Consider the 8085 instruction IN 09H stored as follows:
Memory Address |
Machine Code |
3050
3051
|
DA
09
|
and the following incomplete timing diagram for the instruction:
- Write the contents of the boxes, A, B, C and D in hexadecimal in your answer sheet. Do not draw any pictures.
- Write the state of both ALE and $\overline{RD}$ pins at time units T1, T2, T3 and T4.
- How do you generate the signal that tells the peripheral to put the data on the bus? Answer by completing the following statement in your answer book:
By combining signals.........