A NOR emulating device using a controller and NAND memories can be used in a computer system in placed of the main memory or in place of the BIOS NOR memory. Thus, the emulating device can function as a bootable memory. In addition, the device can act as a cache to the hard disk drive. Further, with...http://www.google.com.au/patents/US7519754?utm_source=gb-gplus-sharePatent US7519754 - Hard disk drive cache memory and playback device
