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Microprocessor

Microprocessor
A 37 bit mantissa has an accuracy of

11 decimal places
8 decimal places
6 decimal places
10 decimal places

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Microprocessor
Which of the following instruction will never affect the zero flag?

 DCX Rp
 XRA R
 DCR R
 ORA R

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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
 DI
 SIM
 RIM

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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.

False
True

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Microprocessor
When an 8085 microprocessor is reset, the address bus contains

 0043H
 003CH
 002CH
 0000H

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

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

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