mts10271@uxa.cso.uiuc.edu (10/17/90)
Does anyone have docs on how to upgrade a Mega 2 to 4 Megs? I have checked my motherboard and all the traces seem to be there, so it seems to be a matter of adding the rams and capacitors. The rams should be no problem, but I need to know what capacitance the capacitors should have, if there are any jumpers that need to be connected, etc. If anyone has pulled this off, please drop me a line. Thanks, Mike Stepniczka mts10271@uxa.cso.uiuc.edu
fortinp@bwdls56.bnr.ca (Pierre Fortin) (10/18/90)
In article <46300103@uxa.cso.uiuc.edu>, mts10271@uxa.cso.uiuc.edu writes: > > Does anyone have docs on how to upgrade a Mega 2 to 4 Megs? > I have checked my motherboard and all the traces seem to be there, so > it seems to be a matter of adding the rams and capacitors. The rams > should be no problem, but I need to know what capacitance the capacitors > should have, if there are any jumpers that need to be connected, etc. > If anyone has pulled this off, please drop me a line. > > Thanks, > Mike Stepniczka > mts10271@uxa.cso.uiuc.edu The worst part about this upgrade was sucking the solder out of the over 300 holes; don't use your lips or a straw: possible lead poisoning. :^) :^) The capacitors are 0.22uF 50V Ceramic Axial types (C80-C111) [available from Best Electronis as a kit of 16] Three resistors (33 ohm 1/4w) must be added; near the front edge of the board in the center. DRAM (1Mx1). I'm running 70ns parts in the additional 2-Meg, but I think you can go as slow as 120ns. 4-Megs is great! Big Ramdisks! "Out-of-memory" no more! :^) Good luck, Pierre Pierre Fortin Bell-Northern Research I know, my postings are Internet Systems P.O.Box 3511, Stn C terse and humourless. So? (613)763-2598 Ottawa, Ontario RIP: aptly named protocol fortinp@bnr.ca Canada K1Y 4H7 AppleTalk: Adam&Eve's design