HALF TIME. The hockey break is in the code (p07:8367), but the exact moment it is triggered has not been checked.
The SRAM commands. The directory (5) and the formatting (0x0C and 0x0D) are known; the rest of the table at p04:866E is read but not run.
The disk. Saving screens, games and ranking could not be tried without a disk.
With a game next to it. The GAME and MODIFY menus, the ranking and the display screen need a game plugged in; their texts are on The texts, but their screens have not been drawn.