Routines

Address	Description
8400	The game has just loaded
869F	Give two chances to enter a correct code
86C3	Display the code entry screen
873C	Read the keyboard during code entry
87CA	Display the title screen and play the theme tune
88FC	Start the game
8912	Initialise the current room
898B	Draw the remaining lives
89AD	Main loop (1)
8AEB	Cycle the INK and PAPER colours
8B07	Main loop (2)
8C01	Lose a life
8C4A	Display the game over sequence
8D33	Draw the current room to the screen buffer at 7000
8D6B	Fill the buffer at 5E00 with attribute bytes for the current room
8DC0	Copy a room attribute byte into the buffer at 5E00
8DD3	Move Willy (1)
8ED4	Move Willy (2)
8FBC	Move Willy (3)
90B6	Kill Willy
90C0	Move the rope and guardians in the current room
91BE	Draw the rope, arrows and guardians in the current room
93D1	Draw the items in the current room and collect any that Willy is touching
9456	Draw a sprite
948A	Move Willy into the room to the left
949E	Move Willy into the room to the right
94B0	Move Willy into the room above
94D2	Move Willy into the room below
94F9	Move the conveyor in the current room
9534	Deal with special rooms (Master Bedroom, The Bathroom)
9584	Check whether Willy has reached the toilet
959A	Animate the toilet in The Bathroom
95C8	Check and set the attribute bytes for Willy's sprite in the buffer at 5C00
961E	Check and set the attribute byte for a cell occupied by Willy's sprite
9637	Draw Willy to the screen buffer at 6000
9680	Print a message
9691	Print a single character
96A2	Play the theme tune (Moonlight Sonata)
96C9	Check whether ENTER, 0 or the fire button is being pressed
96DE	Play an intro message sound effect