Routines

Address	Description
8400	The game has just loaded
85CC	Display the title screen and play the theme tune
8684	Start the game (or demo mode)
870E	Main loop
8944	Display the game over sequence
8A3C	Decrease the air remaining in the current cavern
8A75	Draw the current cavern to the screen buffer at 7000
8ABB	Move Willy (1)
8BBA	Animate a crumbling floor tile in the current cavern
8BDD	Move Willy (2)
8D05	Kill Willy
8D0F	Move the horizontal guardians in the current cavern
8D73	Move and draw the light beam in Solar Power Generator
8DAA	Draw the horizontal guardians in the current cavern
8DF8	Move and draw Eugene in Eugene's Lair
8E75	Move and draw the Skylabs in Skylab Landing Bay
8EF1	Move and draw the vertical guardians in the current cavern
8F63	Draw the items in the current cavern and collect any that Willy is touching
8FC5	Draw the portal, or move to the next cavern if Willy has entered it
8FF4	Draw a sprite
9028	Move to the next cavern
90EA	Add to the score
9105	Move the conveyor in the current cavern
9135	Move and draw the Kong Beast in the current cavern
921B	Flip a switch in a Kong Beast cavern if Willy is touching it
923A	Check and set the attribute bytes for Willy's sprite in the buffer at 5C00
925F	Check and set the attribute byte for a cell occupied by Willy's sprite
927F	Draw Willy to the screen buffer at 6000
92BA	Print a message
92CB	Print a single character
92DC	Play the theme tune (The Blue Danube)
932B	Calculate the attribute file address for a piano key
9337	Check whether ENTER or the fire button is being pressed