fully to the left side of
the screen. I am using IECLASS_POINTERPOS to position the pointer with the
tablet. I guess I need to know how overscan works. Is there any documentation?

neil
-- 
Only 3179 shopping days left till the next millenium! 
Neil F. Richmond         INTERNET: celia!neil@usc.edu
Rhythm & Hues Inc.       UUCP: ...{ames,hplabs}!lll-tis!celia!neil)