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Microprocessor

Microprocessor
A microcomputer consists of

 I/O device
All of these
 a microprocessor
 memory

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Microprocessor
After RESET 8255 will be in

 mode 0; all ports are input
 unchanged condition
 mode 2
 mode 0; all ports are output

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Microprocessor
An 8-bit microprocessor can have ………….. address lines.

 8
 cannot be predicted
 16
 32

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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
 SIM
 RIM
 EI

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Microprocessor
When the write enable input is not asserted, the gated D latch _________ its output.

Sets
Can not change
Complements
Clears

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Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

 Both A & R are true and R is the correct explanation of A
 A is false but R is true
 Both A & R are true but R is not the correct explanation of A
 A is true but R is false

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