Path: utzoo!censor!geac!torsqnt!lethe!yunexus!ists!helios.physics.utoronto.ca!news-server.csri.toronto.edu!cs.utexas.edu!bcm!dimacs.rutgers.edu!aramis.rutgers.edu!remus.rutgers.edu!declan From: declan@remus.rutgers.edu (Declan McCullagh/LZ) Newsgroups: comp.sys.next Subject: Re: NeXTstation memory upgrade Message-ID: Date: 4 Feb 91 02:09:37 GMT References: <5062@media-lab.MEDIA.MIT.EDU> <1991Feb1.155824.5742@mck-csc.mckinsey.com> Organization: Rutgers Univ., New Brunswick, N.J. Lines: 89 In article <1991Feb1.155824.5742@mck-csc.mckinsey.com>, claman@mck-csc.mckinsey.com (Larry Claman) writes: > Actually, the closest NeXTAnswers comes is: > > --- > Q: What do I need to know about adding memory? > > A: [deleted] > > QA505 > --- > > This doesn't say how many memory banks are in the NeXTstation. You > are right about documentation - it is almost non-existent with my 105M > system. They didn't even give me man pages! I have ordered > the extended software kit to put on my server, but it isn't coming > till next month, so for now most of my knowledge is gained from > experimentation, NeXTAnswers, and from reading this group. Here's some information on memory configurations for NeXT computers: --- Q: What type of memory can my NeXT Computer use? Q: Can I install my own memory? Q: Should I purchase Parity Memory? A: All NeXTcube and NeXTstation products use industry standard SIMM style memory. New products support both non-parity SIMMs and parity SIMMs. Specifications are given below. Please note the following about adding RAM to your system before purchasing third party memory products: 1. NeXT does not support the addition of third party memory. 2. We cannot answer if a given manufacturer's memory product will work in your system. 3. Incorrect installation, incorrect parts or faulty parts can damage your CPU board. 4. Many SIMMs will work, few will fit. Low profile SIMMs are required in Cube based products. 5. An 040 system with mixed parity and non-parity memory installed cannot boot automatically, you must boot from the monitor (all memory will be treated as non-parity). 6. The information presented here is subject to change without notice. Memory Information for the NeXTstation product The following chart illustrates possible valid memory configurations for the NeXTstation product. Chart: Memory Configurations, NeXTstation Horizontal axis--number of 4MB SIMMs Vertical axis--number of 1MB SIMMs x = a configuration below the minimum required memory size 0 4 8 0 x 16MB 32MB 4 x 20MB 8 8MB Parity memory specifications for NeXTstation: 1Mx9 100ns SIMMs 4Mx9 100ns SIMMs The NeXTstation has 8 SIMM slots that can accommodate up to 32MB (Megabytes) of parity memory using eight 4Mx9 SIMMs. The minimum configuration is 8MB using 8 1Mx9 SIMMs. The specs are the same as those listed above for parity memory for the NeXTcube, however, low profile parts are not required. Non-parity memory specifications for NeXTstation: 1Mx8 100ns SIMMs 4Mx8 100ns SIMMs The NeXTstation has 8 SIMM slots that can accommodate up to 32MB (Megabytes) of memory using eight 4Mx8 SIMMs. The minimum configuration is 8MB using eight 1Mx8 SIMMs. The specs are the same as those listed above for parity memory for the NeXTcube, however, low profile parts are not required. --- Hope this helps... Declan McCullagh Independent NeXT Developer