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Microprocessor

Microprocessor
Which one of the following microprocessor has 16-bit data bus?

 8085
 Z-80
 6502
 68000

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Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

 MOV A, 00H
 ORA A
 SUB A
 CLR A

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Microprocessor
Both the ALU and control section of CPU employ which special purpose storage location?

 Accumulators
 Buffers
 Decoders
 Registers

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Microprocessor
PSW stands for

 accumulator contents
 flag byte
 accumulator and flag register contents
 none

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Microprocessor
The operating modes of 8255 A are called

Mode 0, mode 2 and mode 3
Mode 0 and mode 1
Mode 0 and mode 2
Mode 0, mode 1 and mode 2

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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

 010001000
 11000100
 00000100
 01000000

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