'Evening All, I did the "web monkey"-thing and here's what I found:
(from: http://tinyurl.com/rzr5) > The definition for the Cuda Chip is as follows: > > A microcontroller chip that serves as the managing circuitry for the Apple > Desktop Bus and the real-time clock. It oversees the power on and off of the > system. It maintains the parameter RAM, better known as PRAM. It also manages > and maintains information regarding all system resets from various commands. > Examples of this are: keyboard restart, lose of power, software restart. and (from: http://tinyurl.com/rzrl) > Technically Speaking: The Cuda Button and the PMU -- Solving Startup Problems > > Cuda button > > Most recent Mac models have a small, circular, usually red, button on the > logic board called the Cuda button. When you press the Cuda button, it resets > the Mac's "permanent" settings even more thoroughly than a reset of the PRAM. > You should only need to use this button as an absolute last resort for > PRAM-related problems. > > Its location varies from model to model, but a visual scan of the logic board > should reveal it. On the iMac it is located near the RAM modules. On the Blue > and White G3 Macs, if you open the computer, you will see two buttons behind > the PCI slots marked "Power On." The left one (as you face the front of the > Mac) is the normal Power button. The right one is the Cuda button. > > Pressing the Cuda button is often advised if your Mac does not start up after > installing a RAM or processor upgrade. The Cuda button may also help if your > hard drive is unwilling to even start spinning at startup. It is similarly > advised any time the Mac completely fails to start up, especially if the > failure is very early in the startup sequence (such as a failure to even > produce a startup tone). Also possibly helpful for this problem is to remove > and reseat all RAM, because defective RAM can also cause these symptoms. > > One other problem where pressing the Cuda button may help is if your monitor > screen goes black and stays black even though its power light is on and > everything else seems to be working normally. If restarting and zapping the > PRAM has no effect (or only works sporadically), try the Cuda button. > > More technically, what the Cuda button does is reset the data stored in the > Cuda Microcontroller Chip. According to Apple, the main functions of this chip > are to: > > * Turn system power on and off. > * Manage system resets from various commands. > * Maintain parameter RAM. > * Manage the Apple Desktop Bus (ADB). > * Manage the real-time clock. > * Let an external signal from either Apple GeoPort serial port control >system power. HTH, James Fraser -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.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/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
