haugen@bulus3.BMA.COM (John M. Haugen) (10/16/90)
I know Interactive Unix does not support more than 16 megabytes of memory. Would there be other versions of Sys V based Unix that support more than 16 megabytes of memory? I believe the reason Interactive only supports 16 Meg is the DMA controller on ISA and MCA machines compatible with IBM only supports 24 bits of address. This causes their HPDD package to be limited to what the DMA can access. Does SCO, Everex, Intel, and the others also have this limit?? John M. Haugen Domain: haugen@BMA.COM Bull Micral of America UUCP: ...!uunet!bulus3!haugen 900 Long Lake Road ATT: 612-633-5660
grant@bluemoon.uucp (Grant DeLorean) (10/18/90)
haugen@bulus3.BMA.COM (John M. Haugen) writes: > I know Interactive Unix does not support more than 16 megabytes of memory. > Would there be other versions of Sys V based Unix that support more than > 16 megabytes of memory? I ws told by my rep at ISC (before the stuff about going through distributors came down) that they should have a release that will support more than 16 megs before the year is out (I was told it was for mid-November release when I was told about it back in August). I don't know if this helps, but ISC was working on it. --- Grant DeLorean ...osu-cis!n8emr!bluemoon!grant ...towers!bluemoon!grant grant@bluemoon ++Being self employed, my opinions are remarkably similar to my employers. "The couple that heaves together, cleaves together." --- Loiosh
linas@hparc0.HP.COM (Linas Petras) (10/18/90)
>Does SCO, Everex, Intel, and the others also have this limit??
SCO Unix 3.2.2 will support up to 64Mb of RAM I beleive
Linas Petras Not speaking for HP rogerk@sco.COM (Roger Knopf 5502) (10/20/90)
In article <728@bulus3.BMA.COM> haugen@bulus3.BMA.COM (John M. Haugen) writes: >I know Interactive Unix does not support more than 16 megabytes of memory. >Would there be other versions of Sys V based Unix that support more than >16 megabytes of memory? SCO Unix 3.2v2 supports up to 256mb of ram. -- Roger Knopf "Alas, poor Schoenberg; whose SCO Consulting Services aesthetic is perhaps too fine to be uunet!sco!rogerk or rogerk@sco.com caught in the gross colander of mass 408-425-7222 (voice) 408-458-4227 (fax) appreciation." --Karl P. Henning
james@bigtex.cactus.org (James Van Artsdalen) (10/20/90)
> haugen@bulus3.BMA.COM (John M. Haugen) writes: > I know Interactive Unix does not support more than 16 megabytes of memory. > Would there be other versions of Sys V based Unix that support more than > 16 megabytes of memory? Dell unix supports 64meg, at least on our platforms (425te and 433te are the marketing names). I am told by our unix guys that changes were made to get this to work. -- James R. Van Artsdalen james@bigtex.cactus.org "Live Free or Die" Dell Computer Co 9505 Arboretum Blvd Austin TX 78759 512-338-8789
palowoda@fiver (Bob Palowoda) (10/23/90)
From article <11202@scorn.sco.COM>, by rogerk@sco.COM (Roger Knopf 5502): > > In article <728@bulus3.BMA.COM> haugen@bulus3.BMA.COM (John M. Haugen) writes: >>I know Interactive Unix does not support more than 16 megabytes of memory. >>Would there be other versions of Sys V based Unix that support more than >>16 megabytes of memory? > > SCO Unix 3.2v2 supports up to 256mb of ram. Just out of curiosity who sells a 256mb ram card for a 386 machine? ---Bob -- Bob Palowoda palowoda@fiver | *Home of Fiver BBS* Home {sun}!ys2!fiver!palowoda | 415-623-8809 1200/2400 {pacbell}!indetech!fiver!palowoda | An XBBS System Work {sun,pyramid,decwrl}!megatest!palowoda| 415-623-8806 1200/2400/19.2k TB+
richardt@sco.COM (Richard Trivett) (10/23/90)
In article <728@bulus3.BMA.COM> haugen@bulus3.BMA.COM (John M. Haugen) writes: >Would there be other versions of Sys V based Unix that support more than >16 megabytes of memory? > Speaking from (but not for :-) ) SCO, SCO UNIX 3.2 v 2 recognizes up to 256 Meg of memory, but I understand only the first 64 Meg improves performance. - Rich
tima@bcs800.UUCP (Tim Addington) (10/23/90)
In <11202@scorn.sco.COM> rogerk@sco.COM (Roger Knopf 5502) writes: >SCO Unix 3.2v2 supports up to 256mb of ram. That's because it needs that much to run :-)
cpcahil@virtech.uucp (Conor P. Cahill) (10/23/90)
