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Microprocessor

Microprocessor
Total number of modes the 8253 can work

 4
 8
 6
 12

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Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

 ORA A
 SUB A
 CLR A
 MOV A, 00H

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Microprocessor
RST0 - RST7 are the __________ in 8085.

 hardware interrupts
 conditional interrupts
 logical interrupts
 software interrupts

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Microprocessor
The multiplexing of address bus and data buses is used in

 none of these.
 never multiplexed.
 depends on the internal architecture.
 all the microprocessors.

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

 Stack Pointer
 B-C
 D-E
 PSW

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Microprocessor
During OPCODE fetch the state of S0 and S1 is

 00
 01
 11
 10

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