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Microprocessor

Microprocessor
DMA signal/signals in 8085 is/are

 HLDA.
 All.
 READY.
 HOLD.

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

 D-E
 PSW
 Stack Pointer
 B-C

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Microprocessor
The program counter in a 8085 micro-processor is a 16-bit register, because

 It has to fetch two 8-bit data at a time
 It facilitates the user storing 16-bit data temporarily
 There are 16 address lines
 It counts 16-bits at a time

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Microprocessor
At the beginning of a fetch cycle, the contents of the program counter are

 transferred to memory data register.
 incremented by one.
 transferred to address bus.
 transferred to memory address register .

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Microprocessor
An 8-bit microprocessor can have ………….. address lines.

 16
 8
 cannot be predicted
 32

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Microprocessor
The stack pointer

 resides in RAM
 resides in ROM
 may be in RAM or ROM
 resides in microprocessor

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