From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1O1zl3-0005lQ-Vc for qemu-devel@nongnu.org; Wed, 14 Apr 2010 06:23:46 -0400 Received: from [140.186.70.92] (port=39089 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1O1zl1-0005kS-LM for qemu-devel@nongnu.org; Wed, 14 Apr 2010 06:23:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1O1zkz-0004WQ-FA for qemu-devel@nongnu.org; Wed, 14 Apr 2010 06:23:42 -0400 Received: from mail2.shareable.org ([80.68.89.115]:34664) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1O1zkz-0004WI-AX for qemu-devel@nongnu.org; Wed, 14 Apr 2010 06:23:41 -0400 Date: Wed, 14 Apr 2010 11:23:34 +0100 From: Jamie Lokier Message-ID: <20100414102334.GA8693@shareable.org> References: <20100413232056.GA21321@shareable.org> <4BC57515.3030009@web.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4BC57515.3030009@web.de> Subject: [Qemu-devel] Re: Problem with DOS application and 286 DOS Extender application List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jan Kiszka Cc: Gerhard Wiesinger , qemu-devel@nongnu.org, Roy Tam Jan Kiszka wrote: > In some scenarios, we use QEMU in emulation mode for such a legacy guest > (16-bit protected mode), but we mostly run it in KVM mode these days. It > works fairly well under QEMU, but also we did not explore all corner cases. I'm glad too see it's alive and well then :-) > > Or it may be the "reset using keyboard controller and BIOS" method > > used to switch from protected mode to real mode on a 286 is not > > implemented properly, or is not supported by the BIOS properly. I mentioned that because of a discussion just a few months ago about a BIOS change which might have affected those transitions. Plus the default BIOS recently got changed from Bochs BIOS to SeaBIOS. -- Jamie