X-Authentication-Warning: delorie.com: mail set sender to opendos-bounces using -f X-Recipient: opendos AT delorie DOT com From: "daSilva, Joe" X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.4325 Importance: normal Content-Class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Subject: RE: Specific Technical Questions Concerning DRDOS Date: Wed, 4 Feb 2009 11:03:12 +1100 Message-ID: In-reply-to: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Specific Technical Questions Concerning DRDOS thread-index: AcmGIGOZLS9XADA6SzSu54CMgZadNQAONW+A To: X-OriginalArrivalTime: 04 Feb 2009 00:03:13.0953 (UTC) FILETIME=[F94DA110:01C9865B] Reply-To: opendos AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: opendos AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk The key advantage of DR-DOS in achieving the maximum free conventional memory is the DPMS driver, which allows DPMS-aware drivers such as NWCDEX and NWCACHE (also, some builds of Netware, I believe) to load almost entirely into extended memory. With a bit of work, you can achieve over 100K extra free conventional memory compared to an equivalent MS-DOS configuration. DR-DOS also supports task switching and multi-tasking, although for me these weren't stable, unfortunately. However, the official releases of DR-DOS only support LBA and FAT32 using additional drivers, which totally negates the memory benefits of using DR-DOS. Udo's enhanced OpenDOS 7.01 provides native support of LBA and FAT32, so if you're interested in pursuing DR-DOS as your O/S, that's the way to go. As for W95, the original version (MS-DOS 7.0) did NOT support FAT32. I don't know if it supported LBA, but that point would be mute, anyway. It was W95A (MS-DOS 7.1) that introduced FAT32 support. Similarly for PC-DOS, version 7.0 and 2000 did not support FAT32 (nor I believe, LBA). Version 7.1, which doesn't seem to have been released as a stand-alone product, does support FAT32 and LBA. As for LFN support, the command processors of DR-DOS 7.02/7.02 (possibly also OpenDOS 7.01) will work with Henrik Haftmann's DOSLFN driver. However, Caldera never did implement this stuff properly, so deleting a file for example, can result in invalid LFN entries in the directory. MS-DOS 7.1's command processor also will work with Henrik Haftmann's DOSLFN driver. PC-DOS 7.1 however, won't (it probably supports LFN under Windoze but assumes there's no third-party LFN functionality avaliable, such as DOSLFN). Joe. >=20 Joe daSilva Senior Electronic Engineer Landis+Gyr Phone: +61 2 9690 7309 joe DOT dasilva AT landisgyr DOT com http://www.landisgyr.com/ Manage Energy Better -----Original Message----- > From: RiverWind [mailto:riverwind AT shellworld DOT net] > Sent: Wednesday, 4 February 2009 3:54 AM > To: Open Dos Discussion Group > Subject: Specific Technical Questions Concerning DRDOS >=20 >=20 >=20 > Greetings, >=20 > Well good people, I hate to impose upon you yet again. I have > downloaded a file called "drdos73.exe." I believe that when the > executable is run it will produce multiple installation disks for > DRDOS7.3. >=20 > Now then, I am interested in how I would go about tweaking memory > in order to hopefully surpass conventional memory or perhaps use it > more advantageously. You see, MSDOS has its "memmaker" and "emm386" > with which the machine's memory is maximized as much as possible. > Moreover, PCDOS put out by IBM has its "emm386" and also > "ramboost." Now ramboost is by far one of the best memory > management programs I've ever seen. However, it still seems > restricted to the confines of conventional memory. My question is > this. To what extent, if any, is DRDOS able to circumnavigate this > restriction? For that matter is such a thing even possible? >=20 > Lastly, does DRDOS provide any sort of multi-tasking facility which > would allow one to run more than one DOS application at the same > time, like say through a shell feature? Does DRDOS support long > file names? Lastly, what kind of tutorial documentation does it > come with? >=20 > Bright Blessings, > RiverWind >=20 >=20 PLEASE CONSIDER OUR ENVIRONMENT BEFORE PRINTING THIS EMAIL. This e-mail (including any attachments) is confidential and may be = legally privileged. If you are not an intended recipient or an = authorized representative of an intended recipient, you are prohibited = from using, copying or distributing the information in this e-mail or = its attachments. If you have received this e-mail in error, please = notify the sender immediately by return e-mail and delete all copies of = this message and any attachments. Thank you.