Routines

Address	Label	Description
6300	ENTRY	Where the BASIC loader enters the game
A631	START	Start the game
A647	AFTER_GAME	Back to the menu after a game, set up a game, and run it
A6C0	OBJECT_DONE	After each object's update routine; the end of a turn
A749	COLOUR_PANEL	Colour the screen and the panel for the room
A7A3	PRINT_CHAMBERS	Print the count of chambers activated
A7AE	COLOUR_CLOCK_BOX	Colour the light-years box
A7DC	CLEAR_WIPE_FLAGS	Clear every object's wipe flag
A8F0	NO_UPDATE	An update routine that does nothing
A8F1	R_CHECK_LEFTOVER	A leftover that returns at once
A8F9	LEAPER	A leaper (graphic 130)
A95A	SCENE_ROBOT_TOP	The robot's top in the ending (graphic 93)
A971	OILED_ROBOT	The robot being oiled, in the ending (graphic 92)
A9B1	FRAGILE	A thing that breaks when moved (graphic 129)
A9C7	REMOTE_ROBOT	A remote-controlled robot (graphics 124 to 127)
AA4D	REMOTE_PAD	The remote-control pad (graphic 128)
AA63	REMOTE_BUTTON	A remote-control button (graphics 122 and 123)
AA89	SLOW_CHASER	A thing that homes in on the player (graphics 120 and 121)
AAA1	CLOCKWORK_MOUSE	A clockwork mouse (graphics 116 to 119)
AB1F	FACE_BY_STEP_UNUSED	Unused: face by the signs of the steps
AB61	SCENE_TOOL	A tool in the re-programming (graphics 81 to 83)
ABF5	SCENE_SPARKS	The sparks over the robot (graphic 80)
AC6B	SUMMARISE_CHAMBERS	Count the chambers and the cryonauts for the summary
AD13	CEILING_DROP	A thing that drops from the ceiling (graphic 73)
AD54	THUD_ON_LANDING	A thud, once, when it lands
AD66	RUN_CLOCK	Count down the light years, and show them
ADB0	PRINT_ROLLING_DIGIT	Print a digit rolled
ADC9	CLOCK_BORROW	Take a light year off
ADE5	ROLL_CLOCK	Roll the clock's digits a row
ADF3	SET_WIPE_AND_DRAW_IY	Mark the object at IY to be wiped and redrawn
AE03	FIND_GRAPHIC_HERE	Find the room's first object with a graphic in a range
AE17	WANTED_VALVE	The picture of the valve a socket wants (graphics 104 to 107)
AE33	SOCKET_SPARKLE	A socket's sparkle (graphics 108 to 111)
AE5D	SEATED_VALVE	A valve seated in its socket (graphics 100 to 103)
AE68	SOCKET	A chamber's socket (graphics 112 to 115)
AE81	ANY_SPECIAL_HERE	Is anything lying in the room from the places?
AE8A	CALC_PIXEL_XY_IY	Project the object at IY onto the screen
AE96	CRYONAUT	A frozen cryonaut (graphic 74)
AE99	FIND_SPECIAL_OBJS_HERE	Bring in what lies in the room from the places
AF05	UPDATE_SPECIAL_OBJS	Write the valves in the room back to their places
AF3F	INIT_SPECIAL_OBJECTS	Deal the valves and the extra lives to their places
AF79	LOOSE_VALVE	A valve (graphics 96 to 99), and activating a chamber
B055	LOWER_HALF	The update routine for the lower half of a two-part creature (graphic 11)
B06B	WANDERER	The update routine for a creature that wanders at random (graphics 94 and 95)
B0AD	TURN_QUARTER	Turn a creature a quarter
B0DD	TURN_QUARTER_BACK	Turn a creature a quarter the other way
B0E7	STEP_FROM_FACING	Set a creature's step from the way it faces
B110	PACER	The update routine for a creature that paces to and fro (graphics 86 and 87)
B165	MOVE_TOWARDS_PLAYER	Point an object at the player
B185	TOGGLE_FRAME	Flip between an object's two frames
B18C	NEXT_FRAME_MOD4	Step an object through four frames
B19C	SPARK_CHASER	The update routine for the thing that chases the player (graphics 76 to 79)
B1AE	FACE_ALONG_STEP	Turn a creature to face the way it is stepping
B1E5	PUT_UNDER_UPPER	Put a lower half under its upper half
B1FA	JOIN_HALVES	Make a two-part creature one box for its move
B20B	PART_HALVES	Part a two-part creature again after its move
B21C	SHUTTLE_V	The update routine for a block that shuttles to and fro in V (graphic 67)
B224	SHUTTLE_U	The update routine for a block that shuttles to and fro in U (graphic 66)
B267	CONVEYOR_PLUS_V	The update routine for a conveyor that carries things forwards in V (graphic 68)
B27A	CONVEYOR_PLUS_U	The update routine for a conveyor that carries things forwards in U (graphic 69)
B280	CONVEYOR_MINUS_V	The update routine for a conveyor that carries things back in V (graphic 70)
B286	CONVEYOR_MINUS_U	The update routine for a conveyor that carries things back in U (graphic 71)
B28C	COLLAPSING_BLOCK	The update routine for a block that collapses when landed on (graphic 45)
B29F	STILL_DEADLY	The update routine for things that kill but never move (graphics 72 and 75)
B2A4	SPIKES	The update routine for the spikes (graphic 46)
B2B0	DEADLY_AND_DRAW	Make an object deadly both ways, and redraw it
B2B6	DROPPING_BLOCK	The update routine for a block that sinks while something stands on it (graphic 44)
B2D9	SAVE_UVZ	Keep an object's position
B2EB	SAME_UVZ	Is an object where it was?
