At 22:33 -0700 09/01/2002, Bolton Peck wrote: >> If someone can identify the manufacturer and model number of the pin >> grid array and plastic matrix on the bottom of ZIF CPU modules, I'll >> take a hack at building a 750FX board once I finish a couple of other >> projects... >> >> Jeff Walther >> > >Now that you mention it, I am wondering why no one ever made an > accelerator for these machines with RAM onboard it. You know, a > memory controller of some sort and a couple of PC133 or better yet, > PC2100 DIMM slot on it.
Ack. It'd be a nightmare. You'd have to... No, just leave it at it'd be nightmare. You'd quickly find that it was cheaper to replace the whole mess with a Motorola MPC106 controller and at that point you'd have a Beige G3. Besides, RAM access isn't much of a bottleneck to performance. With cache hits up around 85 % there isn't that much time spent waiting on RAM accesses. That's why our old machines with G3 and G4 upgrades still keep up pretty well with newer machines with super-fast RAM. Their RAM may be two or four or even eight times faster than ours but the improvement only applies to a small percentage of the accesses that the CPU makes. There's a name for this principal in computer architecture language. It's named after some guy. Basically, if your system spends 10% of its time doing some function, and you improve the speed of that function, the best overall improvement in system performance that you can get is 10% and then, only if you drop the time for that one function to 0. 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/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
