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Microprocessor

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

 PUSH PSW
 PUSH A
 POP PSW
 PUSH SP

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Microprocessor
The 8085 microprocessor uses a crystal of frequency 6.25 Mhz. The T-state value is

 320ns
 1280ns
 640ns
 960ns

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Microprocessor
How many bytes in a zero memory page should be reserved for vectors used by RST instructions?

 64.
 32.
 16.
 128.

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Microprocessor
Register pair used to indicate memory

 D and E
 H and L
 B and C
 W and Z

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Microprocessor
Which of the following is a valid integer constant?

127
127
125 + 3
127

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Microprocessor
The cycle required to fetch and execute an instruction in a 8085 microprocessor is which one of the following?

 Instruction cycle
 Memory cycle
 Clock cycle
 Machine cycle

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