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Microprocessor

Microprocessor
In order to save accumulator value on the stack, which of the following instruction may be used

 PUSH SP
 POP PSW
 PUSH PSW
 PUSH A

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Microprocessor
Maximum of how many devices can be connected simultaneously to the microprocessor via 8257 in DMA data transfer mode?

 4
 6
 10
 8

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Microprocessor
Which one of the following statement is false?

 A microprocessor has an ALU
 A microprocessor has bi-directional data bus
 A microprocessor has unidirectional address bus
 A microprocessor has bi-directional address bus

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Microprocessor
Each instruction in assembly language program has the following fields:Lable fieldMnemonic fieldOperand fieldComment fieldThe correct sequence of these fields is?

1, 2, 3, 4
2, 1, 3, 4
2, 1, 4, 3
1, 2, 4, 3

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Microprocessor
Which of the following is not a general purpose peripheral?

Programmable interval timer
Programmable CRT controller
I/O port
Programmable interrupt controller

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Microprocessor
CALL instruction is a ______ instruction.

 4 bytes
 1 bytes
 2 bytes
 3 bytes

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