Intel 8085 Question:

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Can 8259 be interfaced with 8085 via the trap pin?

8085 Interview Question
8085 Interview Question

Answer:

i think yes...so if 8259 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 ny interrupt occurs depending upon priority itt 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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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 nd L for lower bit of the address pinted by memory pointer....but wats w and z for?Why address bus is unidirectional and data bus is bidirectional?