From owner-freebsd-questions Tue Jul 22 13:28:54 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id NAA25637 for questions-outgoing; Tue, 22 Jul 1997 13:28:54 -0700 (PDT) Received: from xmission.xmission.com (softweyr@xmission.com [198.60.22.2]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id NAA25628 for ; Tue, 22 Jul 1997 13:28:45 -0700 (PDT) Received: (from softweyr@localhost) by xmission.xmission.com (8.8.5/8.7.5) id OAA14710 for questions@freebsd.org; Tue, 22 Jul 1997 14:28:23 -0600 (MDT) From: Wes Peters - Softweyr LLC Message-Id: <199707222028.OAA14710@xmission.xmission.com> Subject: Re: Real Mode or Protected Mode? To: questions@freebsd.org Date: Tue, 22 Jul 1997 14:28:22 -0600 (MDT) In-Reply-To: <33D463B6.47D9@barcode.co.il> from "Nadav Eiron" at Jul 22, 97 10:39:34 am X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk John T. Moss asked: > I was just wondering if FreeBSD ran in Real or Protected mode becuase > DOS runs in real and has to use EMS ect... To get out of the 1 meg limit > but UNIX varants use all memory. I was wondering if it ran in protected > mode all the time or just swaped in on out like DOS to access beyond one > meg. Nadav Eiron replied: % Like most modern OSs, FreeBSD uses only protected mode. To be more specific, both the OS and the user processes run in protected mode, using a flat 32-bit address space. The "virtual 386" is not used by FreeBSD for UNIX applications. -- "Where am I, and what am I doing in this handbasket?" Wes Peters Softweyr LLC http://www.xmission.com/~softweyr softweyr@xmission.com