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Microprocessor

Microprocessor
SPHL instruction copies the content of H-L register pair to the _________.

 B-C
 D-E
 PSW
 Stack Pointer

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Microprocessor
Identify the programmable DMA controller from the following

 8251
 8279
 8257
 8253

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Microprocessor
What is mean by ALU

 Arithmetic logic upgrade
 Arithmetic local unsigned
 Arithmetic logic unsigned
 Arithmetic logic unit

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Microprocessor
After RESET 8255 will be in

 mode 0; all ports are input
 mode 2
 mode 0; all ports are output
 unchanged condition

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Microprocessor
A single instruction to clear the lower nibble of accumulator in 8085 language assembly is

 XRI 0FH
 ANI OFH
 XRI FOH
 ANI F0H

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Microprocessor
The reason for the presence of ALE pin in 8085, but not in 6800 is that

 None
 8085 has multiplexed bus, whereas 6800 does not have
 8085 has 5 interrupts lines, whereas 6800 has only two
 8085 uses I/O mapped I/O, whereas 6800 uses memory mapped I/O

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