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Microprocessor

Microprocessor
During OPCODE fetch the state of S0 and S1 is

 01
 00
 10
 11

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Microprocessor
Total number of modes the 8253 can work

 12
 4
 8
 6

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Microprocessor
SPHL instruction copies the content of H-L register pair to the _________.

 PSW
 Stack Pointer
 D-E
 B-C

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

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

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Microprocessor
_____________is used to read the status of the hardware interrupts (RST 7.5, RST 6.5, RST 5.5) by loading into the A register a byte which defines the condition of the mask bits for the interrupts.

 EI
 SIM
 RIM
 DI

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Microprocessor
Each instruction in an assembly language program has the following fields 1. Label field 2. Mnemonic field 3. Operand field 4. Comment field What are the correct sequence of these fields?

 2, 4, 1 and 3
 1, 2, 3 and 4
 1, 3, 2 and 4
 2, 1, 4 and 3

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