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Microprocessor

Microprocessor
DMA signal/signals in 8085 is/are

 HOLD.
 HLDA.
 READY.
 All.

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Microprocessor
Which of the following conditions is not allowed in an RS latch?

R is negated, S is asserted
R is negated, S is negated
R is asserted, S is asserted
R is asserted, S is negated

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Microprocessor
While STC instruction executes,

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

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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
 2, 1, 4 and 3
 1, 3, 2 and 4

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Microprocessor
In 8085 name/names of the 16 bit registers is/are

 none of these.
 program counter.
 stack pointer.
 both A and B.

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Microprocessor
The five flags in 8085 are designated as

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

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