I'm assuming you meant "horizontal blanking interval" instead of "vertical blanking interval". But I don't think that's entirely correct either. Some games wi

I'm assuming you meant "horizontal blanking interval" instead of "vertical blanking interval". But I don't think that's entirely correct either. Some games will change the registers while the beam is actively drawing so that, e.g., the left half of the line will be drawn with one set of settings and the right half drawn with another.