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【多选题】
The computer system CPU and IO interface adopts interrupt control mode communication. Software designers are required to provide two types of programs for the computer system: interface interrupt mode communication initialization program and interface interrupt service program. Which of the following functions must be implemented by the interrupt service program. ()A.
Data communication with the interface
B.
To enable interrupt nesting, enable microprocessor interrupts
C.
Establish the correspondence between interrupt signals and interrupt service routines
D.
Clear the interrupt request status when the interrupt signal is generated
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