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  • Question
  • Can 8259 he interfaced with 8085 via the trap pin?


  • Correct 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 


  • Hardware problems


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    • 1. 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?
    • Discuss
    • 2. What is the logical difference b/w Move A to B and COMPUTE B=A?
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    • 3. What is object repository?
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    • 4. What is microprocessor?
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    • 5. What are the minimal cost and minimal risk solution?
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    • 6. Can RC circuit be used as clock source for 8085?
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    • 7. What is the RST for the TRAP?
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    • 8. what is the clock frequency for 8085?
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    • 9. How many interrupts are there in 8085?
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    • 10. Name 5 different addressing modes?
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