Everyone's A Wally: Routine at B197

B197: Drop the current character's height down one notch up to floor level

Used by the routines at A92C and B09F.
B197	LD A,(IY+$0A)	Get the Y co-ordinate.
B19A	ADD A,$04	Add 4 to it to drop down one level.
B19C	CP $98	Set the maximum Y co-ordinate to 98 so they can't drop below floor level.
B19E	JR C,$B1A2
B1A0	LD A,$98
B1A2	LD (IY+$0A),A	Store the new Y co-ordinate and return.
B1A5	RET	Store the new Y co-ordinate and return.