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Microprocessor

Microprocessor
Using one 8259 IC is equivalent to providing …………. INTR pins on 8085

 16
 18
 12
 8

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

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

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

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

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Microprocessor
Which one of the following statement is false?

 A microprocessor has an ALU
 A microprocessor has unidirectional address bus
 A microprocessor has bi-directional data bus
 A microprocessor has bi-directional address bus

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Microprocessor
A microcomputer consists of

 I/O device
All of these
 memory
 a microprocessor

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Microprocessor
PSW stands for

 accumulator contents
 accumulator and flag register contents
 none
 flag byte

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