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Microprocessor

Microprocessor
Pick out the matching pair

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

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Microprocessor
During OPCODE fetch the state of S0 and S1 is

 10
 01
 11
 00

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Microprocessor
The microprocessor issues ALE during first T-state of

 memory WRITE cycle only
 memory READ cycle only
 fetch cycle only
 every machine cycle

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Microprocessor
Using DeMorgan’s Theorem we can convert any AND-OR structure into

OR-NAND
NAND-NAND
NOR-NAND
NAND-NOR

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Microprocessor
DMA is used between

 memory and I/O
 microprocessor and I/O
 none
 microprocessor and memory

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Microprocessor
The five flags in 8085 are designated as

Z, CY, S, P and AC
D, Z, S, P, AC
Z, C, S, P, AC
Z, CY, S, D, AC

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