Fairlight: Routines

Address	Label	Description
B686	TITLE_PAGE_TEXT	Print the title page's words
C000	LOADING_TUNE	Play the loading tune until a key is pressed
C026	TUNE_NEXT_NOTE	Take a voice's next note
C033	TUNE_PITCH	Look up a note's pitch
C041	TUNE_RESTART_VOICE	Send a voice back to where it repeats from
C049	TUNE_PLAY_NOTE	Play one note of the loading tune
C47C	START	The game's first instruction
DFF2	MESS2	Print the closing lines of the quest
E038	SHOW_MESSAGE	Show a message under the room, and take it away again
E3E4	COMPOSITE_TO_SCREEN	Redraw a rectangle of the screen from an image, its mask and the clean copy
E4F7	ISO_MOVE	Move an object to a new position, and its sprite on the screen with it
E55B	DRAW_CURRENT_ROOM	Draw the room the knight is in
E597	DRAW_ROOM_RECORD	Draw a room from its record
E5BA	CLEAR_ROOM_SCREEN	Clear the screen
E5E8	DO_ROOM_COMMAND	Carry out one room command
E734	FILL_NEXT_SEED	Fill the next run of a flood fill
E7B2	FILL_NEXT_PIXEL	Paint one row of the textured fill, a pixel at a time, leftwards
E806	FILL_WHOLE_BYTE	Fill a whole byte at once when nothing in it needs looking at pixel by pixel
E834	FILL_BYTE_TO_LEFT	Move the fill's pointers a byte to the left
E849	PIXEL_ADDRESS	Find the screen byte of a pixel
E864	BUFFER_PIXEL	Find a pixel in the clean copy of the screen
E86E	SCREEN_PIXEL	Find a pixel's screen byte and its mask
E87D	PLOT_LINE_START	Plot the first pixel of a line
E89B	MORE_ROOM_COMMANDS	The room commands $C1-$E4: lines, mode bits, repeats, parts, the clean copy and $E4
EACC	PLACE_ROOM_OBJECTS	Put the object table's things for this room into its records
EB1A	PLACE_OBJECT	Make an object record from a type, a place and its template
EB4C	PLACE_FROM_TEMPLATE	Fill an object record from its template (PLACE_OBJECT continued)
EBEA	COPY_TO_RECORD	Copy bytes into an object record
EBF5	PRINT_CHAR	Print one character
EBFE	PRINT	Print the string after the call
EC3B	PRINT_FIND_GLYPH	Find a character in the font and print it (PRINT continued)
EC4C	SHOW_THING_IN_USE	Show a carried thing in the panel's box
EC75	CLEAR_THING_BOX	Clear the panel's box for the thing in use, and number it
ECBD	REDRAW_OBJECT	Redraw an object, and every other object that overlaps it
ED47	CULL_OBJECT	Sort one object into the redraw of a region: in front, behind, or out of it
EDB8	RECORD_FROM_NUMBER	Point IX at an object record by its number
EDC1	RECORD_FROM_NUMBER_STEP	The stepping loop of RECORD_FROM_NUMBER
EDC6	SORT_AND_DRAW_BEHIND	Put the objects behind in drawing order, and draw them into pages $DA and $DB
EE73	IS_IN_FRONT	Is this object in front of the other?
EE8D	DRAW_SPRITE	Draw an object's sprite into one of the region's buffers
EF4E	DRAW_SPRITE_SKIP_COLUMNS	Part of DRAW_SPRITE: move the buffer pointer to the sprite's first column
EF53	DRAW_SPRITE_CLIP_LEFT	Part of DRAW_SPRITE: a sprite that starts left of the region
EF6C	DRAW_SPRITE_ROWS	Part of DRAW_SPRITE: skip the bytes cut off at the left, then draw the rows
F036	FAR_CORNER	Find an object's far corner and floor
F04C	CLEAR_256_BELOW	Clear the 256 bytes below HL
F050	CLEAR_512_BELOW	Clear the 512 bytes below HL
F065	TITLE_SCREEN	The title, a game, GAME OVER, and round again
F0D2	WAIT	Wait for no key, then for a key
F0DF	INPUT	Read a row of keys
F0E6	IN31	Read the Kempston joystick, if it is in use
F0FB	ATTRI	Colour the whole screen in the room's colour
F10B	RESTOR	Copy the screen to the clean copy at LOADING_TUNE
F117	MIMAN	Turn the knight's sprites to face his way
F11F	MIWRAI	Turn the sprites of the state-11 creature to face its way
F127	MITRO	Turn the sprites of the state-7 creature to face its way
F157	MW	Mirror a run of sprite planes in place, if they face the other way
F199	FACING	Turn facing bits back into a direction, and find the view's sprite
F1B4	DECLI1	Take ten from LIFE
F1C8	DE1	Take a number from LIFE's two digits
F1E0	CHE3D	Update one object: the start of the dispatch on its state
F2F7	STEER	Keep a creature's course, or aim it at the knight when its count runs out
F309	CREATURE_UPDATE	Update an object by its state: guards, the troll, the wraith, the floating things and the knight
F4E6	SET_THING_ROOM	Write a thing's room into the object table
F4F4	PICK_UP	Pick up whatever the knight is standing at
F52A	PICK_UP_LOOK_ON	Look on for a thing that can be carried, and take it
F595	KNIGHT_CONTROLS	The knight's controls: walk, jump or fight, and the frames they show
F65C	ANIMATE_AND_MOVE	Show the frame, then move the object and redraw it
F7B0	WORKING_POSITION	Where the object being updated is
F7BA	WORKING_SIZES	How big the object being updated is
F7C4	BUMPED	Something is in the way: a door takes the knight through, anything else is met
F906	SAVE_OBJECT_POSITIONS	Write the room's things' positions back into the object table (the author's EEN)
F959	OBJECTS_MEET	Settle what happens when a moving object runs into one that is not a door
FA79	MOVER_VANISHES	Make the mover vanish where it stands
FA83	MEET_DECOY	Let a guard take a decoy, or else stop the part of a move that is blocked
FC07	STEP_ALONG_X	Step a position along x, if x is moving
FC1C	STEP_ALONG_Y	Step a position along y, the height, if y is moving
FC2B	STEP_ALONG_Z	Step a position along z, if z is moving
FC40	STEP_ALL_AXES	Step a position along every axis that is moving
FC48	ZOOMIN	Aim a chasing creature at the knight, or at a decoy (the author's ZOOMIN)
FC66	AIM_AT	Work out which way a chaser should go to reach its target
FC9C	TEST_OTHER	Test the mover's box, moved, against the record at IX only
FCA5	FIND_OBSTACLE	Find a record whose box overlaps a given box
FCDC	TEST_ONE_RECORD	Test a box against one record, unless it is the mover's own or hidden
FD20	ROOMST	Enter the room in ROOM, or end the quest (the author's ROOMST)
FE15	DRAW_STILL_THINGS	Draw a room's doors and still things into its picture, and start the main loop
FE47	MAIN_LOOP	The main loop: the keys between passes, LIFE, the message line and every object