Date: Mon, 12 May 1997 18:16:14 +0100 From: Matthias Paul Subject: Re: Cirrus Logic Cards To: opendos AT delorie DOT com Reply-to: Matthias DOT Paul AT post DOT rwth-aachen DOT de Message-id: <81EE4B745C@reze-1.rz.rwth-aachen.de> Organization: Rechenzentrum RWTH Aachen Content-transfer-encoding: 7BIT Precedence: bulk On Sat, 10 May 1997, Bill Phillips wrote: > On the other hand, I have been having odd problems in WfWG 3.11 > involving the card, or its drivers. And I am running that on top > of OpenDOS, though I doubt that would have any effect (pretty > totally separate I/O systems, aren't they?). In fact, if anyone > has any tips re: Cirrus/Windows problems, I'd like to hear them. Developing the built-in screen-saver of our K3PLUS keyboard driver back in 1993-1994, Axel and I had some problem reports on Cirrus VGA cards. For our case, we tracked this down to a register incompatibility of these cards compared to the original IBM VGA and other clones. At present, I do not know all of the VGA bits by their forename any more, but at that time we had used one of the 'standard' VGA methods to blank a screen. After we used the EGA method on Cirrus cards, our problems disappeared. At least, these older Cirrus VGA adaptors are not fully VGA compatible at register level. Maybe I have dropped in some comments on Cirrus cards when I wrote the video card stuff of Wim Osterholt's PORTS.LST some years ago (see Ralf Brown's interrupt list for details), I'm not sure any more. Matthias -------------------------------------------------------------------- Snail mail: Matthias Paul, Ubierstrasse 28, D-50321 Bruehl, Germany New eMail : Web : URL: http://www.rhrz.uni-bonn.de/~uzs180/mpdokeng.html --------------------------------------------------------------------