gessel@cs.swarthmore.edu (Daniel Mark Gessel) (09/13/90)
I can get a few 256k simms from some macs which had their memory upgraded.
I'm thinking about putting 8 of them in my 8 meg NeXT to get 10 meg.
Does anybody know if this will work?
Dan
--
Internet: gessel@cs.swarthmore.edu
UUCP: {bpa,cbmvax}!swatsun!gesseldorner@pequod.cso.uiuc.edu (Steve Dorner) (09/13/90)
In article <B89PWRJ@cs.swarthmore.edu> gessel@cs.swarthmore.edu (Daniel Mark Gessel) writes: >I can get a few 256k simms from some macs which had their memory upgraded. >I'm thinking about putting 8 of them in my 8 meg NeXT to get 10 meg. >Does anybody know if this will work? Well, I tried to give my NeXT 13M with four 256K SIMMS from my SE/30. These were rather unconventional SIMMS, and had "for SE/30 CPU only" stamped on them. Assuming that a SIMM was a SIMM and a stamp was a marketing ploy, I gave it a try. Pequod decided that the SIMMS were 1M SIMMS, and that they were in a world of hurt. After removing them, all was well. I don't know how normal SIMMS would work (the SE/30 SIMMS had only 2 chips on a 256K SIMM board). By the way, putting SIMMS in a NeXT is easy. Getting them back out is a whole different story. There must be a tool out there somewhere that I don't know about. -- Steve Dorner, U of Illinois Computing Services Office Internet: s-dorner@uiuc.edu UUCP: uunet!uiucuxc!uiuc.edu!s-dorner
grio@psuvax1.cs.psu.edu (Daniel L. Grillo) (09/13/90)
In article <B89PWRJ@cs.swarthmore.edu> gessel@cs.swarthmore.edu (Daniel Mark Gessel) writes: >I can get a few 256k simms from some macs which had their memory upgraded. >I'm thinking about putting 8 of them in my 8 meg NeXT to get 10 meg. >Does anybody know if this will work? > >Dan >-- >Internet: gessel@cs.swarthmore.edu >UUCP: {bpa,cbmvax}!swatsun!gessel With the same idea in mind, I asked NeXT this question a while back. The answer... |From Carlos_Salinas@NeXT.COM Tue Aug 14 13:29:34 1990 |To: grio@cs.psu.edu |Subject: Re: 256k SIMMS |Cc: cal_thixton@NeXT.COM | |Cal forwarded this question to us: | ||Cal- will 100ns 256k simms work in the current cube? ||Dan | |The answer is: |There are two kind of SIMM's: nibble and page mode. 256K nibble mode simm's |suppose to work, but not the page mode. However the industrial standard is |page mode (e.g. Apple SIMM's are page mode). Also I am not aware if anyone |in NeXT has ever tested out this support. | |Carlos Salinas |NeXT Technical Support -- Dan Grillo grio@cs.psu.edu *!psuvax1!grio
tilley@ccu.umanitoba.ca (09/14/90)
> By the way, putting SIMMS in a NeXT is easy. Getting them back out > is a whole different story. There must be a tool out there somewhere > that I don't know about. > -- > Steve Dorner, U of Illinois Computing Services Office > Internet: s-dorner@uiuc.edu UUCP: uunet!uiucuxc!uiuc.edu!s-dorner The NeXT tool does such a good job of this that I have wondered if the designers chose the screw size just for this reason. Prying up the outermost simm at an angle pushes the latch just the right amount.
cyliao@hardy.u.washington.edu (Chun-Yao Liao) (09/19/90)
In article <Fw9pxa02@cs.psu.edu> grio@psuvax1.cs.psu.edu (Daniel L. Grillo) writes: >||Cal- will 100ns 256k simms work in the current cube? >||Dan >| >|The answer is: >|There are two kind of SIMM's: nibble and page mode. 256K nibble mode simm's >|suppose to work, but not the page mode. However the industrial standard is >|page mode (e.g. Apple SIMM's are page mode). Also I am not aware if anyone >|in NeXT has ever tested out this support. >| >|Carlos Salinas >|NeXT Technical Support Funny, when I issue the "m" command under monitor, I got message like "... 4 megs RAM in page mode"... however, these are 1 meg simms. Can anybody explain more of these nibble mode/page mode? Thanx. cyliao@wam.umd.edu o NeXT : I put main frame power on two chips. @epsl.umd.edu o people: We put main flame power on two guys. @bagend.eng.umd.edu o :::::::::::::::::::::::::::::::::::::::::::: xxxxx@xxxxx.xxx.xxx (reserved) o RC + Apple // + Classic Music + NeXT = cyliao