Thanks for sharing

What is the best resource for serious Commodore 64 programming? Assume that serious programming on the Commodore 64 is not done in BASIC V2 that ships with the Commodore 64. I feel like most of the knowledge is tied up in old books and not available on the internet. All that I have found online are ...

I know this question is very spesific question but I know there are some c64 code gurus around here. So, here is my question.

When I try to disable screen using $d011 trick, upper/lower border also opens. I want to do that without opening upper/lower borders. Is it possible?