Routines

Address	Description
9470	The game has just loaded
9667	Active/inactive shield
9683	Draw Rex and shield
9731	Destroy all enemy projectiles
9739	Release a smartbomb
976E	Destroy an enemy if smartbomb released or Rex dead
97AB	Reset sound buffer, volume channels and check for FIRE key
97D2	Reset sound data and wait for FIRE key press
9807	Destroy enemy
98B0	Update attribute color for score points in HUD
98C9	Draw score on HUD
98D9	Draws lives number on HUD
98EC	Handle shield loss
9918	Draw shield power
9945	Increment score
996A	HUD flash
99E3	Handle FINAL BOSS destruction
9AE5	Draw explosion for FINAL BOSS
9B4D	Draw random attribute color for FINAL BOSS explosion
9BA7	Handle Rex Dead - Last live explossion
9CC5	Handle Rex dead - Main routine
9D2D	Handle respawn
9D68	Handle Rex dead - Resume or finish game
9E05	Rex visibility active
9E15	Configure data for Rex teleporting when game begins or resume
9E3D	Configure data for Rex teleporting when dead
9E67	Handle Rex visibility during teleporting
9EE4	Initialize teleporting into room data
9EF1	Configure teleporting out of the room
9F15	Handle FOOT MAN teleporting
9F8F	Hide a portion of Rex to simulate teleporting
9F9B	Handle Rex atoms flush during teleporting
A0F8	Handle Rex over special tiles
A26C	Update timer bar in HUD
A2DB	Initialize time bar loop counters
A2E6	Draws a windows in the display file
A34D	Draw HUD
A383	Draw the sprites for the smartbomb icons in HUD (1/2)
A39F	Draw the sprites for the smartbomb icons in HUD (2/2)
A3BA	Draw the sprites for the weapon icons in HUD (1/2)
A3E1	Draw the sprites for the weapon icons in HUD (2/2)
A432	Copy room graphic buffer to display file
A487	Print the text content of the windows
A51D	Pseudo-random number generator
A556	Reset display and attribute file
A570	Draw the number saved in charcode buffer at $A23D into display file
A5AA	Convert a number into a list of digits charcodes
A612	Configure and check key pressed routines for Rex movement
A68F	Pause game
A69C	Draw explosion debris
A6AB	Computes address position in tile type buffer based on (x,y) position on screen
A6DD	Computes address into attribute file based of (x,y)-pixel-position on screen
A706	Update arrow tiles, shield recharger and respawn indicator
A793	Initialise drones configuration data buffer
A7A4	Draw drones for multiple weapon
A8F6	Update weapon in inventory (HUD)
A939	Configure current room
A98E	Main loop for attract-mode
B243	Reset room graphic buffer
B296	Draw an entity (enemy, object or player)
B37F	Copy tile graphic into room graphic data
B3B8	Rex fires weapon
B49C	Handle spray weapon fire
B519	Configure Rex spray weapon projectile
B530	Computes offset into the room graphic data based on projectile y-delta
B54C	Configure weapon sound and check for weapon free slot
B5D4	Create a new projectile
B68B	Draw projectiles
B9E6	Update color attribute for weapon icon on HUD
BA09	Handle weapon energy increase
BA6A	Handle weapon energy loss
BAB8	Handle double energy loss
BAC6	Initialise weapon data (Laser)
BADC	Draw the windows borders in the display file
BB6B	Draw a row of borders for the windows
BB9E	Draw a 3x3 grid attribute color into attribute file if tile is background
BBEA	Copy a 3x3 grid of attribute color from attribute buffer to attribute file
BC0B	Copy the attribute file of the HUD (3 first rows) to the attribute buffer of the HUD
BC17	Draw random attribute color for explosion
BC48	Draw enemies (1/2)
BF4F	Draw enemies (2/2)
C141	Configure BULB projectiles
C1CB	Handle bubble bouncing and burst
C25E	Handle explosion debris movement and draw it
C2E7	Handle enemy lateral movement (1/2)
C3C1	Handle TRIANGLE
C433	Handle enemy lateral movement (2/2)
C5BE	Enemy configuration for FOOTMAN crouched or stand-by
C5E8	Handle FOOT MAN walking/stand-by state change
C627	Handle FOOT MAN walking/crouching state change
C66E	Enemy configuration for FOOT MAN jumping
C691	Handler for FOOT MAN jumping
C721	Handler for FOOT MAN falling
C794	Obtain the tile type address pointer under the entity
C7AE	Initialize graphic and attribute data buffers for current room
C932	Copy room color attribute buffer to attribute file
C95B	Utilities routine - Multiply two values
C962	Configure room connection and enemies of the room
C9CD	Check for end game room
C9E3	Generate train parts: front, middle or rear wagon
CA35	Creates a new mobile enemy on room
CAF6	Check if enemy can be generated in a position
CB41	Configure static enemies for the current room
CB77	Configure entity for the current room
CD44	Handle speed up duration
CD52	Configure Rex to move right
CD6E	Configure Rex to move left
CD8B	Handle Rex lateral movement
CD95	Move Rex left or right
CDB8	Handle Rex collision detection moving right
CDD2	Handle Rex collision detection moving left
CDF5	Check if a tile is a wall or a background
CE30	Check room connection to the left
CE41	Check room connection to the right
CE52	Configure Rex for jump
CE74	Handle Rex jumping
CEE5	Handle Rex falling
CF59	Handle enemy projectile collision with Rex
CFB5	Handle collision detection of enemy with Rex and projectiles
D24E	Handle Rex takes question
D338	Increment number of lives
D346	Reset sound data channels
D36F	Reset the 3 channel volumes of the AY-3-8912
D37F	Configure sound channel and mixer register
D424	Play sound channels
D473	Configure note for current channel
D4DC	Send channel volume command
D4F1	Send commands to AY-3-8912
D609	Show weapon bonus windows
D658	Draws an sprite
D6A1	Fill a rectangle with a color attribute in the attribute file
DAC0	Main loop for the tile screen
DB27	Enter and decode password
DD1F	Handle passsword code input
DE19	Keypress handlers for the title screen menu