From: "Peter S'heeren" Newsgroups: comp.os.msdos.djgpp Subject: Addressing physical memory Date: Thu, 18 Mar 1999 11:47:49 +0100 Organization: EUnet Belgium, Leuven, Belgium Lines: 19 Message-ID: <36F0D9D5.FA7B554A@pimc.be> NNTP-Posting-Host: 193.74.115.160 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 4.5 [en] (Win98; I) X-Accept-Language: en To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Hi I have a problem with accessing physical memory. I wanna do this: (1) allocate some physical memory pages (address isn't important, pages may be continguous), (2) determine their physical address, (3) pass these addresses to a bus-master capable PCI card that tries to read data from these addresses (experimental hardware). The precise address of the pages isn't important because the PCI card can access the entire 4GB physical memory space. The pages should be mapped in linear memory space and their contents should not be swapped away. Has someone faced this problem before and found a solution for it ? Peter S'heeren