The suppliers of system software

All PCs have instructions in ROM chips on the motherboard. The ROM chips are supplied by specialty software manufacturers, who make BIOS chips. The primary suppliers are:

Phoenix

AMI ( American Megatrends )

Award

You can read the name of your BIOS chip during start-up. You can also see the chip on the system board. Here is a picture (slightly blurred) of an Award ROM chip:

Here is an AMI chip with BIOS and start-up instructions:



Let us look at the different components inside the ROM chip.