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Microprocessor

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

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

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Microprocessor
A combinational PLD with a fixed AND array and a programmable OR array is called a

 PLD
 PAL
 PROM
 PLA

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

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Microprocessor
Maximum number of I/O that can be addressed by the INTEL 8085 is

 65536
 256
 512
 285

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Microprocessor
In 8085 which addressing mode is also called inherent addressing?

Immediate
Register
Direct
Implicit

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Microprocessor
Let the content of accumulator and register B be 0000 0100 and 0100 0000 respectively before execution of instruction SUB B. The content of accumulator after the execution of this instruction will be

 010001000
 01000000
 11000100
 00000100

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