30543: Check whether a character is on the top, middle or bottom floor
Used by the routines at 30555, 30706, 57893, 64077 and 64416. Returns with the zero flag set if and only if the character is exactly on the top, middle or bottom floor.
H
Character number (206, 207, 210, 214)
30543
LD L,2
Byte 2 of the character's buffer holds his y-coordinate