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Microprocessor

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

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

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Microprocessor
I)A total of about one million bytes can be directly addressed by the 8086 microprocessor II)8086 has thirteen 16-bit registers III)8086 has eight flags IV)Compared to 8086, the 80286 provides a higher degree of memory protection Which one of the statements given above are correct?

 1,2 & 4
 2,3&4
 1,2 & 3
 1,3 &4

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Microprocessor
In 8085 microprocessor which one of the following statement is wrong

 there is a pin available for serial input
 serial I/O is not possible
 there is a pin available for serial output
 serial I/O is possible through SIM and RIM instruction

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Microprocessor
Which of the following conditions is not allowed in an RS latch?

R is asserted, S is negated
R is asserted, S is asserted
R is negated, S is negated
R is negated, S is asserted

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Microprocessor
Pick up the programmable interrupt controller from the following

 8257
 8279
 8259
 8275

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Microprocessor
The 8085 microprocessor enters into bus idle machine cycle whenever

 RST 7.5 is recognized
 INTR interrupt is recognized
 DAD RP instruction is executed
None of these

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