| Routines

71DC: Make a teacher wipe a blackboard (1)

The address of this interruptible subcommand routine is placed into bytes 0x69 and 0x6A of a teacher's buffer by the routine at 7D30.
Input
H | Teacher's character number (0xA3-0xA6)
71DC | CALL $7128 | A=identifier of the blackboard the teacher is next to
71DF | JR $71E8 | Jump over the unused code remnants at 71E1 (which apparently would have made the teacher skip wiping the board if it was already clean)