The Hobbit: Routine at 84B9

84B9: Wait for all keys up, then for one down

Used by the routines at DO_PAUSE and DO_SAVE.
NEW_KEYPRESS	84B9	XOR A
	84BA	IN A,($FE)
	84BC	AND $1F
	84BE	CP $1F
	84C0	JR NZ,NEW_KEYPRESS
NEW_KEYPRESS_0	84C2	XOR A
	84C3	IN A,($FE)
	84C5	AND $1F
	84C7	CP $1F
	84C9	JR Z,NEW_KEYPRESS_0
	84CB	RET