I think it's high time to put a tiny blurb out in remembrance of (the sadly late) Bob Bishop's APPLE-VISION for the Apple II.

It was written in INTBASIC, of course. But it also took advantage of at least two major parts of the then-optional Programmer's Aid #1 (and unfortunately, only) ROM Apple II users could buy to put in the otherwise-vacant D0 socket. So this had not just high-res graphics and sound, but other tricks, such as TEXT on the hi-res screen (hi-res char generator).

It also showed how hi-res shapes would look (this post's icon is of the guy on TV).