A quick fix to the earlier release, correcting:
- a bug in the TIA that could cause border-period motion events to occur prematurely†; and
- an incomplete adaptation of the 6502 to its slightly improved multiple bus listener semantics, that was causing issues with Atari titles that execute code from the RIOT's RAM.
† most visibly, causing horizontal blocks of colour on the left margin in Pitfall 2 and Double Dragon, though I'm still not 100% sure that what's happening now is correct, it's clearly more correct.