Your podcast is great, please keep doing it.
Thanks! I have a very solid idea of who I want to have on next but I got sidetracked by life events and then by other projects so it’s been a while since the last episode. But it’s an important project that is dear to my heart and there will be more!
The black line in the corner of your screenshot there is a basically-unavoidable artifact of how HMOVE works and is called the “HMOVE comb”. If you look at Atari screenshots and pay attention you’ll see them everywhere. Activision had a policy of hiding the effect by ensuring that the first 8 pixels of every scanline were always black by strobing HMOVE on every scanline.
There is only a finite number of possible meanings for this sequence of bytes, so I’m sure someone can figure out why this works if they look at the code.
Additionally, someone created a 2600 game inspired by Shadow of the Beast.