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Microprocessor

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

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

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Microprocessor
The five flags in 8085 are designated as

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

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

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

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Microprocessor
The microprocessor may be made to exit from HALT state by asserting

 A or B or HOLD line
 any of the five interrupt lines
 READY line
 RESTART

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Microprocessor
Pick up the programmable interrupt controller from the following

 8279
 8259
 8257
 8275

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Microprocessor
The processor status word of 8085 microprocessor has five flags namely:

 S, OV, AC, P, CY
 S, Z, AC, P, CY
 S, Z, AC, P, OV
 S, Z, OV, P, CY

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