In order to better understand the paging of 12 and 16KB games with videopac + graphics, and to be able to include those games in my "Videopac micro-SD cart", I have reverse engineered one of these cartridges.
The following games fall into this group:
- 55+ Neutro Star
- 58+ Air Battle
- 59+ Helicopter Rescue
- 60+ Trans American Rally
Any of those games can serve my purpose as they all use the same type of pagination.
In general they are rare games and they are expensive to acquire, so I have bought the most affordable of all which is the 55+ Neutron Star.
After following the ways with the multimeter I have reached the following diagram: