> Date: Wed, 5 Feb 2003 00:24:46 -0800 (PST) > From: Gregg Eshelman <[EMAIL PROTECTED]> > --- Mike Evans <[EMAIL PROTECTED]> wrote: > > 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? > There were some made that fit between the socket and CPU and had > voltage settings for the Intel DX4, AMD 5x86 and Cyrix 5x86. Not easy > to find now. Evergreen and Powerleap also used the surface mount > notebook version of the AMD on a carrier board to plug into the socket, > so did ImproveIt! Technologies. Yet another was the Kingston Turbochip. > ImproveIt! Technologies appears to be out of business. > > It's likely you can't change the bus speed of the DOS card, at least > not to anything other than 25 or 33 Mhz. If you just plug a chip in you > may have to "hotwire" it to force it to run at 4x speed. It's easy to do > but you have to be able to twist a small wire around two pins without > shorting either to the pin between them. ;)
I noticed in your other message that you'd used the Trinity Works chp also. They were the first ones I used; when I came back to get more a year later (state government budget vagaries), Trinity Works was gone. So we went with the Kingston Turbochips. I think between us we've mentioned about every upgrade chip manufacturer there was except PNY, who like Kingston has gotten out of the upgrade chip business and is back to just selling memory.Oh! and Intel! How could I forget the original Intel Overdrive Processor? I'll add that on the machines I plugged the 586/133 chips into, I used the 33 mhz chip setting and they worked fine (except of course the AT&T Globalyst 515's which wouldn't speed up no matter what I set and how I set it). For Mike's sake, I'll add that the resulting speed was between a Pentium 75 and 100; Intel advertised its Overdrive Processor for the 486 as equivalent to a Pentium 83 (which didn't exist--it was just a benchmark), which is about where the speed of the NCR and Unisys PC's I upgraded turned out. In practical terms, the results were basic Windows 95 machines; each had 16MB of RAM, so they could run MS Office 95 acceptably, but not Office 97. I learned later that with more RAM, at least the NCR's (which could hold up to 32 megs) could have run Office 97 at an acceptable speed.. Good luck finding something, Mike! I may have an upgrade chip here somewhere and if I do and it's compatible with an Apple DOS card, maybe we can work out a swap of some kind. It'd be easier to swap across the pond than paying me--then I'd have to convert the pounds to dollars. 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
