Any known bugs in the MOS 6561 to exploit for demo effects?

[nanoflite]

Hi,

It seems the VIC-II in the C64 has some very nice bugs that enables it to do more than it actually should be capable off... I'm thinking about opening the borders etc... Do we know of similar quirks for the 6560/6561 that have been used in a demo effect?

Cheers,
Johan

[mathop]

This one springs to mind (a bit old)
http://www.zimmers.net/anonftp/pub/cbm/ ... ntiers.txt
The author (Viznut) also made the famous (?) "Impossiblator 3" demo.

Some bits were discussed here recently (well some years ago now
viewtopic.php?p=115674#p115674

[nanoflite]

Nice! Thank you!

Yes, the "impossibilator 3" is a great example