From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C01BBCAC5B8 for ; Thu, 2 Oct 2025 14:56:34 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v4Khe-0005mq-LC; Thu, 02 Oct 2025 10:54:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1v4Khc-0005lc-Ad for qemu-devel@nongnu.org; Thu, 02 Oct 2025 10:54:40 -0400 Received: from lin1.islenet.com ([45.33.68.68]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1v4KhU-00087d-2q for qemu-devel@nongnu.org; Thu, 02 Oct 2025 10:54:39 -0400 Received: from localhost (localhost [IPv6:::1]) by lin1.islenet.com (Postfix) with ESMTP id 31BBBF5914 for ; Thu, 02 Oct 2025 10:54:22 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=islenet.com; h= mime-version:user-agent:content-transfer-encoding:content-type :content-type:references:in-reply-to:date:date:from:from:subject :subject:message-id:received:received; s=default; t=1759416862; x=1760280863; bh=7PRQ13fnVPgsqc9sv5pjCnZSNc56NIXeYcmvuSEAci0=; b= nhYlgsXuShGvBr0VCaN7ahTN2s1F1VNKS0GOcsffiG+GRkO0hpXFMBfNIkviHdpZ gkwkZ/zn4QNxne7qYojGY7yZClU+q+au0yuEBE/aHDtuu9YNKS/tfHQPaj6JiLkF +OGnw8tsviG+JKg0JB9yX31E9dmdluhCdP5/QkKUrWG8LpnmLaRkbkxBbzgGLobC KY64ldMugsQwhOzYZOSYGtzWEF/KahSCOU1rWgxKfCtc5yzzXof6YK/SqAeJ1BAw BoFLWGiBUsM5p3JgJ8/LxQ5dYDjd1uZQWnk1HsKjm3ZVCM3f6/nywnHMIp3Gkwdv ZgYjUWFTsh9i2P/jy167tg== X-Virus-Scanned: amavis at islenet.com Received: from lin1.islenet.com ([IPv6:::1]) by localhost (lin1.islenet.com [IPv6:::1]) (amavis, port 10026) with LMTP id 9FqfnuRHnUqd for ; Thu, 2 Oct 2025 10:54:22 -0400 (EDT) Received: from venus.islenet.com (unknown [IPv6:2601:985:300:a441::7]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lin1.islenet.com (Postfix) with ESMTPSA id DEFC3F5889 for ; Thu, 02 Oct 2025 10:54:21 -0400 (EDT) Message-ID: <30c9712977931c6c94e2bbcc63a99d5b8cff4c0b.camel@islenet.com> Subject: Re: DOS 6.22 with LIM 4.0 Expanded Memory From: "Daniel L. Srebnick" To: qemu-devel@nongnu.org Date: Thu, 02 Oct 2025 10:54:21 -0400 In-Reply-To: <69de1286-0750-47d1-bac6-26512a339018@linaro.org> References: <69de1286-0750-47d1-bac6-26512a339018@linaro.org> Content-Type: text/markdown; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2 (3.56.2-2.fc42) MIME-Version: 1.0 Received-SPF: pass client-ip=45.33.68.68; envelope-from=dan@islenet.com; helo=lin1.islenet.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org > Certainly I'm not the right person to ask about DOS and i386 machines, > but I'm curious: why 0xD800 (54k)? Shouldn't the EMS window be in the > 640K-1M range? D800 (used as the EMM386 frame parmameter) actually refers to D800:0000. S= o yes, the window is in the upper memory space.