Heh yeah, I spent a silly amount of time writing my own bitblts for the thing as a kid. I think the //e version of one of the books mentioned in the video (Unde

Heh yeah, I spent a silly amount of time writing my own bitblts for the thing as a kid. I think the //e version of one of the books mentioned in the video (Understanding the Apple ][) is where I first learned of vertical retrace/blank.