> From: "Mike Evans" <[EMAIL PROTECTED]> > Date: Tue, 4 Feb 2003 23:58:55 -0000 > I would like to replace the 486 on my Apple DOS card with a 586. The > instructions say I need a voltage regulator... will any old one do or > does it have to be specific to the CPU and the motherboard?
At this point, Mike, I'd have to say "rotsa ruck"! About 5-6 years ago I was involved in upgrading a bunch of 486/33 PCs to 586/133 processors. At that time, several companies were selling combination packages of processor and regulator, often with DIP switches to fine-tune the processor to work with the computer. Here's what you've got; the early 486s (up thru the 486DX2/66, I believe) all used a common voltage. The later 486s (including the 486-pin-compatible 586s) used a lower voltage. The regulator goes between the new chip and the chip socket to convert the voltage being supplied to the socket by the motherboard to that which the chip uses. You may be able to find a regulator that will go with a 586 so you can seat it on the Apple DOS card, but there's no guarantee of compatibility or that it'll run any faster. I plugged some of those upgrade processor units into some NCR System 3230's (486DX/33) and it was plug-and-play. I finangled like crazy with some AT&T Globalyst 515's (486DX/50) and got zero speed increase. I just checked a few sites of companies that made those chip/regulator combos, and none of them are selling 486->586 upgrade processors now. Some aren't selling any kind of upgrade processor. You might check with PowerLeap <http://www.powerleap.com> or Evergreen Technologies <http://www.evertech.com>, two of the companies which still produce upgrade processors, and they might be able to point you to somebody that still has 486->586 upgrade processors, or at least tell you whether their upgrade processor had been compatible with the Apple DOS card. You might also try Kingston Technology <http://www.kingston.com> and see what info they still have around on their Kingston Turbochip 133 (a processor package that worked very well for me and was probably the most popular). They don't appear to sell upgrade processors at all now, but I did a Yahoo! search for "Kingston Turbochip" and got a number of hits on vendors' pages. Perhaps somebody still has some residual stock. Just make sure that it's compatible with your card before you get it. Hope this helps. I believe you'll have much less hassle if you can find a compatible upgrade processor (chip+regulator) package rather than finding a voltage regulator and a 586 chip and trying to make it all work together. God bless, Mike the MUGWump ============================================================================ I'm a MUGWump; my "MUG" is on the Mac side of the fence (since mid-2002), & my "Wump" is on the PC side (since 1989). I get the best of both worlds! -- Mac-N-DOS is sponsored by <http://lowendmac.com/> and... / Buy books, CDs, videos, and more from Amazon.com \ / <http://www.amazon.com/exec/obidos/redirect-home/lowendmac> \ Support Low End Mac <http://lowendmac.com/lists/support.html> Mac-N-DOS list info: <http://lowendmac.com/lists/mac-n-dos.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/mac-n-dos%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
