Date: Sun, 08 Feb 2009 15:16:48 +0100 From: Christoph Mallon <christoph.mallon@gmx.de> To: Oliver Fromme <olli@lurza.secnetix.de> Cc: freebsd-current@FreeBSD.ORG Subject: Re: CFT: Graphics support for /boot/loader Message-ID: <498EE950.300@gmx.de> In-Reply-To: <200902081247.n18ClJaM015821@lurza.secnetix.de> References: <200902081247.n18ClJaM015821@lurza.secnetix.de>
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Oliver Fromme schrieb: > Antonios Anastasiadis wrote: > > I've got the red border on a TFT monitor by the way. > > OK, yeah, the problem is more widespread than I thought. > Obviously some TFT monitors (probably wide-screen ones in > particular) aren't scaling VGA modes to the full size of > the screen, so the border bug becomes visible. This "bug" is called "overscan" and is actually a feature of graphics cards. The overscan colour index can be selected with the "Overscan Color" register (0x11) of the attribute controller (port 0x3C0). You can even set a colour which is outside of the 0-15 range, so you get a 17th colour for the border!
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