Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!midway!clout!chinet!miroc!reaper!mmm From: mmm@reaper.Chi.IL.US (Michael Marvin Morrison) Newsgroups: comp.sys.amiga.hardware Subject: Re: SIMM Modules Message-ID: Date: 16 May 91 11:41:19 GMT References: <1701@giaea.gi.oz> <1098@zds-oem.UUCP> Lines: 44 In article <1098@zds-oem.UUCP> easton@zds-oem.UUCP (Jeff Easton) writes: >In article mmm@reaper.Chi.IL.US (Michael Marvin Morrison) writes: >>In article <1701@giaea.gi.oz> s9133283@giaea.gi.oz (Noel Ashford) writes: >> [...] >>The 1Mx9 chips are generally for IBM type systems that require a Parity chip in >>their RAM setup. The Amiga doesn't use these, and I would suspect that the >>modules would simply not fit in slots made for 1Mx8's. At any rate, I would >>suggest that you return them for the proper 1Mx8 module. > > Bzzt. Wrong Answer but thanks for playing. > > The x8 SIMM's are pinned identical to the x9 SIMM's, with the exception >that the x8 SIMM's have a couple of pins marked No Connect that are used >for the Parity RAM on the x9's. Check you local TI data book for more info. Well, I checked my local MOTOROLA data book, and you are absolutely correct. I didn't bother checking the book at the time because I don't generally make a habit of using the wrong chips on my hardware. But as someone else mentioned, it's probably not worth returning them since they will work. > I have some x9 SIMM's in my GVP series II hard card for the B2000 and >they are humming along nicely, thank you. I'm very happy for you. > The new x32 SIMM's used in the GVP '030 accelerators are another story. >They appear to be proprietary unto GVP and do not follow the JEDEC x32 (x36) >standard. How they get a 32 bit wide SIMM in a standard 30 pin SIMM socket >is beyond my comprehension. Maybe Ralph can comment on this one? > > >>Michael M Morrison /| |\ > > > Jeff Easton Zenith Data Systems > // Systems Engineer > \X/ easton%zds-oem@caspian.cs.andrews.edu > easton@andrews.edu > What? Preemptive Multitasking in only 256K of RAM? :^) :^) -- Michael M Morrison /| |\ mmm@reaper.chi.il.us | | Cash, for Cache.. | | reaper!mmm@miroc.chi.il.us \| Hmm.. sounds fair. |/