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Cache Size and ROM
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- 1Cache Size: The size of the cache normally refers actually to the size of the data store, where the memory elements are actually stored. PC level 2 cache is either 256 KB or 512 KB, but can be as small as 64 KB on older machines, or as high as 1 MB or even 2 MB. Within processors, level 1 cache usually ranges in size from 8 KB to 64 KB.ROM:
Once data has been written onto a ROM chip, it cannot be removed and can only be read. Unlike main memory (RAM), ROM retains its contents even when the computer is turned off. ROM is referred to as being nonvolatile - volatile is when the computer turns off memory is is still stored-