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Microprocessor

Microprocessor
During OPCODE fetch the state of S0 and S1 is

 00
 10
 11
 01

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Microprocessor
Let the content of accumulator and register B be 0000 0100 and 0100 0000 respectively before execution of instruction SUB B. The content of accumulator after the execution of this instruction will be

 11000100
 00000100
 01000000
 010001000

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Microprocessor
Assuming LSB is at position 0 and MSB at position 7, which bit positions are not used (Undefined) in flag register of an 8085 microprocessor?

 1, 2, 5
 1, 3, 4
 1, 3, 5
 2, 3, 5

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Microprocessor
DMA signal/signals in 8085 is/are

 READY.
 HOLD.
 HLDA.
 All.

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Microprocessor
Which of the following interrupt is both level and edge sensitive?

 RST 7.5
 RST 5.5
 TRAP
 INTR

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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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