Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!caen!umich!sharkey!aucis!zds-oem!easton From: easton@zds-oem.UUCP (Jeff Easton) Newsgroups: comp.sys.amiga.hardware Subject: Re: SIMM Modules Message-ID: <1098@zds-oem.UUCP> Date: 15 May 91 00:15:04 GMT References: <1701@giaea.gi.oz> Organization: Zenith Data Systems, OEM Engineering Lines: 41 In article mmm@reaper.Chi.IL.US (Michael Marvin Morrison) writes: >In article <1701@giaea.gi.oz> s9133283@giaea.gi.oz (Noel Ashford) writes: >> >> I have just purchased some SIMM modules for my GVP Series II A500 hard drive. >> However the SIMM's I received are the 1 meg x 9 type, while the manual >> recommends using 1 meg x 8. What is the difference between these two types >> of SIMM modules. >> As an aside, I was a little dissapointed with the manual GVP supplied, as a >> lot of the utilities supplied on the drive are not mentioned in the manual. >> >> Thanks in advance > >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. I have some x9 SIMM's in my GVP series II hard card for the B2000 and they are humming along nicely, thank 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? :^) :^)