Rex (Side A): Routines

Address	Description
947A	The game has just loaded
967F	Active/inactive shield
969B	Draw Rex and shield
9749	Destroy all enemy projectiles
9751	Release a smartbomb
9786	Destroy an enemy if smartbomb released or Rex dead
97C3	Reset sound buffer, volume channels and check for FIRE key
97EA	Reset sound data and wait for FIRE key press
97FD	Configure explosion
981F	Destroy enemy
98AF	Handle Boss destruction. Boss semi/full destroyed
9968	Handle train stop. Front wagon has been destroyed
9992	Update attribute color for score points in HUD
99AB	Draw score on HUD
99BB	Draws lives number on HUD
99CE	Handle shield loss
99FA	Draw shield power
9A27	Increment score
9A4C	HUD flash
9AC5	Handle Rex Dead - Last live explossion
9BDA	Handle Rex dead - Main routine
9C3B	Handle respawn
9C76	Handle Rex dead - Resume or finish game
9D0F	Rex visibility active
9D1F	Configure data for Rex teleporting when game begins or resume
9D47	Configure data for Rex teleporting when dead
9D71	Handle Rex visibility during teleporting
9E02	Handle Rex atoms flush during teleporting
9F5F	Handle Rex over special tiles
A0C4	Update timer bar in HUD
A133	Initialize time bar loop counters
A13E	Draws a windows in the display file
A1A5	Draw HUD
A1DB	Draw the sprites for the smartbomb icons in HUD (1/2)
A1F7	Draw the sprites for the smartbomb icons in HUD (2/2)
A212	Draw the sprites for the weapon icons in HUD (1/2)
A239	Draw the sprites for the weapon icons in HUD (2/2)
A28A	Copy room graphic buffer to display file
A2DF	Print the text content of the windows
A375	Pseudo-random number generator
A3AE	Reset display and attribute file
A3C8	Draw the number saved in charcode buffer at A0A4 into display file
A402	Convert a number into a list of digits charcodes
A46A	Configure and check key pressed routines for Rex movement
A4E7	Pause game
A4F4	Draw explosion debris
A503	Computes address position in tile type buffer based on (x,y) position on screen
A535	Computes address into attribute file based of (x,y)-pixel-position on screen
A55E	Update arrow tiles, shield recharger, respawn indicator, fire and water effect
A628	Initialise drones configuration data buffer
A639	Draw drones for multiple weapon
A78B	Update weapon in inventory (HUD)
A7A9	Simulate conveyor belt going up
A7BA	Simulate conveyor belt going down
A7CE	Computes and show password code for Rex 2
A89D	Configure current room
A915	Main loop for attract-mode
B205	Reset room graphic buffer
B258	Draw an entity (enemy, object or player)
B339	Copy tile graphic into room graphic data
B372	Rex fires weapon
B456	Handle spray weapon fire
B4D3	Configure scanner bullet projectile and Rex spray weapon projectile
B4EA	Computes offset into the room graphic data based on projectile y-delta
B506	Configure weapon sound and check for weapon free slot
B57E	Create a new projectile
B645	Draw projectiles
B96B	Update color attribute for weapon icon on HUD
B98E	Handle weapon energy increase
B9EF	Handle weapon energy loss
BA3D	Handle double energy loss
BA49	Initialise weapon data
BA5C	Draw enemies
BE5B	Configure projectile for swing gun
BED3	Handle bubble bouncing and burst
BF66	Handle explosion debris movement and draw it
BFEF	Handle lateral movement for FOOTMAN, STOMPER, MINE, SCANNER, POD, MINE LAYER and BLOB
C03A	Scanner fire weapon
C05A	Handle POD and MINE LAYER
C0E0	Handle collision detection for BLOB
C12E	Change x/y-delta for BLOB
C14D	Handle BLOB and MINE movement
C1CA	Handle lateral collision detection for POD and MINE LAYER and shot for MINE LAYER
C213	Handle SCANNER - moves up
C239	Handler for Scanner bumping animation
C27E	Handle scanner shot and collision detection horizontally
C2FD	Handle SCANNER - Moves down
C3BE	Configure scanner for bump/fire state
C3E0	Handle collision detection for entity moving right
C4A6	Handle collision detection for entity moving left
C531	Handle possible crouch for FOOT MAN
C540	Handle possible jump for FOOT MAN
C54D	Enemy configuration for FOOTMAN crouched or stand-by
C577	Handle FOOT MAN walking/stand-by state change
C5B6	Handle FOOT MAN walking/crouching state change
C5FD	Enemy configuration for FOOT MAN jumping
C620	Handler for enemies going up: SCANNER, POD, MINE LAYER and FOOTMAN Jumping
C6C2	Handler for enemies going down: SCANNER, POD, MINE LAYER and FOOTMAN falling
C72B	Obtain the tile type address pointer under the entity
C745	Initialize graphic and attribute data buffers for current room
C8BF	Copy room color attribute buffer to attribute file
C8DB	Utilities routine - Wait some time
C8E8	Utilities routine - Multiply two values
C8EF	Configure room connection and enemies of the room
C95A	Check for end game room
C965	Initialize train for the current room
C978	Generate train parts: front, middle or rear wagon
C9CA	Creates a new mobile enemy on room
CB03	Check if enemy can be generated in a position
CB52	Configure static enemies for the current room
CB88	Configure entity for the current room
CE7B	Draw the windows borders in the display file
CF0A	Draw a row of borders for the windows
CF3D	Draw a 3x3 grid attribute color into attribute file if tile is background
CF6E	Copy a 3x3 grid of attribute color from attribute buffer to attribute file
CF8F	Copy the attribute file of the HUD (3 first rows) to the attribute buffer of the HUD
CF9B	Draw random attribute color for explosion
CFCC	Handle speed up duration
CFDA	Configure Rex to move right
CFF6	Configure Rex to move left
D013	Handle Rex lateral movement
D01D	Move Rex left or right
D040	Handle Rex collision detection moving right
D056	Handle Rex collision detection moving left
D06C	Check if a tile is a wall or a background
D0A0	Check room connection to the left
D0B1	Check room connection to the right
D0C2	Configure Rex for jump
D0E4	Handle Rex jumping
D14D	Handle Rex falling
D1B9	Handle enemy projectile collision with Rex
D215	Handle collision detection of enemy with Rex and projectiles
D4B6	Handle Rex takes question
D5A0	Increment lives
D5AE	Reset sound data channels
D5D7	Reset the 3 channel volumes of the AY-3-8912
D5E7	Configure sound channel and mixer register
D682	Send data to the mixer register of AY-3-8912
D68C	Play sound channels
D6DB	Configure note for current channel
D744	Send channel volume command
D759	Send commands to AY-3-8912
D858	Check for an slot in Enemy configuration buffer to create another enemy
D871	Show weapon bonus windows
D8A3	Copy screen display file into room graphic data buffer
D8C0	Draws an sprite
D909	Fill a rectangle with a color attribute in the attribute file
DAC0	Main loop for the tile screen
DBAE	Check for key pressed in the DEFINE keys windows
DD54	Keypress handlers for the title screen menu
E00B	Draw the enemy sprite on title screen (1/2)
E04F	Draw the enemy sprite on title screen (2/2)