I believe I disabled the C64 cap on your 7800 to improve 2600 game and home brew compatibility. For instance the bus stuffing techniques should work on it. There are two games that I know can be affected by this. One of them I tested with yours afterwards and it still worked. That game being the 2600 version of Dark Chambers. That is usually the main game that no longer works when disabling the extra timing circuit, but on yours that game still worked properly. However, another game that seems t