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Microprocessor

Microprocessor
In order to complement the lower nibble of accumulator one can use

 ANI 0FH
 ORI 0FH
 CMA
 XRI 0FH

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Microprocessor
How many 16-bit special purpose registers are present in 8085 microprocessor?

 6
 2
 8
 16

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Microprocessor
Identify the programmable DMA controller from the following

 8257
 8253
 8279
 8251

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Microprocessor
During which T-state, contents of OP code from memory are loaded into IR (Instruction Register)?

 T1 OP code fetch
 T2 OP code fetch
 T4 OP code fetch
 T3 OP code fetch

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Microprocessor
The 8085 microprocessor enters into bus idle machine cycle whenever

 RST 7.5 is recognized
None of these
 DAD RP instruction is executed
 INTR interrupt is recognized

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Microprocessor
While INX B instruction execute,

 all flags will be affected
 only carry and zero flags will be affected
 only carry flag will be affected
 no flags will be affected

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