Unit 7 Research Paper 1: CMOS
1. Search the internet for information on “CMOS memory” and answer the
How has CMOS memory changed over the years?
Has the size of the CMOS memory increased, decreased, or stayed the
CMOS memory was originally used in the early days to store semi-permanent
data stored in chips. The speeds have increased and the noise has been reduced it also
went from analog to digital. With technological advancement over the years, it now uses
flash memory, which is a form of EEPROM instead of chips. The size of the CMOS
memory changes on how it is set. It either can be added or reduced from the computer.
However, these changes cause the computer to report a memory size mismatch. The
size of the CMOS memory has also pretty much stayed the same because there is no
need to increase the size. There was never any need to store more than 512 bytes in
the memory as it holds the absolute basic boot settings for the system. The typical size
is still 512 bytes currently.
2. Determine if the CMOS still utilizes RAM, requiring a battery on the
motherboard, or has evolved into using EEPROM.
There are still CMOS that use a battery on the mother board but EEPROM is
more popular today. CMOS has since evolved from using a RAM to using EEPROM. It's
a long name for a small chip that holds bits of data code that can be rewritten and
erased by an electrical charge, one byte at a time. Its data cannot be selectively
rewritten; the entire chip must be erased and rewritten to update its contents.
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