Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!doug.cae.wisc.edu!news From: plampani@dpls (Patrick Lampani) Newsgroups: comp.sys.next Subject: Re: Shouldn't 70 ns SIMMs work with '040?? (they don't for me, anyway) Message-ID: <1991Jun1.144934.4334@doug.cae.wisc.edu> Date: 1 Jun 91 19:49:34 GMT References: Lines: 21 In article cnh5730@maraba.tamu.edu (Charles Herrick) writes: > You can not mix (1X9) SIMMS with (1X8) SIMMS on a NeXT, even if > parity-checking is disabled. Replace your 70ns (1X9) with 70ns (1X8) > and try again. > -- Chuck I'm not very competent yet with all this hardware stuff........ BUT I'm typing this message on a machine that has mixed parity and non parity chips. So at least on a NextStation ROM 2.1 v59 (and later I'm told), you can mix them, although you have to boot from the monitor after getting a SYSTEM TEST FAILED message. You would, of course, loose the parity checking. I know that on the station, when you put in BIGGER SIMMS, you have to put them in the lower numbered slots and the smaller SIMMS in slots 4-7. Heck, maybe it's worth a try to put the new parity SIMMS in the lower numbered slots, At least it's one last experiment until Monday when you can call someone. -Patrick Lampani