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Microprocessor

Microprocessor
The 8085 microprocessor uses a crystal of frequency 6.25 Mhz. The T-state value is

 960ns
 320ns
 640ns
 1280ns

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Microprocessor
DMA signal/signals in 8085 is/are

 All.
 HLDA.
 READY.
 HOLD.

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

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Microprocessor
Let the content of accumulator and register B be 0000 0100 and 0100 0000 respectively before execution of instruction SUB B. The content of accumulator after the execution of this instruction will be

 01000000
 11000100
 00000100
 010001000

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Microprocessor
Length of the instruction POP D is

 3 byte
 2 byte
 1 byte
 4 byte

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Microprocessor
In order to complement the lower nibble of accumulator one can use

 ORI 0FH
 XRI 0FH
 CMA
 ANI 0FH

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