Unknown Comparison Failures (Example DMux)

[Hoho13]

On the third comparison it sets in = 1 and sel = 0. The notSel bit is evaluated to 0 and the in and notSel are AND'd and the output equals 0 on the a output pin, it should equal 1.

[cadet1620]

Your DMux implementation is correct. Your Not appears to be functioning correctly from the screen shot. There is likely to be a problem with your And. Make sure that And.tst is still passing.

One thing to try is to create a subdirectory under projects/01 and copy only the DMux files into it. If the test passes in that subdirectory, the you know the problem is with one of the chips in the projects/01 directory.

If you can't find the problem, send me a .zip or .rar of your entire projects/01 directory and I'll take a look at it.

--Mark

[Hoho13]

Thank you so much.
It was from project 0 where I had done And and Or and didn't have them in the project 01 folder. Once moving those to the folder the problem is now resolved.

[cadet1620]

Glad you got it working.

Please edit your post to delete the screen shot and working HDL. We don't want working implementations remaining on the forum.

Thanks,
--Mark