From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ryan Underwood Subject: Re: Dos App hangs with DPMI / PIC problem Date: Wed, 8 Sep 2004 15:49:15 -0500 Sender: linux-msdos-owner@vger.kernel.org Message-ID: <20040908204915.GE4403@dbz.icequake.net> References: Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: anon permutation Cc: linux-msdos@vger.kernel.org On Wed, Sep 08, 2004 at 09:54:49AM +0000, anon permutation wrote: > > > I am wondering, since this hanging problem is related to dosemu's dpmi > implementation, is it possible for me to use another dpmi implementation? > Can I turn off dosemu's dpmi inside dosemu.conf and then run some other > dpmi inside autoexec.bat? > > Is this feasible? What other DPMI implementation is compatible with dosemu? No, that is not possible. DPMI server runs in protected mode, so it has to be part of dosemu and a server cannot be installed from the v86 task. It is the same reason why you can't use another 386 EMS manager under dosemu, because the EMS manager runs in protected mode in order to use the 386 paging unit. Also, usually DPMI servers that are not integrated into the EMS manager will use VCPI to enter protected mode, since the EMS manager is already running in protected mode and provides a VCPI interface in case another program wants protected mode. Using VCPI is unfortunately also impossible under dosemu, not a fault of dosemu but the fault/intent of VCPI design. -- Ryan Underwood,