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Microprocessor

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

 1280ns
 960ns
 320ns
 640ns

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Microprocessor
SUB A instruction in 8085

 reset carry and sign flags
 sets zero and sign flags
 sets zero and carry flags
 reset zero and parity flags

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Microprocessor
XCHG instruction exchanges the content of H-L with ______ register pair.

 B-C
 D-E
 PSW
 Stack Pointer

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Microprocessor
A 37 bit mantissa has an accuracy of

11 decimal places
8 decimal places
10 decimal places
6 decimal places

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Microprocessor
Consider the following I) Sign flag II) Trap flag III) Parity flag IV) Auxiliary carry flag. Which one of the above flags is/are present in 8085 microprocessor?

 (II) & (III)
 (I) ,(III) & (IV)
 (I) only
 (I) & (II)

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Microprocessor
Which of the following instruction is not possible in 8085?

 POP B
 POP PSW
 POP D
 POP 30 H

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