I still don't know the answer.

You said your instructor would fail you if he could make LS96 shift left. Did he show you how he could do it with no additional logic?

LS96 cannot shift left without additional logic.

 

Yup, no sir, he didn't show us, he just said that it can shift left without adding another circuitry.

 

Yup, no sir, he didn't show us, he just said that it can shift left without adding another circuitry.

Ask him for the solution.

I don't see how it can be done without external circuitry. You need to connect the outputs to the parallel inputs, but the LS96 parallel inputs are preset only. You can't "parallel" load a zero.

 

Ask him for the solution

Okay sir, I'll inform you once I know the answer. Thank you for all the help.