Date: Wed, 17 Mar 1999 13:50:43 -0600 From: Bob Willcox <bob@luke.pmr.com> To: Darryl Okahata <darrylo@sr.hp.com> Cc: Bob Willcox <bob@pmr.com>, John Preisler <john@vapornet.net>, freebsd-smp@FreeBSD.ORG Subject: Re: celeron smp hack Message-ID: <19990317135043.A32478@luke.pmr.com> In-Reply-To: <199903170352.TAA09370@mina.sr.hp.com>; from Darryl Okahata on Tue, Mar 16, 1999 at 07:52:16PM -0800 References: <19990313164951.A41414@luke.pmr.com> <199903170352.TAA09370@mina.sr.hp.com>
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On Tue, Mar 16, 1999 at 07:52:16PM -0800, Darryl Okahata wrote: > Bob Willcox <bob@pmr.com> wrote: > > > On Wed, Mar 10, 1999 at 11:52:27PM -0800, Darryl Okahata wrote: > > > > > That's the hard way. For the easier way, see the various dual > > > celeron articles at: > > > > > > http://www.cpu-central.com/ > > > > Our preference would have been to do it the easier way (with the MSI > > converter boards), but he was unable to locate any within the timeframe > > that we would have needed them so we modified the slot 1 processor > > boards. I've also heard that there are converter boards available with > > jumpers to effect the change, though I've never seen them or anyplace > > claiming to have them so they may not exist. > > A co-worker did the slot-1 modification (where you have to drill a > hole). It works, but he's had problems with wires breaking (he had to > solder a wire near the edge connector pins, and that wire is constantly > breaking off -- the top of the motherboard socket can hit the wire and > knock it loose). We had some problems with this as well. We wound up shaving (with an exacto knife) some of the connector plastic away and using a burnshing tool (that I used to use for cleaning relay contacts back in the '60s) to flatten the fine wire that was soldered to the land. Still don't trust it though. My son is unlikely to pull either processor card soon (the wires get "pushed" off as the card is inserted into the socket). :-( > > I did the socket-370-to-slot-1 modification, and it's easier -- no > drilling, and just one wire to solder. I don't have any problems with > breaking wires. However, the adapters I have use tin plated edge > connectors, and so I may have oxidation problems later on; it works, > though, and I'll look to replace them with gold-plated adapters someday. > > The soldering was tricky, though, due to the small wire and pads. > You'll need a very fine-tipped soldering iron, at least, and a stereo > microscope or magnifier (one of those circular fluorescent lamps with a > huge magnifier in the middle) will make things much easier. You'll need > very good eyes, otherwise. > Well, I certainly don't have very good eyes (anymore). I used both a magnifying light (about 2-3 power, for some of the easier stuff) as well as a stereo microscope (7-30 power zoom) for the more detailed work. I doubt that I would have succeeded without them. Bob -- Bob Willcox The man who follows the crowd will usually get no bob@luke.pmr.com further than the crowd. The man who walks alone is Austin, TX likely to find himself in places no one has ever been. -- Alan Ashley-Pitt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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