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Microprocessor

Microprocessor
Using one 8259 IC is equivalent to providing …………. INTR pins on 8085

 12
 18
 8
 16

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Microprocessor
Identify the non-maskable interrupt from the following

 RST 4.5
 RST 7.5
 RST 6.5
 RST 5.5

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

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

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

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Microprocessor
A microcomputer consists of

All of these
 I/O device
 a microprocessor
 memory

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Microprocessor
Identify the programmable DMA controller from the following

 8253
 8251
 8257
 8279

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