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Microprocessor

Microprocessor
In order to complement the lower nibble of accumulator one can use

 ORI 0FH
 XRI 0FH
 ANI 0FH
 CMA

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Microprocessor
When the write enable input is not asserted, the gated D latch _________ its output.

Can not change
Clears
Sets
Complements

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Microprocessor
Number of Hex digits needed to represent the 20-bit address of a memory location are

 4
 16
 20
 5

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Microprocessor
Identify the programmable DMA controller from the following

 8251
 8257
 8279
 8253

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Microprocessor
HLT opcode means

  load accumulator with contents of register.
  load data to accumulator.
  end of program.
  store result in memory.

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Microprocessor
RST 3 instruction will cause the processor to branch to the location

 0024H
 0018H
 0028H
 0000H

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