It was impractical and didn't work on every Apple II+. IIRC peripheral cards loading the bus could cause it not to function and for instance some clones also d

It was impractical and didn't work on every Apple II+. IIRC peripheral cards loading the bus could cause it not to function and for instance some clones also didn't work. It was fully documented in Jim Sather's Understanding the Apple II where it described the technique and even gave examples. After reading that as a kid I experimented with it but I never felt like I would use it because it was so awkward to incorporate into a real game plus it wouldn't work on every system.