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1. Consider the program segment written for 8085 based system: LXI S, FFFFH MVI A, 00H MVI B, 0FH SUB B CNC GOLOC MVI A, FFH where in the program subroutine labelled ''GOLOC'' introduces delay of 28 T-states only. How many T-states are required to execute above program statement?





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  • By: guest on 02 Jun 2017 12.55 am
    Since carry (CY) flag will not be set at the execution of "SUB B" instruction; check for CY flag fails but this requires 9(= 6 OP - CODE FETCH + 3T - states) T-states ∴ Total T-states = 10 + 7 + 7 + 4 + 9 + 7 = 44.
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