How do I show sprites in the border on C64?

Question

I\'ve seen cool C64 demos showing sprites in the border area of the screen. It shouldn\'t be possible; I think they managed to fool the graphics chip somehow. How exactly di

Answer 1

That is a long time ago.

I know there was a solution that relied on the frequency of the monitor.

With a CRT, the current pixel is known even if it was outside of the normal screen. So you could manipulate the ray.

Somewhere in my junkpile there must be some C64 books.

Offtopic, but graphics with the VIC20 (the predecessor of the C64) was fun. There was no way to manipulate each pixel, but you could change the existing characters. So you filled the screen with all characters from 0 to ... and changed the characters to set pixels to the screen. ;-).