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disablement and enablement of a computer serial port.
Can anyone explain how a computer serial port is disabled and enabled? Many Web pages cover the software topics but I've found nothing explaining how a BIOS disables a port. Is is done by clearing any interrupt assignment to the port? Is the power to the UART shut off? Other ways? Probably more than one technique has been used but not a large number.
Can anyone cite a Web page which answers this? Thanks, ... Peter E. |
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