B2FF	PUSHABLE	The update routine for a block that can be pushed (graphic 28)
B31A	PUSHABLE_INVERTED	The update routine for the other block that can be pushed (graphic 29)
B31F	LIFT	The update routines for the lift (graphic 47) and the bobbing block (graphic 31)
B39A	START_SPARKLE	Start the sparkle an object vanishes in
B3A4	SPARKLE_STEP	The update routine for a frame of the sparkle (graphics 48 to 54, and 64)
B3B0	SPARKLE_END_PLACE	The update routines for the last frame of a sparkle (graphics 65 and 55)
B4A1	PLAY_TUNE_ONCE	Play the menu's tune, once, until a key is pressed
B4BA	PLAY_TUNE	Play the tune at DE
B4C5	PLAY_NOTE	Play one note
B5EE	SPARKLE_SOUND	The sparkle's sound
B604	MATERIALISE_SOUND	The sound of the robot materialising
B619	THUD_SOUND	The sound of a thud
B62C	JUMP_SOUND	The sound of a jump
B63C	BEEP_BY_Z	A note pitched by an object's Z
B64A	BEEP_BY_U	A note pitched by an object's U
B64F	BEEP_BY_V	A note pitched by an object's V
B654	BEEP_BY_UVZ	A note pitched by an object's position
B65F	TRANSFORM_SOUND	Unused: Knight Lore's werewolf sound
B676	CRASH_SOUND	The sound of a crash
B690	WARBLE_SOUND	A warble for the remote-controlled robots
B6B1	PLAIN_BEEP	A plain beep: 16 waves at half-wave count 128
B6B6	PAUSE_BEEP	A beep: 24 waves at half-wave count 80
B6BB	HIGH_BEEP	A beep: 32 waves at half-wave count 48
B6C0	LOWER_HALF_STEP	A footstep for a creature's lower half
B6CE	FOOTSTEP	The robot's footstep
B702	CLICK	One wave
B712	DO_ANY_OBJS_INTERSECT	Does this object overlap any other?
B74D	IS_OBJECT_NOT_IGNORED	Does this object take part in collisions?
B759	READ_KEYS	Read a half-row of the keyboard
B761	GAME_ENDED	The game is over
B804	SET_UP_SCENE	Put the scene's objects in the object records
B863	MARK_ROOM_SEEN	Mark the robot's room as seen
B881	COUNT_ROOMS_SEEN	Count the rooms seen
B899	WAIT_KEY_OR_TIME	Wait for a key, or for a while
B8A9	ARRIVAL_SCREEN	The game is won: the arrival screen
BA36	PRINT_SUMMARY_COUNTS	Print the summary's three counts
BA57	PRINT_LIVES	Print the number of lives
BA7E	MENU	The menu
BAFB	FLASH_MENU	Flash the chosen lines on the menu
BB9D	PRINT_TEXT_SINGLE_COLOUR	Print a string in one colour
BBB1	PRINT_TEXT	Print a string whose first byte is its colour
BBEB	PRINT_CHAR	Print a character into the screen buffer
BC15	TOGGLE_SELECTED	Flash one of B attributes, and steady the rest
BC1C	FLASH_NEXT_ONE	The rest of TOGGLE_SELECTED
BC25	DISPLAY_MENU	Draw the menu
BC56	MULTIPLE_PRINT_SPRITE	Draw a sprite several times in a line
BC70	PLAYER_APPEARING	The update routine for the robot appearing (graphics 56 to 62)
BC83	PLAYER_APPEARED	The update routine for the robot's last frame of appearing (graphic 63)
BC9D	SHOW_CARRIED	Show the carried things on the panel, if they have changed
BD58	CHK_PICKUP_DROP	Is the pick-up control pressed?
