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Microprocessor

Microprocessor
What is the size (in bytes) of Prefetch queue in 8086?

 3.
 4.
 2.
 6.

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Microprocessor
Which of the data transfer is not possible in microprocessor

 accumulator to memory
 memory to accumulator
 memory to memory
 I/O device to accumulator

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Microprocessor
DMA is used between

 memory and I/O
 none
 microprocessor and I/O
 microprocessor and memory

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Microprocessor
In 8085, the pins for SID and SOD are

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

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Microprocessor
_____________is used to read the status of the hardware interrupts (RST 7.5, RST 6.5, RST 5.5) by loading into the A register a byte which defines the condition of the mask bits for the interrupts.

 DI
 EI
 RIM
 SIM

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Microprocessor
CALL instruction is a ______ instruction.

 1 bytes
 4 bytes
 2 bytes
 3 bytes

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