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Microprocessor

Microprocessor
Temporary registers in 8085 are

 D and E.
 H and L.
 B and C.
 W and Z.

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Microprocessor
In 8085, the pins for SID and SOD are

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

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Microprocessor
In order to complement the lower nibble of accumulator one can use

 CMA
 ORI 0FH
 XRI 0FH
 ANI 0FH

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Microprocessor
At the beginning of a fetch cycle, the contents of the program counter are

 transferred to memory data register.
 transferred to memory address register .
 incremented by one.
 transferred to address bus.

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Microprocessor
DMA signal/signals in 8085 is/are

 All.
 HOLD.
 HLDA.
 READY.

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

 64.
 32.
 16.
 128.

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