BD6B	TAKE_OR_LEAVE	Pick up, or put down
BEA7	CAN_PICK_UP	Can this thing be picked up?
BED6	IS_OBJ_MOVING	Is the object moving?
BEE0	EXTRA_LIFE	The update routine for an extra life (graphic 12)
BF2F	BLIT_2X8	Copy a 16 by 8 pixel patch from the buffer to the screen
BF3D	DRAW_AT_L16_D9	Drawing nudge X -16, Y -9 (graphic 30)
BF47	DRAW_AT_L12_D8	Drawing nudge X -12, Y -8
BF4C	DRAW_AT_L16_D7	Drawing nudge X -16, Y -7
BF51	DRAW_AT_L12_D7	Drawing nudge X -12, Y -7 (graphic 13)
BF56	DRAW_AT_L16_D6	Drawing nudge X -16, Y -6
BF5B	DRAW_AT_L12_D6	Drawing nudge X -12, Y -6
BF60	DRAW_AT_L12_D5	Drawing nudge X -12, Y -5
BF65	DRAW_AT_L8_D5	Drawing nudge X -8, Y -5 (graphic 15)
BF6A	DRAW_AT_L12_D4	Drawing nudge X -12, Y -4
BF6F	DRAW_AT_L16_D3	Drawing nudge X -16, Y -3
BF74	DRAW_AT_L4_D3	Drawing nudge X -4, Y -3 (graphic 14)
BF7E	DRAW_AT_L8_D2	Drawing nudge X -8, Y -2
BF83	FILL_BOX	Fill a box of bytes, B wide and C rows high, with A
BF97	FILL_BOX_STORES	The eight stores of FILL_BOX
BFAB	SET_WIPE_AND_DRAW_FLAGS	Mark an object to be rubbed out and redrawn
BFB6	DEC_DZ_AND_UPDATE_UVZ	Fall, and move
BFD8	SECOND_PILLAR	The update routine for the second pillar of a doorway (graphic 3)
BFEA	FIRST_PILLAR	The update routine for the first pillar of a doorway (graphic 2)
C050	NUDGE_ALONG_V	Nudge along V
C069	NUDGE_ALONG_U	Nudge along U
C082	CHK_PLYR_NEAR_ARCH	Is the robot in the doorway?
C099	IS_NEAR_TO	Is an object near a point?
C0BE	PLAYER_LEGS	The update routine for the robot's legs (graphics 16 to 23)
C117	CHK_PLYR_OOB	Is he inside the room's walls?
C13C	HANDLE_LEFT_RIGHT	Turn the robot
C1E2	TURNING_LEGS	The robot's legs while he turns (graphics 24 to 27)
C23D	HANDLE_JUMP	Start a jump
C25E	HANDLE_FORWARD	Step the legs
C296	MOVE_PLAYER	Move the robot
C2F6	CALC_PLYR_DUV	Add a step in the direction he faces
C319	GET_SPRITE_DIR	Which way an object faces
C337	STEP_U_DOWN	Step towards lower U
C340	STEP_U_UP	Step towards higher U
C347	STEP_V_UP	Step towards higher V
C350	STEP_V_DOWN	Step towards lower V
C357	ADJ_DZ_FOR_OUT_OF_BOUNDS	Shorten dZ at the floor
C36D	HANDLE_EXIT_SCREEN	Has the robot walked out of the room?
C386	SHORTEN_DELTA	Shorten a move by one unit
C397	EXIT_LOW_U	Out through the wall at low U?
C3F0	EXIT_HIGH_U	Out through the wall at high U?
C40B	EXIT_HIGH_V	Out through the wall at high V?
C426	EXIT_LOW_V	Out through the wall at low V?
