GATE EE 1994 | Microprocessor Question 26 | Digital Electronics

GATE EE 1994

MCQ (Single Correct Answer)

-0.3

The contents of the accumulator in an $$8085$$ microprocessor is altered after the execution of the instruction.

$$CMP$$ $$C$$

$$CPI$$ $$3A$$

$$ANI$$ $$5C$$

$$ORA$$ $$A$$

GATE EE 1993

MCQ (Single Correct Answer)

-0.3

Three devices $$A,$$ $$B$$ and $$C$$ have to be connected to a $$8085$$ microprocessor. Device $$A$$ has highest priority and device $$C$$ has the lowest priority. In this context which of the following is correct assignment of interrupt inputs?

$$A$$ uses $$TRAP,$$ $$B$$ uses $$RST$$ $$5.5$$ and $$C$$ uses $$RST$$ $$6.5$$

A uses $$RST$$ $$7.5,$$ $$B$$ uses $$RST$$ $$6.5$$ and $$C$$ uses $$RST$$ $$5.5$$

$$A$$ uses $$RST$$ $$5.5,$$ $$B$$ uses $$RST$$ $$6.5$$ and $$C$$ uses $$RST$$ $$7.5$$

$$A$$ uses $$RST$$ $$5.5,$$ $$B$$ uses $$RST$$ $$6.5$$ and $$C$$ uses $$TRAP$$

GATE EE 1992

MCQ (Single Correct Answer)

-0.3

If the $$HLT$$ instruction of a $$8085$$ microprocessor is executed,

the microprocessor is disconnected from the system bus till the Reset is pressed

the microprocessor enters into a Halt state and the buses are tri-stated

the microprocessor halts execution of the program and returns to monitor

the microprocessor reloads the program from the locations $$0024$$ and $$0025H.$$

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