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Microprocessor

Microprocessor
Identify the communication interfacing device from the following

 8251
 8255
 8155
 8257

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Microprocessor
_____________is used to read the status of the hardware interrupts (RST 7.5, RST 6.5, RST 5.5) by loading into the A register a byte which defines the condition of the mask bits for the interrupts.

 RIM
 DI
 EI
 SIM

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Microprocessor
Which general register or general register pair is incremented/decremented by 2 during PUSH and POP instructions?

 Program Counter.
 Stack Pointer.
 H-L.
 D-E.

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Microprocessor
Identify the programmable DMA controller from the following

 8251
 8253
 8279
 8257

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Microprocessor
A single instruction to clear the lower nibble of accumulator in 8085 language assembly is

 XRI 0FH
 ANI OFH
 XRI FOH
 ANI F0H

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Microprocessor
When any data transfer instruction, to transfer the data from memory to microprocessor, is executed the condition flags are

 not affected
 always reset
 always set
 affected indicating specific conditions

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