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Microprocessor

Microprocessor
In order to save accumulator value on the stack, which of the following instruction may be used

 POP PSW
 PUSH A
 PUSH PSW
 PUSH SP

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Microprocessor
Using DeMorgan’s Theorem we can convert any AND-OR structure into

NOR-NAND
NAND-NAND
OR-NAND
NAND-NOR

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

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

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Microprocessor
In 8085 microprocessor, the RST6 instruction transfer programme execution to following location

 0024H.
 0060H.
 0030H.
 0048H.

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Microprocessor
The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are

 all bits set (i.e. FFH)
 same as the content of A7-A0
 irrelevant
 all bits reset (i.e. 00H)

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Microprocessor
The relation among IC (Instruction Cycle), FC (Fetch cycle) and EC (Execute Cycle) is

 IC = FC + 2EC
 EC = IC + FC
 IC = FC + EC
 IC = FC - EC

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