C442	ADJ_FOR_OUT_OF_BOUNDS	Cut a move short against the room and the other objects
C497	ADJ_DU_FOR_OBJ_INTERSECT	Shorten dU against the other objects
C4E6	ADJ_DV_FOR_OBJ_INTERSECT	Shorten dV against the other objects
C535	ADJ_DZ_FOR_OBJ_INTERSECT	Shorten dZ against the other objects
C5A9	DO_OBJS_INTERSECT_ON_U	Do two objects overlap in U?
C5BE	DO_OBJS_INTERSECT_ON_V	Do two objects overlap in V?
C5D3	DO_OBJS_INTERSECT_ON_Z	Do two objects overlap in Z?
C5E9	ADJ_DU_FOR_OUT_OF_BOUNDS	Shorten dU at the walls
C613	ADJ_DV_FOR_OUT_OF_BOUNDS	Shorten dV at the walls
C63D	CALC_2D_INFO	Work out an object's screen rectangle
C657	SET_DRAW_OBJS_OVERLAPPED	Mark every object the moving object's old or new rectangle touches
C6E4	TOP_FOLLOWS_LEGS	The robot's top (graphics 32 to 43)
C71C	LIST_DRAWN	List the objects to be drawn
C785	SORT_AND_DRAW	Draw the listed objects, back to front
C869	ORDER_UNCONSTRAINED	A pair with no order between them
C86C	CANDIDATE_ALREADY_FIRST	The candidate is behind the other object
C86F	IY_GOES_FIRST	The other object must be drawn first
C8AB	BOXES_INTERSECT	Two boxes occupy the same space
C8D5	DRAW_CANDIDATE	Draw the candidate and start the next pass
C8EA	ALL_DRAWN	All the listed objects are drawn
C8FF	READ_CONTROLS	Read the controls
CA07	NEW_LIFE	Start a life
CA6D	NEW_GAME_START	Set the start records for a new game
CAA2	ENTER_ROOM	Build the room he is in
CAD2	RESET_ROOM_COLOURS	Give every room back its own colour
CAF1	TRANSFER_SPRITE	Copy a sprite's four bytes into the drawing record
CB06	TRANSFER_SPRITE_AND_PRINT	Copy a sprite's four bytes and draw it
CB0F	DISPLAY_PANEL	Draw the panel's scroll-work and icons at the foot of the screen
CB8A	PRINT_BORDER	Draw the border round the screen
CC01	ADJUST_PLYR_UVZ_FOR_ROOM_SIZE	Put the robot in the doorway he came in by
CC6D	ADJUST_PLYR_Z_FOR_ARCH	Stand the robot on the floor of the arch he comes in by
CC96	GET_PTR_OBJECT	The address of the object record numbered A
CCA7	BUILD_ROOM	Build a room's object records from the room directory
CE06	ADD_HL_A	HL = HL + A
CE0D	HL_EQUALS_DE_X_A	HL = DE * A
CE1C	ZERO_DE	Clear B bytes from DE
CE22	HANDLE_PAUSE	Pause, when SPACE is pressed on its own
CE4E	CLEAR_OBJECTS	Clear all 56 object records
CE60	CLR_BITMAP_MEMORY	Clear the display bitmap
CE68	CLR_ATTRIBUTE_MEMORY	Set every attribute to bright red on black
CE73	CLEAR_SCRN	Clear the screen and make the border black
CE7B	CLEAR_SCRN_BUFFER	Clear the screen buffer
CE85	SHOW_BUFFER	Copy the screen buffer to the screen
CEAB	RENDER_DYNAMIC_OBJECTS	Redraw what changed and copy it to the screen
CF85	BLIT_TO_SCREEN	Copy a rectangle of the buffer to the screen
CFA7	BUILD_LOOKUP_TBLS	Build the drawing tables
CFD2	CALC_PIXEL_XY	Project an object's position onto the screen
CFFE	FLIP_SPRITE	Find an object's sprite and make it face the right way
D013	CALC_PIXEL_XY_AND_RENDER	Draw one object from the draw list
D08F	SPRITE_ALIGNED_RUN	The unrolled row of a byte-aligned sprite
D0B9	SPRITE_ROW	Start a row of a sprite
D0BD	SPRITE_SHIFTED_RUN	The unrolled row of a shifted sprite
D120	CALC_VIDBUF_ADDR	Buffer address of a pixel position
D135	CALC_VRAM_ADDR	Display address of a pixel position
D157	CALC_ATTRIB_ADDR	Attribute address of a pixel position
D174	VFLIP_SPRITE_DATA	Turn a sprite's stored data the way its object faces