The internal characteristics of the individual flash memory cells exhibit characteristics similar to those of the corresponding gates. There are two main types of flash memory, which are named after the NAND and NOR logic gates. Flash memory was developed from EEPROM (electrically erasable programmable read-only memory).Flash memory is an electronic non-volatile computer storage medium that can be electrically erased and reprogrammed.Does the “flash memory chip” mean the same as the “non-volatile ROM”, both meaning where BIOS is stored?.After current advances, thanks to EEPROMs, you do not have to remove chip to do such operations, you just make the computer do the job electrically. For such operations in the past, you had to remove the BIOS chip from the board, put a new one in (if it was not PROM or EPROM), or if it was EPROM, you had to get it to the manufacturer and let them re-program the chip, then re-attach it to the board. The ROM being EEP means that the BIOS can be re-written or updated. The contents of the memory stays when the power is cut off, unlike volatile RAM. So the read-only here is about the chip being non-volatile. The BIOS program itself is stored in an EEPROM (which can be lectrically rasable and rogrammable ead nly emory) or flash-memory. ROM is read only, so why can the BIOS contents be rewritten?.SuperUser contributor Varaquilex has the answer for us: What exactly, is the deal here? Is the BIOS being stored on two ‘different’ mediums or just a single one? The Answer ROM is read only, so why can the BIOS contents be rewritten? Does the “flash memory chip” mean the same thing as the “non-volatile ROM”, both meaning where BIOS is stored? This allows BIOS software to be easily upgraded to add new features or fix bugs, but can make the computer vulnerable to BIOS rootkits. … In modern computer systems, the BIOS contents are stored on a flash memory chip so that the contents can be rewritten without removing the chip from the motherboard. BIOS software is stored on a non-volatile ROM chip on the motherboard.SuperUser reader T… wants to know where the BIOS is actually stored:

Bio key driver