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Microprocessor

Microprocessor
DMA signal/signals in 8085 is/are

 HOLD.
 All.
 READY.
 HLDA.

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Microprocessor
Consider the following statements: In 8085 microprocessor, data-bus and address bus are multiplexed in order to I)Increase the speed of microprocessor. II)Reduce the number of pins. III)Connect more peripheral chips. Which of these statements is/are correct?

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

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Microprocessor
The ROM programmed during manufacturing process itself is called

 EEPROM
 EPROM
 PROM
 MROM

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Microprocessor
Circuit A is a 1-bit adder; circuit B is a 1 bit multiplier.[Hint: Construct the truth table for the adder and the multiplier]

Circuit A has more gates than circuit B
None of these
Circuit B has more gates than circuit A
Circuit A has the same number of gates as circuit B

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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

 01000000
 11000100
 00000100
 010001000

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Microprocessor
In microprocessor based system DMA refers to

None of these
 direct memory access for the user
 direct memory access for microprocessor
 direct memory access for the I/O device

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