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Microprocessor

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

 256
 285
 65536
 512

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Microprocessor
How many bytes in a zero memory page should be reserved for vectors used by RST instructions?

 16.
 32.
 128.
 64.

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Microprocessor
Bus Interface Unit (BIU) in 8086 performs the following functions:

 All the above.
 Instruction fetch.
 Arithmatic and Logic operations.
 Instruction decoding.

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Microprocessor
In 8085, the pins for SID and SOD are

4 and 5 respectively
5 and 4 respectively
3 and 4 respectively
4 and 3 respectively

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Microprocessor
XCHG instruction exchanges the content of H-L with ______ register pair.

 PSW
 Stack Pointer
 B-C
 D-E

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Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

 MOV A, 00H
 SUB A
 CLR A
 ORA A

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