| 摘要 |
The controller has a first source of electric supply that produces different voltage levels depending on input signals and a second source of electric supply that serves as the principal supply to the computer while it is operating. The controller has a supply switch to produce a first voltage level while the supply switch is closed and a second level while it is open. The controller responds by delivering different signals to a microprocessor, which communicates with the computer via the data bus of the microprocessor and the data bus of the computer to ensure safe start-up and shut-down.
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