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Microprocessor

Microprocessor
In one’s complement 8 bit representation 11111111 represents

-1
-0
+0
1

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Microprocessor
Because we wish to allow each ASCII code to occupy one location in memory, most memories are __________ addressable.

BYTE
NIBBLE
WORD (16 bits)
DOUBLEWORD (32 bits)

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Microprocessor
XCHG instruction exchanges the content of H-L with ______ register pair.

 Stack Pointer
 B-C
 D-E
 PSW

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Microprocessor
The stack is nothing but a set of

 reserved ROM address space
None of these
 reserved I/O address space
 reserved RAM address space

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Microprocessor
In order to save accumulator value on the stack, which of the following instruction may be used

 POP PSW
 PUSH SP
 PUSH A
 PUSH PSW

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Microprocessor
________used to implement the hardware interrupts (RST 7.5, RST 6.5, RST 5.5) by setting various bits to form masks or generate output data via the Serial Output Data (SOD) line.

 DI
 RIM
 SIM
 EI

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