In article <1990Oct22.171226.6223@fiver> palowoda@fiver (Bob Palowoda) writes: > > Just out of curiosity who sells a 256mb ram card for a 386 machine? The biggest motherboards that I have heard of are 64MB and while they have been announced, they are very hard to come buy. There are a couple of system manufacturers that have complete systems with 64MB (Dell for one), but the motherboard manufacturers are having a hard time getting them out the door (mylex takes 30 to 40 days to send one out and micronics says they won't start shipping for at least 4 to 6 weeks). -- Conor P. Cahill (703)430-9247 Virtual Technologies, Inc., uunet!virtech!cpcahil 46030 Manekin Plaza, Suite 160 Sterling, VA 22170
chapman@sco.COM (Brian Chapman) (10/26/90)
grant@bluemoon.uucp (Grant DeLorean) writes: >haugen@bulus3.BMA.COM (John M. Haugen) writes: >> I know Interactive Unix does not support more than 16 megabytes of memory. >> Would there be other versions of Sys V based Unix that support more than >> 16 megabytes of memory? > I ws told by my rep at ISC (before the stuff about going through >distributors came down) that they should have a release that will >support more than 16 megs before the year is out (I was told it was >for mid-November release when I was told about it back in August). >I don't know if this helps, but ISC was working on it. SCO UNIX 3.2v2.0, which has been shiping for several months supports more than 16 Mb of physical memory. -- Brian Chapman uunet!sco!chapman Pay no attention to the man behind the curtain!
aland@informix.com (alan denney) (11/03/90)
In article <8420@scolex.sco.COM> chapman@sco.COM (Brian Chapman) writes: > >SCO UNIX 3.2v2.0, which has been shiping for several months >supports more than 16 Mb of physical memory. >-- >Brian Chapman uunet!sco!chapman >Pay no attention to the man behind the curtain! But how does the "man behind the curtain" handle the DMA issues when running > 16MB on ISA bus machines? This is a big issue for us... -- Alan Denney aland@informix.com {pyramid|uunet}!infmx!aland I'm Pro-Anarchy... and I Vote!
tyager@maxx.UUCP (Tom Yager) (11/04/90)
In article <728@bulus3.BMA.COM>, haugen@bulus3.BMA.COM (John M. Haugen) writes: > I know Interactive Unix does not support more than 16 megabytes of memory. > Would there be other versions of Sys V based Unix that support more than > 16 megabytes of memory? > > Does SCO, Everex, Intel, and the others also have this limit?? > John M. Haugen Domain: haugen@BMA.COM I'm running an Altos System 5000 (486/EISA) with 32MB of memory. It runs an Altos-modified version of SCO UNIX. I find nothing in the Interactive UNIX release notes about a 16MB limit, or about the lifting of such a limit. I have never run ISC on more than 16MB. I would hope that EISA and MCA support would include the ability to address more than 16 MB. (ty) -- +--Tom Yager, Technical Editor, BYTE----Freelance writer-------------------+ | UUCP: decvax!maxx!tyager NET: maxx!tyager@bytepb.byte.com | | "Get hipper...with flippers!" | +-------------Dr. Dude & Assoc.------I speak only for myself.--------------+
sauer@dell.dell.com (Charlie Sauer) (11/04/90)
In article <99@maxx.UUCP> tyager@maxx.UUCP (Tom Yager) writes: >In article <728@bulus3.BMA.COM>, haugen@bulus3.BMA.COM (John M. Haugen) writes: >> I know Interactive Unix does not support more than 16 megabytes of memory. >> Would there be other versions of Sys V based Unix that support more than >> 16 megabytes of memory? >> >> Does SCO, Everex, Intel, and the others also have this limit?? > >I'm running an Altos System 5000 (486/EISA) with 32MB of memory. It runs an >Altos-modified version of SCO UNIX. > >I find nothing in the Interactive UNIX release notes about a 16MB limit, or >about the lifting of such a limit. I have never run ISC on more than 16MB. > >I would hope that EISA and MCA support would include the ability to address >more than 16 MB. Dell V.3 is a superset of Interactive 2.0.2. Interactive 2.0.2 required a number of modifications to work with more than 16MB. Dell V.3 and Dell V.4 have both been tested up to 64MB with Dell 425TE and 433TE systems. -- Charlie Sauer Dell Computer Corp. !'s:uunet!dell!sauer (512) 343-3310 9505 Arboretum Blvd @'s:sauer@dell.com Austin, TX 78759-7299
lws@comm.wang.com (Lyle Seaman) (11/08/90)
In article <728@bulus3.BMA.COM>, haugen@bulus3.BMA.COM (John M. Haugen) writes: > I know Interactive Unix does not support more than 16 megabytes of memory. > Would there be other versions of Sys V based Unix that support more than > 16 megabytes of memory? > > Does SCO, Everex, Intel, and the others also have this limit?? I'm running a Wang-modified version of SCO UNIX on a Wang machine with 64 MB of memory. I don't know if stock SCO supports that much. -- Lyle Wang lws@comm.wang.com 508 967 2322 Lowell, MA, USA uunet!comm.wang.com!lws The scum always rises to the top.
stecz@hotwheel.dell.com (John Steczkowski) (11/10/90)
In article <1990Nov7.202702.269@comm.wang.com>, lws@comm.wang.com (Lyle Seaman) writes: > In article <728@bulus3.BMA.COM>, haugen@bulus3.BMA.COM (John M. Haugen) writes: > > I know Interactive Unix does not support more than 16 megabytes of memory. > > Would there be other versions of Sys V based Unix that support more than > > 16 megabytes of memory? > > > > Does SCO, Everex, Intel, and the others also have this limit?? > > I'm running a Wang-modified version of SCO UNIX on a Wang machine with > 64 MB of memory. I don't know if stock SCO supports that much. > Dell UNIX will support up to 64 meg. You have to make sure that the entry in /etc/default/at.386 is set up for > 16 meg. John Steczkowski Dell Unix Customer Support P#: (512) 343-3571 9505 Arboretum Blvd. !s: uunet!dell!hotwheel!stecz Austin, Texas 78759 @s: stecz@hotwheel.dell.com
evan@telly.on.ca (Evan Leibovitch) (11/10/90)
In article <728@bulus3.BMA.COM>, haugen@bulus3.BMA.COM (John M. Haugen) writes: > I know Interactive Unix does not support more than 16 megabytes of memory. > Would there be other versions of Sys V based Unix that support more than > 16 megabytes of memory? > > Does SCO, Everex, Intel, and the others also have this limit?? I recently installed Esix on two 486 EISA systems with 24 Meg each. At the start, the bootup BIOS showed that the hardware saw 24 Meg, but the ESIX bootup said it only recognized 16 of it. The first thing to check is the MEMRANGE value in /etc/default/boot. In my case, this alone did not help. Then, after asking around, I was told (tho' I'm not sure how true it is) that the original IBM spec for the old AT architecture did not deal with extended memory beyond 16 Meg. Therefore, there were technically ways in which manufacturers could play with that area without breaking the spec. So, the official line, as I understand it from both Interactive and Esix (and maybe others) is that "386 Unix *should* recognize normal extended memory beyond 16 Meg, but we won't support it because some manufacturers may implement that memory in strange ways." Indeed, after finding nothing in Unix that would get it to recognize beyond 16 Meg, I checked the box's hardware manual. The box had come shipped with hardware caching and "Shadow RAM" enabled - disabling both allowed the Esix to boot and recognize the entire 24 Meg. Not supported, maybe, but it worked! -- Evan Leibovitch, Sound Software, located in beautiful Brampton, Ontario evan@telly.on.ca / uunet!attcan!telly!evan / (416) 452-0504 ...quoth the Raven, "Eat My Shorts!" -- Bart
andy@xwkg.Icom.Com (Andrew H. Marrinson) (11/12/90)
There are some things to watch out for when going beyond 16Meg even if -- like the person running ESIX -- it seems to work. In particular, the AT bus DMA channels and all ISA-BUS cards support only 24-bit addresses. Now Unix since (at least) 3.2 has a mechanism to deal with this a file (mentioned in a previous posting) allows you to indicate which portions of memory support DMA and which don't. When a DMA would be performed to one of these addresses, a copy is performed instead. So end of problem, right? Wrong. Some drivers may not know about this scheme and blindly truncate the address to twenty-four bits or otherwise fail. In particular, third party DMA controllers such as Adaptec 1540 or WD7000 are more likely to suffer from this than others, since they won't be using the supplied dma library routines. This is a problem if you try to read or write raw partitions (e.g. with a DBMS) from a user program that could be located above 16Meg. I am not saying any particular OS/driver combination suffers from this problem, just that you should be aware of it and find out for your particular combination whether it works correctly or not. This may be the reason ISC and/or ESIX claim there OS's do not work with > 16 Meg. Just another reason why AT/ISA architecture is gimping our hardware... (Uh oh, stand by for flames on that one...) -- Andrew H. Marrinson Icom Systems, Inc. Wheeling, IL, USA (andy@icom.icom.com)