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Microprocessor

Microprocessor
Total number of modes the 8253 can work

 4
 6
 12
 8

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Microprocessor
In 8085, the pins for SID and SOD are

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

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Microprocessor
Both the ALU and control section of CPU employ which special purpose storage location?

 Accumulators
 Buffers
 Decoders
 Registers

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Microprocessor
An I/O processor controls the flow of information between

Cache and main memory
Two I/O devices
Main memory and I/O devices
Cache memory and I/O devices

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Microprocessor
The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are

 irrelevant
 same as the content of A7-A0
 all bits set (i.e. FFH)
 all bits reset (i.e. 00H)

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Microprocessor
In an 8085 microprocessor based system, the contents of SP are 1000H, PUSH B instruction will transfer the contents of registers B & C respectively for memory locations

 0FFE H and 0FFF H
 1000 H and 0FFF H
 1000 H and 1001 H
 0FFF H and 0FFE H

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