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Message: <blockquote data-quote="Topper" data-source="post: 600921" data-attributes="member: 186250"><p>The standard method of storing such detail is to use an EEprom, or to make more of that an Electronically Erasable Programmable Read Only Memory chip. This means that information will only change when the information is written over or flashed. Sometimes they use a cheaper chip and hold the information by charging a capacitor up and feeding the chip, but capacitors do fail as do batteries. There probably are other methods but I am not familair with them, they are not as you correctly mention like a PC Mobo and have a Cmos chip backed up with a battery, but could be using a capacitor as mentioned</p></blockquote><p></p>