199: Scrolling Control Right??

This sprite goes in pairs with 198. Each pair must have the same data and be at the same height. Each pair defines a vertical pan limit, so that if X mario Position is BETWEEN the two sprites, the camera will be restricted.

Sprite data

0000 YYUU 00D0

YY: The y pixels to move the limit. If it is an up limit, the limit will be moved upwards. If it is down, it will be moved down.
UU: I don't know what are those. They are sometimes set to 1. If i change it, it no longer works.

D: The direction of the limit. If 0, the camera cannot move lower. If 1, the camera cannot move higher