What does this error message mean?

[keithv]

Thank you very much for that lesson, Richard. I really need to work on learning ASM.

I checked the amount of flash used on the previous version. It's at exactly 2k words with the inefficient PBP look up tables. The 16F684 has 2048 words, so I'm assuming the new modification added 135 words based on the error msg. Is switching the look up tables to ASM going to free up enough space?

Switching to a 16F1xxx chip would obviously solve the problem, as they have more flash and they are actually cheaper! The 16F1613 for example is almost $1.25ea. less. I have to upgrade my version of PBP, but it will pay for itself pretty quickly. So I think I'm going to do that regardless of whether or not I can cram it all into a 16F684. The most practical solution to my real problem is to make R44 an internal trimpot, but that will have to wait till the next production run of PCBs.

[richard]

Is switching the look up tables to ASM going to free up enough space?

easily , the one i completed saved 15 words at least all four would get another 30 or 40 i expect

replacing your readpot routine with this gets another 40 by eliminating that costly divide

readpot:
      adcin 1,x
    x=x*/151     '***************
return

[richard]

One other thing I notice is that the tables mostly have 152 members , x is always between 0 and 150 as far as i can see

the second table had 153 members , typo ?

[keithv]

One other thing I notice is that the tables mostly have 152 members , x is always between 0 and 150 as far as i can see

the second table had 153 members , typo ?

Yep. That was a typo. Thanks for catching that.

Thanks so much for helping me with this. Sorry for not getting back sooner. I was out for two weeks with Covid and then I got sidetracked by a bunch of year-end stuff. Anyhow...The program doesn't work because of some mistake I made in the new calibration routine. But I did swap out the look up tables with your new ASM tables in the original "verified" program and they work perfectly. And saved 25 words!

So now I've got to work on the calibration routine. I should be able to make it work in 47 words. After setting it aside for a while, I think I'm going to start over and come at it from a different angle.