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Microprocessor

Microprocessor
Identify the communication interfacing device from the following

 8251
 8257
 8155
 8255

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Microprocessor
The reason for the presence of ALE pin in 8085, but not in 6800 is that

 8085 uses I/O mapped I/O, whereas 6800 uses memory mapped I/O
 None
 8085 has multiplexed bus, whereas 6800 does not have
 8085 has 5 interrupts lines, whereas 6800 has only two

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Microprocessor
In a computer the data transfer between hard disk and CPU is nearly the same as that between diskette and CPU.

True
False

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Microprocessor
An 8-bit microprocessor signifies that

 8-bit data bus
 8-bit controller
 8-bit address bus
 8-interrupt lines

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

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Microprocessor
In an 8085 microprocessor based system, the contents of SP are 1000H, PUSH B instruction will transfer the contents of registers B & C respectively for memory locations

 1000 H and 0FFF H
 1000 H and 1001 H
 0FFE H and 0FFF H
 0FFF H and 0FFE H

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