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Microprocessor

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

 6502
 Z-80
 68000
 8085

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Microprocessor
In a microcomputer , the address of memory locations are binary numbers that identify each memory circuit where a byte is stored. If a microcomputer uses 20-bit address, then numbers of different memory locations are

 220-1
 20
 220
 220 - 1

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

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

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Microprocessor
DMA signal/signals in 8085 is/are

 READY.
 HLDA.
 HOLD.
 All.

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Microprocessor
Which one of the following statement is false?

 A microprocessor has bi-directional address bus
 A microprocessor has an ALU
 A microprocessor has bi-directional data bus
 A microprocessor has unidirectional address bus

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

 CMA
 ORI 0FH
 XRI 0FH
 ANI 0FH

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