From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Olson Subject: RE: 768k XT? Date: Tue, 10 Jun 2003 18:54:18 -0700 (PDT) Sender: linux-8086-owner@vger.kernel.org Message-ID: <20030610185135.B98615@agora.rdrop.com> References: Mime-Version: 1.0 Return-path: In-Reply-To: List-Id: Content-Type: TEXT/PLAIN; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-8086@vger.kernel.org > > Has anyone ever run into this before? > > I've run into similar - in my case, a Kyoshui XT with 4x256k > mapped as 640k of normal RAM and 384k of EMS RAM (permanently > in the D0000-DFFFF address range. Interesting, it's nice to know that someone else thought of such a thing, and to know there there is always a chance. Is there any indication (durring the memory check or by any other method) that this memory is present? > Technically, it's possible that one of the 256k banks has one of > the address pins permanently tied either high or low, and thus > that the extra 128k isn't mapped anywhere as a result. Sure, that's actually what I suspect to be the case. > > Does anyone have any DOS utilities or ELKS utilities that > > would test for upper RAM even though the BIOS says it's > > not there? > > As far as RAM above 1M is concerned, the XT processors don't > support it. Sure, I'm just refering to the memory between 640k and 1M, if present. Dan