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Microprocessor

Microprocessor
Identify the communication interfacing device from the following

 8255
 8155
 8257
 8251

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Microprocessor
Consider the following I) Sign flag II) Trap flag III) Parity flag IV) Auxiliary carry flag. Which one of the above flags is/are present in 8085 microprocessor?

 (I) ,(III) & (IV)
 (I) & (II)
 (I) only
 (II) & (III)

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Microprocessor
Identify the programmable interval timer from the following

 8253
 8279
 8252
 8275

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Microprocessor
How many bytes in a zero memory page should be reserved for vectors used by RST instructions?

 16.
 64.
 32.
 128.

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

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

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Microprocessor
Identify the non-programmable interfacing device from the following

 8257.
 8255.
 8212.
 8295.

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