At 10:21 -0800 01/26/2003, tom wrote: >Do any of you hardware tinkerers out there have a pc version of the >adaptec aha-2940uw ultra wide scsi card? > >My next project involves acquiring such a card and transitioning my raid >off of the e100 so I can use it under linux. I have a couple questions >if anybody in supermac land has such a card (jeff, mad dog?)
Here's an article I wrote on the topic over four years ago. It is out of date. Here are the updates: Everywhere I wrote EEPROM, substitute Flash. The memory chip on the thing is really a Flash, though the distinction isn't really relevant. Installing a DIP Flash at U5 will work. This has since been confirmed many times. So the easy way to do the modification is: 1) clip the pins on the PLCC flash at U6. 2) desolder the pins one at a time with any low wattage soldering pencil (I like the 15 watt grounded pencil at Radio Shack for under $10). 3) Removet the solder from the holes at U5. Sometimes you can do this with solder braid, but there are usually a few stubborn holes. *Don't grind the pencil into the hole through the braid.* You'll ruin the board. If you get a stubborn hole, put your pencil tip on one side of the hole and a pin (preferably one with a little plastic bead at the blunt end) on the other side. Push the pin through the molten solder. REmove the pencil, extract the pin after a moment. Now use desolder braid to clean up the "volcano" of solder or snip the protrusion off with snips and then clean up with desolder braid. You may also tray a vacuum desoldering tool for the above. 4) Install a 32 pin DIP socket at U5. I like the ones with machined pins rather than the spring/brush types, but it doesn't matter a lot. Augat and Mill-Max Manufacturing make the machined pin types. Digi-Key's part number on the socket is ED3732-ND. The last time I checked, JDR had the sockets as well. 5) Plug in an Atmel AT29C010[A] - xx[x]PC chip or equivalent in the socket. The [] indicate optional characters and the x's indicate numbers. The chip is available in a variety of speeds. 120 will work fine, but faster speeds (lower numbers) are okay too, if that's what is available. So you might use a 29C010A-120PC or a 29C010A-90PC or a 29C010-120PC, etc. Digi-Key has the chip as part number AT29C010A-70PC-ND for about $7 each. Sometimes you can find a much lower unit price on Ebay if you're willing to wait, but there're no guarantees on that, plus the total cost on Ebay is likely to be at least as much, because what you're most likely to find is a lot of 20 or 100 or something at about $.50 each but or course, you're bidding on the whole lot. It's great if you have a use for the extras... The last time I checked JDR had the chips as well. 6) Flash the card as per the instructions in the article. Jeff Walther -- SuperMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | Service & Replacement Parts [EMAIL PROTECTED] | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> SuperMacs list info: <http://lowendmac.com/supermacs/list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/supermacs%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
