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?
Correct Answer: In case of Move A to B it will move whatever the value of A into BIt mean it will move numeric, alphanumeric and alphabatic value In case of COMPUTE B=A it will assign the value of A into B But in case of compute only numeric value will be compute
Correct Answer: Object Repository means not a collection of objects it's a common repository for all the people (testing, developers) for seeing all the data in single login for example QA wants to see 5 testers works then he goes to each person login and see the data It's very difficult job for this we can use Object Repository
Correct Answer: Micro processor is a program-controlled device, which fetches the instruction from memory, decodes and executes the instructions Most Micro Processor are single-chip devices
5. What are the minimal cost and minimal risk solution?
Correct Answer: In binary representation there are some states that believed to be never occurred due to some particular functionality of a given circuit If zero output is assigned to such states then it is called minimal risk solution as we are resetting the formidable states which could be occurred accidentally Another approach is to assigned a don't care to them so it results in lesser logic and hence is called minimal cost solution
6. Can RC circuit be used as clock source for 8085?