Monthly Archives: June 2021

Found some copy protection code in Joust

Posted on June 23, 2021 by nowhereman999

There is some tricky copy protection used in Joust to stop anyone tampering with the code. I just wanted to document it here just in case anyone wants to learn about it. I was playing around with the Joust code … Continue reading →

Posted in CoCo Programming, Emulation | 7 Comments

CoCo 3 Demo of the scan line technique described in the previous post

Posted on June 8, 2021 by nowhereman999

This demo shows that you don’t need to double buffer the screen if you know where the scan line is. You can draw your sprites where the scan line is not drawing. I’ve posted the source to my GitHub link … Continue reading →

Posted in Uncategorized | 10 Comments