This is awesome, mdmetzle. After you fix the bug, I'd love to show a video and make this available for download on the Hackvision site's game page.
Some clarity on a confusing issue: the only reason I used a particular version of TVout for Hackvision is that the preloaded games (Space Invaders/Pong) takes up a lot of SRAM, and the older version of TVout I used was a little slimmer. The current/newest builds of TVout certainly work on the Hackvision hardware (which is what mdmetzle did I think).