Comment by musicale

Semi-OT but from the same site: I always wondered if you could race the beam and/or interlace on older microcomputers. Apparently you can:

http://48k.ca/128x192.html

http://48k.ca/ball.html

https://github.com/hallorant/bigmit/tree/master/ta19demo

[Apparently the hardware was modified slightly with an extra wire/signal for vertical retrace detection, and this modification is supported in the emulator as well.]