The author describes a flash memory device used to store the basic input/output system (BIOS) of a PC or notebook computer. Rapidly increasing computer complexity requires rapid and convenient BIOS modifications. BIOS code can be stored in ROM, EPROM, EEPROM, bulk erasable flash memory, or block erasable flash memory. Updating BIOS stored in ROM or EPROM requires much time and money. BIOS storage does not require EEPROM's feature of byte erasure. Rapid and inexpensive BIOS revisions can be accomplished in flash memory with update software provided on a desk or by modem. Block erasable flash memory provides the capability of BIOS updates while providing boot and recovery code protected from inadvertent program or erasure. BIOS code is easily updated in flash memory containing an internal program and erase sequence controller. A 1-Mb block erasable flash memory with an internal program and erase sequence controller is an ideal storage medium for PC and notebook computer BIOS code.
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