This presentation of "A Pig Quest" for the C64 describes similar methods for efficient bitmap copying (the timestamped part is more relevant, but I recommend wa

This presentation of "A Pig Quest" for the C64 describes similar methods for efficient bitmap copying (the timestamped part is more relevant, but I recommend watching the entire thing): https://youtu.be/I8CTKeh8N0Q?t=578 https://youtu.be/I8CTKeh8N0Q?t=578