Armor percentage rollover

In versions of Doom prior to v1.2, armor percentage was not limited to 200%. Since the ARMOR count in the status bar has only three digits, the display can wrap around to 0% if enough armor bonuses are picked up.

The true maximum for the armor percentage is probably defined by the static limit on lump size in a PWAD; a map can contain only so many Things, and therefore only so many armor pickups.