From owner-freebsd-hackers Sun Oct 8 22:21:11 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id WAA24894 for hackers-outgoing; Sun, 8 Oct 1995 22:21:11 -0700 Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id WAA24887 for ; Sun, 8 Oct 1995 22:21:07 -0700 Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id GAA17577; Mon, 9 Oct 1995 06:21:05 +0100 Received: by sax.sax.de (8.6.11/8.6.12-s1) with UUCP id GAA28829; Mon, 9 Oct 1995 06:21:04 +0100 Received: (from j@localhost) by uriah.heep.sax.de (8.6.12/8.6.9) id CAA03191; Mon, 9 Oct 1995 02:54:39 +0100 From: J Wunsch Message-Id: <199510090154.CAA03191@uriah.heep.sax.de> Subject: Re: direct acces to the text screen memory To: didier@aida.org (Didier Derny) Date: Mon, 9 Oct 1995 02:54:39 +0100 (MET) Cc: freebsd-hackers@freebsd.org (FreeBSD hackers) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: from "Didier Derny" at Oct 8, 95 10:01:00 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 Content-Length: 591 Sender: owner-hackers@freebsd.org Precedence: bulk As Didier Derny wrote: > > ... but when the Commodore scroll the screen > the entire screen update becomes very slow since it rewrite the entire > screen. Why don't you scroll the screen then? > How can I map the text screen ? mmap(2). But only for the vty's. You lose on xterms and serial terminals. I guess at most 10 % of all applications run on vty's, so you can estimate the usage degree of your intented emulation. -- 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. ;-)