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

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

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Microprocessor
Which of the following is not true during the execution of an interrupt service routine, which does not contain any EI instructions

 the microprocessor can be interrupted by a non-mask able interrupt
 the microprocessor cannot be interrupted by any mask able interrupt
 all interrupts except non-maskable interrupt are disabled
 the microprocessor cannot be interrupted by any interrupt

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