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Microprocessor

Microprocessor
In one’s complement 8 bit representation 11111111 represents

-0
-1
+0
1

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Microprocessor
In microprocessor based system DMA refers to

None of these
 direct memory access for microprocessor
 direct memory access for the I/O device
 direct memory access for the user

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Microprocessor
After RESET 8255 will be in

 mode 2
 mode 0; all ports are input
 unchanged condition
 mode 0; all ports are output

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Microprocessor
What is SIM?

 None of these.
 Select interrupt mask.
 Sorting interrupt mask.
  Set interrupt mask.

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Microprocessor
While STC instruction executes,

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

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Microprocessor
The data lines of 8085 microprocessor are multiplexed with

 lower order address lines
 higher order address lines
None of these
 status lines

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