On Sat, Mar 29, 2003 at 05:17:50AM +1000, Adam wrote: > > There's a huge reason *not* to make a ROM that only supports 10 MB when > it's > > clear that larger SIMMs are going to come into play within a few months... > > If this limitation is the the ROM thanks to our friends at Apple, and if it > is patchable by someone with the necessary skills, why wouldn't Connectix or > someone come out with such a patch. > I'm sure they would have sold by the truckload. > > Unless of course they feared the wrath of Steve (or whoever...)
>From the (basic) knowledge I have of memory, the number of address lines (column and >row) that are either physically connected to the simm socket, or even physically available on the memory controller, comes into play. If the motherboard doesn't have the lines available to address more than 4mb per socket (and the onboard ram can be effectively seen as a hardwired simm, logically) then seeing any more will need hardware fiddling. One japanese site has a dodgy (but neat all the same!) hack which uses a spare address line from the memcjr memory controller in a Q605/LC475 to give it an extra simm socket, allowing for hacks with 260+mb of ram addressable in those. Without those hacks the machine can't physically see more than it's normal maximum of 136mb dana -- http://www.danamania.com/ -- Vintage Macs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Vintage Macs list info: <http://lowendmac.com/lists/vintagemacs.shtml> The FAQ: <http://macfaq.org/> --> 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/vintage.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
