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Microprocessor

Microprocessor
The five flags in 8085 are designated as

Z, CY, S, D, AC
Z, CY, S, P and AC
Z, C, S, P, AC
D, Z, S, P, AC

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Microprocessor
Identify the programmable DMA controller from the following

 8251
 8257
 8253
 8279

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Microprocessor
While using a frequency counter for measuring frequency, two modes of measurement are possible: Period time Frequency mode There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4MHz, the crossover frequency is given by

 8 Mhz.
 2 Mhz.
 1Khz.
 2 Khz.

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

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

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Microprocessor
In 8085 microprocessor, in response to RST 7.5 interrupts the execution is transferred to memory location

 003CH
 0034H
 0000H
 002CH

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Microprocessor
For the number A[15:0] = 0110110010001111, A[14:13] is ______ A[3:2].

Less than
The same as
Greater than
Cannot be determined

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