From owner-freebsd-hackers Sun Dec 24 01:38:43 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id BAA16088 for hackers-outgoing; Sun, 24 Dec 1995 01:38:43 -0800 (PST) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id BAA16070 for ; Sun, 24 Dec 1995 01:38:34 -0800 (PST) Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id KAA09953 for ; Sun, 24 Dec 1995 10:38:30 +0100 Received: by sax.sax.de (8.6.11/8.6.12-s1) with UUCP id KAA08334 for freebsd-hackers@freebsd.org; Sun, 24 Dec 1995 10:38:29 +0100 Received: (from j@localhost) by uriah.heep.sax.de (8.6.12/8.6.9) id JAA29798 for freebsd-hackers@freebsd.org; Sun, 24 Dec 1995 09:43:54 +0100 From: J Wunsch Message-Id: <199512240843.JAA29798@uriah.heep.sax.de> Subject: Re: How to write in physical memory ? To: freebsd-hackers@freebsd.org (FreeBSD hackers) Date: Sun, 24 Dec 1995 09:43:54 +0100 (MET) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <199512232004.VAA10304@labinfo.iet.unipi.it> from "Luigi Rizzo" at Dec 23, 95 09:04:42 pm X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL23] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-hackers@freebsd.org Precedence: bulk As Luigi Rizzo wrote: > > what is the simplest way for a user process to access a portion of > the physical memory on a system ? More specifically, I would like to > peek/poke into the video memory of my S3 card. I didn't follow the technical discussion in the XFree86 beta list too closely, but it seems to me that you've got an application that could benefit from the upcoming DGA server extension. (It's currently in the beta stages.) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)