The system ROM chip stores the system BIOS routines and CMOS setup
utility. SystemROMis distinctively labeled with the BIOS maker’s name, On older PCs, the BIOS routines were hard-coded onto the
FIGURE 7.1 POST card error code readout
system ROM chip, meaning that the BIOS were unchangeable without replacing
the entire ROM chip. Current motherboards use writable ROM chips such
as flash ROM. Writable ROM chips enable you to install updated BIOS information
without physically replacing the chip.