Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!srcsip!tcnet!pwcs!stag!dynasoft!john From: dynasoft!john@stag.UUCP (John Stanley) Newsgroups: comp.sys.atari.st Subject: Re: 520STFM Message-ID: <0512891714000798@dynasoft.UUCP> Date: 12 Jun 89 22:14:00 GMT Reply-To: dynasoft!john@stag.UUCP (John Stanley) Organization: DynaSoft Systems, Minneapolis, MN. Lines: 43 X-Member-Of: STdNET (ST Developer's Network) [tim@brspyr1.BRS.Com (Tim Northrup) writes...] > From article by dynasoft!john@stag.UUCP (John Stanley): > | [george@electro.UUCP (George Reimer) writes...] > |> > |> I carefully cleaned out the holes for the four chips, soldered > |> in 4 sockets and then inserted the 256k x 4 drams mailed to me > |> from IC Express, and volia! I had a 1040STfm! > |> > | > | It's amazing it was that simple... :^) > | > | Even more so when you realize it takes 16 x 256k (bit) > | chips to add 512K bytes of memory... == > > Read carefully --> 256k x 4!!!! chips --> 4 x 256k x 4 = 16 x 256k Tim, how about if you "read carefully". See anything in his message that mentions 4 bit wide chips?? Nowhere in his message (or any previous msg I saw) had there been any indication that anyone has been using 256k x 4bit chips for ST memory expansion. All 512k memory upgrades I'd heard of (before this) for the 520 (including soldered-in ones) used 16 x (256k x 1bit) chips. If 4bit wide chips are useable (required?) on the newer ST's, that's fine, but he really should have mentioned he was using 4 bit wide chips. Anything else is misleading to novice users (and those uninformed about the change) which was the entire reason I posted my reply. For the record, I've been told by a couple of other people that 4 bit wide chips are now being used on some of the newer ST's so this may be the "new standard". On the other hand, I spoke to my local ST dealer about this and they were also surprised to hear about 4 bit wide chips being used in a 520. If this is common knowledge, it's somehow managed to bypass my corner of the universe which means it may cause confustion for other people as well... My msg was not seriously-critical twords George. That should have been obvious from the smiley face... He was leaving out some important piece of information and I just tried to make it obvious by my message. --- John Stanley Software Consultant / Dynasoft Systems