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Q:

What are software interrupts?

Answer

RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.

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Subject: Hardware

Q:

1. All beutiful things are sad.She is beutiful.She is sad

2. All nice things are flat.TV are flat.TV's are nice things

3. Potatoes are stems.All stems are fruits.Potatoes are fruits

 

Choose the alternative where the 3rd segment can be deduced from above two

A) 1 only B) 1 and 2
C) 3 only D) 1 and 3
 
Answer & Explanation Answer: D) 1 and 3

Explanation:
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Filed Under: Verbal Reasoning - Mental Ability

Q:

Name 5 different addressing modes?

Answer

Immediate, Direct, Register, Register indirect, Implied addressing modes.

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Subject: Hardware

Q:

what is the clock frequency for 8085?

Answer

3MHz is the maximum clock frequency for 8085.

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Subject: Hardware

Q:

What is the RST for the TRAP?

Answer

RST 4.5 is called as TRAP.

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Subject: Hardware

Q:

Can RC circuit be used as clock source for 8085?

Answer

Yes, it can be used, if an accurate clock frequency  is not required. also the component cost is low compared to LC or Crystal.

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Subject: Hardware

Q:

Can 8259 he interfaced with 8085 via the trap pin?

Answer

Yes... so if 8529 gives interrupt then it will be serviced immediately but since INTA pin is left hanging the INSR bit will never be set.. and so whenever my interrupt occurs depending upon priority it will be serviced.. also the ISR address for all interrupts will be same ie 0024H..


Interrupt via trap is nonmaskable, so it will be serviced immediately.

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Subject: Hardware

Q:

Why the temporary registers W and Z are named so i mean we start from A, B, C, D, E then H and L coz H stands for higher bit and L for lower bit of the address pinted by memory pointer.. but wats W and Z for?

Answer

As W and Z alphabets are not widely used similarly as W and Z is internally used they would have been named so

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Subject: Hardware