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Microprocessor

Microprocessor
SPHL instruction copies the content of H-L register pair to the _________.

 B-C
 D-E
 PSW
 Stack Pointer

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Microprocessor
Which instruction is required to rotate the content of accumulator one bit right along with carry?

 RAR
 RLC
 RRC
 RAL

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Microprocessor
Let the content of accumulator and register B be 0000 0100 and 0100 0000 respectively before execution of instruction SUB B. The content of accumulator after the execution of this instruction will be

 00000100
 010001000
 01000000
 11000100

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Microprocessor
XCHG instruction exchanges the content of H-L with ______ register pair.

 Stack Pointer
 D-E
 PSW
 B-C

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Microprocessor
After RESET 8255 will be in

 mode 0; all ports are output
 mode 0; all ports are input
 unchanged condition
 mode 2

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Microprocessor
Identify the programmable interval timer from the following

 8252
 8275
 8279
 8253

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