I cleaned it up for you. No warnings left and added some comments to help you debug it.
Good luck!

goodness,, how incredibly sweet of you!! thank you so much ;-;

 

See the note in #20 about ADCON1.
I edited it after you saw it I think.

 

See the note in #20 about ADCON1.
I edited it after you saw it I think.

noted, thank you again ^^

 

@DonutChan

Upon reading your recently closed thread here. I occurred to me that your opening sentence could be read two ways,

I had my piano program successfully work on PIC16F84A, but when i took the same program with the same wiring to another PIC(Pic16F877) on Proteus...

Did the 16F84A work on the real piano or just on Proteus? How was its sound quality?

 

@DonutChan

Upon reading your recently closed thread here. I occurred to me that your opening sentence could be read two ways,


Did the 16F84A work on the real piano or just on Proteus? How was its sound quality?

Ah.. all on ISIS for now. the sound quality on isis was pretty bad

 

@DonutChan

Upon reading your recently closed thread here. I occurred to me that your opening sentence could be read two ways,


Did the 16F84A work on the real piano or just on Proteus? How was its sound quality?

but it was definitely enhanced.. just not perfect yet