Hi,
I did a new article speaking of crtc type detection.
As i need a little and fast crtc type detection for Swingin' intro and One Screen Colonies #2 cracktro, i did a piece of code which wil do it easily.
Just Read it : Tiny Crtc Detection (https://amstradplus.forumforever.com/t685-Tiny-Crtc.htm#p7149) [French only].