You need a radio transmitter that transmits some kind of radio wave signal, and an array of satelites to compare the postion to other parts of the world.
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Answer:
hardware-initiated reset
Explanation:
Once in protected mode, the 80286 is designed to remain there until it is reset by hardware.
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External hardware can be designed so that software can cause such a reset. In the 1984 PC/AT, such hardware combined with code in the BIOS allowed real mode re-entry and returned execution control to the program that caused the reset.
A. The force that moves electrons