Microprocessor
The microprocessor may be made to exit from HALT state by asserting

 READY line
 RESTART
 A or B or HOLD line
 any of the five interrupt lines

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Microprocessor
Ready pin of microprocessor is used

 to indicate that microprocessor is ready to receive outputs
 to indicate that microprocessor is ready to receive inputs
 to provide direct memory access
 to introduce wait state

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Microprocessor
The correct sequence of steps in the instruction cycle of a basic computer is

 Fetch, Read effective address, Decode and Execute.
 Fetch, Execute, Decode and Read effective address.
 Fetch, Decode, Read effective address and, Execute.
 Read effective address, Decode, Fetch and Execute.

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