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Microprocessor

Microprocessor
Pick out the matching pair

 READY; RIM
 SID; SIM
 HOLD; DMA
 S0;S1;wait status

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Microprocessor
RST0 - RST7 are the __________ in 8085.

 hardware interrupts
 software interrupts
 conditional interrupts
 logical interrupts

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Microprocessor
Identify the programmable DMA controller from the following

 8253
 8251
 8257
 8279

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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?

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

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Microprocessor
The relation among IC (Instruction Cycle), FC (Fetch cycle) and EC (Execute Cycle) is

 IC = FC - EC
 IC = FC + EC
 EC = IC + FC
 IC = FC + 2EC

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Microprocessor
The number of interrupt lines in 8085 is

2
5
3
4

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