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Microprocessor

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

 8085
 6502
 Z-80
 68000

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Microprocessor
SUB A instruction in 8085

 sets zero and sign flags
 sets zero and carry flags
 reset carry and sign flags
 reset zero and parity flags

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Microprocessor
In one’s complement 8 bit representation 11111111 represents

1
+0
-0
-1

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

 To latch data D0-D7 from data bus
 To achieve all the functions listed above
 Enable the data bus to be used as low order address bus
 To disable data bus

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Microprocessor
The frequency of the driving network connected between pins 1 and 2 of 8085 microprocessor is

 four times the desired frequency
None of these
 twice the desired frequency
 equal to the desired frequency

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Microprocessor
The data bus of any microprocessor is always

 None
 Bi-directional
 Either unidirectional or bi-directional
 Unidirectional

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