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IBM Personal Computer
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=== ROM BIOS === The BIOS is the firmware of the IBM PC, occupying one 8 KB chip on the motherboard. It provides bootstrap code and a library of common functions that all software can use for many purposes, such as video output, keyboard input, disk access, interrupt handling, testing memory, and other functions. IBM shipped three versions of the BIOS throughout the PC's lifespan, with the dates 04/24/81, 10/19/81, and 10/27/82 (the first to boot from hard disk). The company offered an upgrade kit.{{r|feldmann19851001}}
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