Inc16 Help

[nathan613]

I tried doing it all in one line, since Add16 should take care of the 16 bits.
My code:
Add16(a=in, b[0]=true, b[1..15]=false, out=out);

I got "comparison error".  I tried variations on this, but no help.
Please enlighten me!

[cadet1620]

Your implementation of Inc16 is correct.

The problem must be with your Add16.
You can confirm this by renaming your Add16.hdl to something like Add16.hdl.x to force the simulator to use its built-in Add16.

One other thing to check, since you didn't indicate what line is failing to compare. Double check that you are loading the Inc16.tst file form the same directory where your Inc16.hdl is. I've made that mistake way too many times of the years :-(

--Mark

[nathan613]

Thanks - it was indeed the Add16. I was doing, for ex.,  sum=sum[4] when I now realize it should have been sum= out[4]. I changed it, and Inc16 works fine.

[cadet1620]

If your bad Add16 was passing the Add16.tst, I'd be curious to see it.  I might be able to to fix the test to catch that class of problems.

--Mark