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Microprocessor

Microprocessor
In order to complement the lower nibble of accumulator one can use

 XRI 0FH
 ANI 0FH
 CMA
 ORI 0FH

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Microprocessor
A microprocessor without the interrupt facility

 cannot be used for DMA operation
 is not useful for process control system
 cannot be interfaced with any I/O devices
 is best suited for process control system

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Microprocessor
What is mean by ALU

 Arithmetic logic unit
 Arithmetic local unsigned
 Arithmetic logic upgrade
 Arithmetic logic unsigned

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Microprocessor
The microprocessor issues ALE during first T-state of

 fetch cycle only
 every machine cycle
 memory WRITE cycle only
 memory READ cycle only

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Microprocessor
A microprocessor differentiates between op code, data/address at any time by

 its internal registers
 the program counter
 the stack pointer
 the sequence in which memory contents are fetched by it

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Microprocessor
Maximum of how many devices can be connected simultaneously to the microprocessor via 8257 in DMA data transfer mode?

 4
 6
 10
 8

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