Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!mips!apple!voder!nsc!amdahl!JUTS!duts!kls30 From: kls30@duts.ccc.amdahl.com (Kent L Shephard) Newsgroups: comp.sys.next Subject: Re: SIMM Message-ID: <1dBe02Xg08Vr01@JUTS.ccc.amdahl.com> Date: 4 Jun 91 15:09:09 GMT References: <1991May29.211017.409@cube.han.de> Sender: netnews@ccc.amdahl.com Reply-To: kls30@DUTS.ccc.amdahl.com (Kent L. Shephard) Distribution: na Organization: Amdahl Corporation, Sunnyvale CA Lines: 32 In article cnh5730@maraba.tamu.edu (Charles Herrick) writes: >In article <1991May29.211017.409@cube.han.de> martin@cube.han.de (Martin Ortlepp) writes: > my problem: > > I want to upgrade my cube to 16 mb. So I bought 8 SIMM's 70 ns 511000 (1x9). > Unfortunately the NeXT ROM Monitor said Exception #2 and that was all. > >The SIMMS RAM chips shipped in your machine are 1X8 (i.e. non-parity >RAM). >You can not mix (1X8) with (1X9). ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Wrong! I have 8 meg 1X8 and 4 meg 1X9. THe only requirement to mix 1X8 and 1X9 is that the 1X9 simms must be the first ones on the board and parity checking must be disabled. >The 70ns should work, but your RAM needs to be non-parity if you are >going to use the RAM NeXT put in your cube. I'm using IBM clone simms (1X9) and they do work. > >Bon chance, >-- Chuck -- /* -The opinions expressed are my own, not my employers. */ /* For I can only express my own opinions. */ /* */ /* Kent L. Shephard : email - kls30@DUTS.ccc.amdahl.com */