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

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

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Microprocessor
How can we make any bit of a register “1”?

 AND that bit with “0” and remaining bits with “1”.
 AND that bit with “1” and remaining bits with “0”.
 OR that bit with “0” and remaining bits with “1”.
 OR that bit with “1” and remaining bits with “0”.

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