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Microprocessor

Microprocessor
How many bytes in a zero memory page should be reserved for vectors used by RST instructions?

 16.
 32.
 64.
 128.

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Microprocessor
An I/O processor controls the flow of information between

Two I/O devices
Cache and main memory
Cache memory and I/O devices
Main memory and I/O devices

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Microprocessor
A sequence of two registers that multiplies the content of DE register pair by two and stores the result in HL register pair (in 8085 assembly language) is

 XCHG & DAD H
 XTHL & DAD H
 PCHL & DAD D
 XCHG & DAD B

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Microprocessor
SPHL instruction copies the content of H-L register pair to the _________.

 Stack Pointer
 PSW
 B-C
 D-E

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Microprocessor
‘Burst refresh’ in DRAM is also called

Concentrated refresh
None of these
Distributed refresh
Hidden refresh

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Microprocessor
Identify the non-maskable interrupt from the following

 RST 7.5
 RST 4.5
 RST 6.5
 RST 5.5

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