From: "Simone Navari" Newsgroups: comp.os.msdos.djgpp Subject: DMA use in a Windows Dos Box (pls help) Date: Wed, 26 Jun 2002 06:41:41 +0000 (UTC) Organization: Mailgate.ORG Server - http://www.Mailgate.ORG Lines: 16 Message-ID: <226f48f21bb08b3688f34385ce536c18.34818@mygate.mailgate.org> NNTP-Posting-Host: 217.172.200.101 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Trace: news.mailgate.org 1025072457 18829 217.172.200.101 (Wed Jun 26 08:41:42 2002) X-Complaints-To: abuse AT mailgate DOT org NNTP-Posting-Date: Wed, 26 Jun 2002 06:41:41 +0000 (UTC) Injector-Info: news.mailgate.org; posting-host=217.172.200.101; posting-account=34818; posting-date=1025072457 User-Agent: Mailgate Web Server X-URL: http://mygate.mailgate.org/mynews/comp/comp.os.msdos.djgpp/226f48f21bb08b3688f34385ce536c18.34818%40mygate.mailgate.org To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com I had to allocate a physical memory block to use it as a DMA buffer. Under plain DOS, no problem ! To do it I use XMS services to allocate and lock memory but if I try to do it in a Windows Dos Box, the operating system halts my software when it calls the XMS lock service. Why Windows don't allow me to do this operation ? I've heard that VDS services can solve the problem but I don't completely understand how use it and how it can solve my problem ! Any help will be apreciated.... Simone Navari. -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG