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Started by H. Reza Zarafshar
Sun, 12 Oct 1986 18:16
unix pc 7300, extneded ram problems, help please!
Author: H. Reza Zarafshar
Date: Sun, 12 Oct 1986 18:16
Date: Sun, 12 Oct 1986 18:16
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I have one of those early 7300's with only 1/2 a meg. on the mother board. I also have a 1/2 a meg. on a ram card. After putting one of the combo cards and populating all of the empty sockets which is supposed one and a half meg's worth of space, the 7300 reports only 2 meg even though to my calculations it should report 2.5 meg. Is there anyway I can fix it? or am I a victim of an early version of the machine? Reza Zarafshar 312-979-5104 ihnp4!ihreza!reza0
Re: unix pc 7300, extneded ram problems, help please!
Author: Jonathan Clark
Date: Tue, 14 Oct 1986 20:21
Date: Tue, 14 Oct 1986 20:21
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In article <1396@ihlpl.UUCP> reza0@ihlpl.UUCP (H. Reza Zarafshar) wants to know why he has 1/2 MB on the motherboard, 1/2 MB on a RAM card, and 1 1/2 MB on a combo card and his unix pc only sees 2 MB. To the best of my knowledge, and contrary to what the manual says, you can only put one memory expansion card on a unix pc and have the system see it. The problem is not hardware, so I suppose that there is some hope that this limit might change in future, but personally I am not holding my breath. -- Jonathan Clark [NAC,attmail]!mtune!jhc My walk has become rather more silly lately.
Re: unix pc 7300, extneded ram problems, help please!
Author: Harvey S. Cohen
Date: Tue, 14 Oct 1986 23:31
Date: Tue, 14 Oct 1986 23:31
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>In article <1396@ihlpl.UUCP> reza0@ihlpl.UUCP (H. Reza Zarafshar) wants to >know why he has 1/2 MB on the motherboard, 1/2 MB on a RAM card, and 1 1/2 >MB on a combo card and his unix pc only sees 2 MB. >To the best of my knowledge, and contrary to what the manual says, you can >only put one memory expansion card on a unix pc and have the system see it. >The problem is not hardware, so I suppose that there is some hope that this >limit might change in future, but personally I am not holding my breath. I am writing this on a 7300 with .5MB on the motherboard and two .5MB RAM cards. It has worked under R2.0, 3.0, and 3.5 of UNIX. Harvey S. Cohen, mtuxo!hsc
Re: unix pc 7300, extneded ram problems, help please! - correction
Author: Jonathan Clark
Date: Wed, 15 Oct 1986 04:45
Date: Wed, 15 Oct 1986 04:45
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Following up to my article in article <2134@mtuxo.UUCP> hsc@mtuxo.UUCP (Harvey S. Cohen) points out that he has two 1/2MB memory boards and a 1/2MB motherboard and the system correctly sees 1 1/2 MB of memory contradicting what I wrote. The explanation is simple: a) I boobed and b) when I said "memory expansion cards" I meant to say that memory expansion cards don't count as memory expansion cards. Never mind, let me try again. You cannot mix combo card memory and memory expansion card memory and have the system see all of it. Unless you can put memory expansion cards in slot n and the combo card in slot m and fiddle it somehow (but I don't think so). There. Now somebody else can correct me. -- Jonathan Clark [NAC,attmail]!mtune!jhc My walk has become rather more silly lately.
Re: unix pc 7300, extneded ram problems, help please! - correction
Author: Spearman
Date: Wed, 15 Oct 1986 13:14
Date: Wed, 15 Oct 1986 13:14
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> You cannot mix combo card memory and memory expansion card memory and > have the system see all of it. Unless you can put memory expansion > cards in slot n and the combo card in slot m and fiddle it somehow > (but I don't think so). There. Now somebody else can correct me. Well, Jonathon, since you ask.. :-) I have both a combo card populated with 1 meg and a 512K ram board running in addition to my 512 on board, for a total of 2 meg. The problem with the original posting, I think, is that there is no configuration of possible slots, etc. which allow more than 2 meg of memory if you have only 512K on board. At least I could not find anything in the installation guide which would provide this. Steve Spearman ihnp4!ihop3!spear
Re: unix pc 7300, extneded ram problems, help please!
Author: Bamford
Date: Wed, 15 Oct 1986 18:41
Date: Wed, 15 Oct 1986 18:41
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> To the best of my knowledge, and contrary to what the manual says, you can > only put one memory expansion card on a unix pc and have the system see it. > -- > Jonathan Clark I have a pc7300 with 1/2 Meg motherboard. When I ordered it, I asked for 1 meg, so they sent me an additional 1/2 meg card. This works fine. Later, I got a combo RAM/EIA board, with another 1/2 meg. I installed this and the system DOES see 1 1/2 meg total. Perhaps there is something strange about the combo board as compared to a regular RAM board... On the other hand, perhaps there is some upper limit on the amount of RAM on expansion boards. -- Harold Bamford AT&T Bell Labs IE 2F-524 (312) 369-7397
Re: unix pc 7300, extneded ram problems, help please!
Author: Bob Hoffman
Date: Thu, 16 Oct 1986 03:35
Date: Thu, 16 Oct 1986 03:35
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I recently upgraded the memory on a PC7300 here. It started with 1/2mb
on the motherboard and 1/2mb on an add-on card. We bought a 2mb add-on
card, and it turned out that the 1/2mb card has to be removed first.
The configuration guide that comes with the 2mb card gives the various
possible configurations, and you cannot have any other RAM cards with
it. Therefore, the maximum memory you can have is 2mb plus whatever is
on your motherboard, which gives us 2.5mb.
--
Bob Hoffman, N3CVL {allegra, bellcore, cadre, idis, psuvax1}!pitt!hoffman
Pitt Computer Science hoffman%pitt@csnet-relay
Re: Re^n: unix pc 7300, CT mktg
Author: Jim Webb
Date: Sat, 18 Oct 1986 18:16
Date: Sat, 18 Oct 1986 18:16
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> An extra point about CT selling the unix pc - they may be able to (and > I have not read the contract) offer options for the unix pc which AT&T > does not. Now doesn't *that* sound intriguing? Just ducky :-), I can see it now, CT brings out a piece of hardware that the AT&T software doesn't know about, but the CT release does. I guess we can expect CT-UNIX 3.0.5.1.4... To quote Bill The Cat, ACKKKKK!!!!!!! -- Jim Webb "Out of phase--get help" ...!ihnp4!hropus!jrw "Use the Force, Read the Source"
Re^n: unix pc 7300, extneded ram problems
Author: Jonathan Clark
Date: Fri, 24 Oct 1986 05:30
Date: Fri, 24 Oct 1986 05:30
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Ok, well, since so many people have corrected me so many times on this, I think that I'm going to shut up and I now claim that I know nothing at all about the unix pc, much less this problem. :-) The trouble is that I know what in general terms what the problem is (and no I can't tell you), but I don't know enough about the rest of the hardware to make a definitive pronouncement. I just wish that I'd realized this before. Maybe I'll take apart the module and see. No, that would require thinking. Does anyone out there have a unix pc which correctly sees more than 1 1/2 MB of installed memory? If so, how much memory, in what combination, which slots and so on. Answers by mail, kudos to the winner. I'll summarize. Hardware hackers and people who have an expansion box full of 1/2 MB memory cards are excluded. An extra point about CT selling the unix pc - they may be able to (and I have not read the contract) offer options for the unix pc which AT&T does not. Now doesn't *that* sound intriguing? -- Jonathan Clark [NAC,attmail]!mtune!jhc My walk has become rather more silly lately.
Re: unix pc 7300, extneded ram problems, help please!
Author: Smith
Date: Fri, 24 Oct 1986 14:36
Date: Fri, 24 Oct 1986 14:36
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%% In article <1396@ihlpl.UUCP> reza0@ihlpl.UUCP (H. Reza Zarafshar) wants to %% know why he has 1/2 MB on the motherboard, 1/2 MB on a RAM card, and 1 1/2 %% MB on a combo card and his unix pc only sees 2 MB. % you can only put one memory expansion card on a unix pc and have the % system see it. Jonathan Clark [NAC,attmail]!mtune!jhc You can get the combo board and .5M board both to be recongised. It makes a diffrence which slots the bords are put in. If you look in the appendix of the installation guide it tells where to put them. (NOTE they number the slots diffrently then other people.) -jim colsmith -- J. S. Smith AT&T IW There are lots of opinions around this place, but these are mine and no one else's. ihnp4!ihu1e!jss
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