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Microprocessor

Microprocessor
Identify the communication interfacing device from the following

 8251
 8155
 8255
 8257

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Microprocessor
How many machine cycles are required for execution of IN 30H instruction

 5
 3
 4
 6

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Microprocessor
In a microprocessor based system the stack is always in

 EPROM
 RAM
 ROM
 microprocessor

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Microprocessor
What is SIM?

 Sorting interrupt mask.
 Select interrupt mask.
 None of these.
  Set interrupt mask.

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Microprocessor
IC 7485 cannot be cascadeD.

True
False

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Microprocessor
A bus connected between the CPU and main memory that permits transfer of information between main memory and the CPU is known as

 DMA bus
 Address bus
 Control bus
 Memory bus

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