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Microprocessor

Microprocessor
Register pair used to indicate memory

 W and Z
 D and E
 B and C
 H and L

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Microprocessor
The number of interrupt lines in 8085 is

3
4
2
5

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Microprocessor
The 8085 microprocessor uses a crystal of frequency 6.25 Mhz. The T-state value is

 320ns
 1280ns
 640ns
 960ns

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

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

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Microprocessor
In 8085 which addressing mode is also called inherent addressing?

Register
Direct
Implicit
Immediate

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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 PSW
 PUSH A
 PUSH SP

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