0E, 0F: DA44 (seconds of game time, will eventually fall through to similar addresses as Yellow)
In Pokémon Yellow
Methods of obtaining invalid C109 values
Arbitrary code execution (also applies to Red/Blue)
Yellow MissingNo.: When its front sprite does not freeze the game, it can give the player an invalid C109 value after battle, which varies heavily, and may not be emulated correctly on older emulators. If the player encounters Yellow MissingNo. (non-ghost/fossil form) in Viridian Forest, previously erased the save file with Up+Select+B and has never encountered a glitch Pokémon before, the Yellow MissingNo. will not freeze the game on real hardware or emulators that provide the correct behavior (BGB included).