The Hobbit: Routine at 7B78

Used by the routines at PARSE_ACTION and WOULD_WORK.

Four flags, from PATTERN_FLAGS. NEEDS_LIGHT: the action needs light at all -- set for every hands-on action, TAKE, OPEN, EXAMINE, LOOK and INVENTORY among them, which DO_ACTION refuses in the dark ("i see nothing here."), where the rest can still be done to what the actor carries. TARGET_IS_PLACE: the first object is a place, not a thing -- ENTER and GO INTO. INSTRUMENT_IS_PLACE: the same for the second object, set by no action in the game. PATTERN_OPTION: TAKE OFF, FOLLOW and JUMP ONTO, used by the object matching at NEXT_INSTRUMENT and not yet worked out.

Used by the routines at PARSE_ACTION and WOULD_WORK. Four flags, from PATTERN_FLAGS. NEEDS_LIGHT: the action needs light at all -- set for every hands-on action, TAKE, OPEN, EXAMINE, LOOK and INVENTORY among them, which DO_ACTION refuses in the dark ("i see nothing here."), where the rest can still be done to what the actor carries. TARGET_IS_PLACE: the first object is a place, not a thing -- ENTER and GO INTO. INSTRUMENT_IS_PLACE: the same for the second object, set by no action in the game. PATTERN_OPTION: TAKE OFF, FOLLOW and JUMP ONTO, used by the object matching at NEXT_INSTRUMENT and not yet worked out.
PATTERN_OPTIONS	7B78	LD A,(FLAGS_LAST_WORDS)	NEEDS_LIGHT: needs light
	7B7B	AND $40
	7B7D	LD (NEEDS_LIGHT),A
	7B80	LD A,(FLAGS_FIRST_WORDS)	PATTERN_OPTION
	7B83	LD B,A
	7B84	AND $01
	7B86	LD (PATTERN_OPTION),A
	7B89	LD A,B	TARGET_IS_PLACE: the first object is a place
	7B8A	AND $80
	7B8C	JR Z,PATTERN_OPTIONS_0
	7B8E	LD A,$01
PATTERN_OPTIONS_0	7B90	LD (TARGET_IS_PLACE),A
	7B93	LD A,B	INSTRUMENT_IS_PLACE: the second is
	7B94	AND $40
	7B96	JR Z,PATTERN_OPTIONS_1
	7B98	LD A,$01
PATTERN_OPTIONS_1	7B9A	LD (INSTRUMENT_IS_PLACE),A
	7B9D	RET