Deathchase

Routines

Address	Description
5E00	Move the trees
5EFE	Check for movement controls
5F28	Move right
5F47	Move left
5F66	Straighten up
5F89	Print objects on the playing field
6074	Print the next sector
60AA	Play an ascending sound
60C1	Switch from NIGHT to DAY
6113	Switch from DAY to NIGHT
6150	Draw the enemy bikes
61F3	Recalculate where the enemy bikes should be
628D	Print "KEYBOARD"
6298	Print "KEMPSTON"
62A3	Print the copyright notice
62AE	See if 1 (keyboard) or 2 (Kempston) was pressed, and start a game if so
62CB	Switch to a new sector
62F7	Switch background colour on huge trees between DAY and NIGHT, and initialize the bikes
633A	Move a plane or tank across the screen if appropriate
6371	Set up the play stats
637C	Move the plane across screen
63FC	Move the plane
642E	Draw a bonus enemy
6453	Move the tank
6478	Play "enemy bike exploding" sound
6491	Return a random 8-bit number in A
64B7	Recalculate new tree density based on sector
6530	Clear the screen
657F	Main entry point
65B3	Start a new game
663D	Main loop
669D	Check for Kempston input (if configured)
66AF	Check for keyboard input
66BC	Speed up
66CC	Slow down
66D6	Idle
66DB	Print the bike's handlebars
66FD	Collision detection. Did we hit anything?
6711	CRASH - hit a tree! Bring it close up to the player so we crash into it
6772	Wipe out playing area
6781	Play "hit a tree" sequence
67C6	Make the bikes get nearer or further away
6802	Track the photon bolt on screen
6859	Draw trail of photon bolt
686B	Stop photon bolt (so another can be fired)
6886	The photon bolt has hit something, find out what
68F0	See if fire is pressed and if so, set a photon bolt to fire
6918	Print the bike and static display
6949	Print a string
6969	Print the current score
6974	Print number of lives
6989	Update the current score
698E	Update the high score
69A7	Set up some flags (non useful?)
69BB	Print the range indicator
69CD	Toggle the range indicator on or off
69E3	We hit a bike - destroy it
6A28	Adjust the photon bolt left or right
6A33	Display an exploding bike
6AC2	Show the enemy bikes pieces shattering
6B71	Print that the game is over
6B7F	Play a descending sound
6B96	Save the game to tape if bit 0 in 5DEB is reset and P is held down, then S is pressed
6BDD	Update the highest score to the last score if it is greater
6BFC	Print the high score
6C17	Signal bonus
6C3A	Print bonus message