Rex (Side A): Memory map

Page	Byte	Address	Description
64	0	4000	Loading screen
91	0	5B00	Unused
91	96	5B60	Rex projectile configuration
93	34	5D22	Enemy projectiles configuration for the current room
94	78	5E4E	Drones configuration for multiple weapon
94	102	5E66	Data buffer for the state of every enemy on screen
95	230	5FE6	Stack (SP = $6000 at init game )
96	0	6000	Not used
96	24	6018	Graphic data for FOOT MAN falling/jumping
96	216	60D8	Unused
96	224	60E0	Charset and ui graphics
98	224	62E0	Tile collision behaviour
99	224	63E0	Tiles graphic data
107	224	6BE0	Tiles attributes
108	224	6CE0	Supertiles layout
117	224	75E0	Room layout
127	114	7F72	Graphics data for player, enemies, hud and room objects
148	122	947A	The game has just loaded
150	123	967B	Routine not used
150	127	967F	Active/inactive shield
150	155	969B	Draw Rex and shield
151	73	9749	Destroy all enemy projectiles
151	81	9751	Release a smartbomb
151	134	9786	Destroy an enemy if smartbomb released or Rex dead
151	195	97C3	Reset sound buffer, volume channels and check for FIRE key
151	234	97EA	Reset sound data and wait for FIRE key press
151	253	97FD	Configure explosion
152	31	981F	Destroy enemy
152	175	98AF	Handle Boss destruction. Boss semi/full destroyed
153	78	994E	Table points based on enemy types. Score = points * 100
153	104	9968	Handle train stop. Front wagon has been destroyed
153	146	9992	Update attribute color for score points in HUD
153	171	99AB	Draw score on HUD
153	187	99BB	Draws lives number on HUD
153	206	99CE	Handle shield loss
153	250	99FA	Draw shield power
154	39	9A27	Increment score
154	76	9A4C	HUD flash
154	179	9AB3	Commands table for HUD flash
154	197	9AC5	Handle Rex Dead - Last live explossion
155	218	9BDA	Handle Rex dead - Main routine
156	5	9C05	Rex offsets for compute explosion position
156	11	9C0B	Rex explosion position and index for graphic data
156	59	9C3B	Handle respawn
156	118	9C76	Handle Rex dead - Resume or finish game
157	15	9D0F	Rex visibility active
157	31	9D1F	Configure data for Rex teleporting when game begins or resume
157	71	9D47	Configure data for Rex teleporting when dead
157	113	9D71	Handle Rex visibility during teleporting
158	2	9E02	Handle Rex atoms flush during teleporting
159	12	9F0C	Graphic data for atoms based on bits2-0 x-position of atom
159	20	9F14	Rex atoms data during teleporting
159	95	9F5F	Handle Rex over special tiles
160	18	A012	FIRE key hold down
160	19	A013	Rex weapon in use
160	20	A014	Weapon energy level. Value on init $01
160	21	A015	Attribute file pointer to current weapon icon in HUD
160	23	A017	Tilt arrow tiles
160	24	A018	Weapon energy quantity - Value $00 on init
160	25	A019	Address pointer into tile type buffer based on Rex position
160	27	A01B	Address pointer into tile buffer of the tile under the entity
160	29	A01D	Counter for tile drawn on room graphic buffer
160	30	A01E	Pointer to the tile type buffer for the currently draw tile
160	32	A020	Addres pointer to static enemy definition for the current room
160	34	A022	BOSS health
160	35	A023	Nou used
160	40	A028	Horizontal position for windows
160	41	A029	Vertical position for windows
160	42	A02A	Length of the longest line for the windows
160	43	A02B	Number of lines for the windows
160	44	A02C	Enemy enters the room from left
160	45	A02D	Enemy enters the room from right
160	46	A02E	Enemy enters the room from top
160	47	A02F	Max number of enemies to be destroyed when Destroy all enemies indicator active
160	48	A030	Destroy all enemies indicator
160	49	A031	Address pointer into the enemy configuration buffer for the enemy to be destroyed when Destroy all enemies indicator is active
160	51	A033	Entity type
160	52	A034	Address for the graphic data of entity
160	54	A036	Not used
160	56	A038	Initialised but never used
160	57	A039	Address pointer into attribute file/buffers for score points
160	59	A03B	Loop counter for score points
160	60	A03C	Score points value
160	62	A03E	Score - Value $0000 on init
160	64	A040	Rapid shots active - Value $00 on init
160	65	A041	Number of rapid shots
160	66	A042	HUD flash index - Value $FF on init
160	67	A043	Counter for enemy enter the room (updated)
160	68	A044	Counter for enemy enter the room (original)
160	69	A045	Train is generating on current room. Used at routine A89D
160	70	A046	Address into train definition buffer. Used at routine A89D
160	72	A048	Counter for train appearance. Used at routine A89D
160	73	A049	Shield power active - Value $00 on init
160	74	A04A	Not used
160	76	A04C	Shield power key hold down
160	77	A04D	Shield power - Value $63 on init
160	78	A04E	Shield loss counter - Value $02 on init
160	79	A04F	Machine gun weapon on inventory indicator
160	80	A050	Double Fire weapon on inventory indicator
160	81	A051	Laser weapon on inventory indicator
160	82	A052	Multiple weapon on inventory indicator
160	83	A053	Spray weapon on inventory indicator
160	84	A054	Projectile type of enemy
160	85	A055	Rex status - Value $00 on init
160	86	A056	Rex explosion counter
160	87	A057	Address pointer into Rex explosion data buffer to compute explosion position
160	89	A059	x-position of last respawn saved - Value $A0 on init
160	90	A05A	y-position of last respawn saved - Value $60 on init
160	91	A05B	room number of last respawn saved - Value $00 on init
160	92	A05C	Room configured - Value $00 on init
160	93	A05D	Rex visibility
160	94	A05E	Number of lines of Rex to hide (used in teleporting animation)
160	95	A05F	Atoms flush during teleporting
160	96	A060	Rex teleporting
160	97	A061	Teleporting counter
160	98	A062	Teleporting (begin game or dead)
160	99	A063	Number of lives
160	100	A064	Time bar update slot index - Value $00 on init
160	101	A065	Loop counter used for title screen main loop and time bar in HUD
160	102	A066	Time bar update direction - Value $00 on init
160	103	A067	Number of time slots availables
160	104	A068	Laser duration - Value $00 on init
160	105	A069	Respawn indicator index value - Value $00 on init
160	106	A06A	Shield recharger index value - Value $00 on init
160	107	A06B	Respawn fire index value - Value $00 on init
160	108	A06C	Number of smartbombs in the inventory
160	109	A06D	Not used
160	110	A06E	Number of weapon that has energy
160	111	A06F	Bonus windows number
160	112	A070	Not used
160	113	A071	Rex inmortal - Value $00 on init
160	114	A072	Rex speed - Value $00 on init
160	115	A073	Rex speed up duration - Value $00 on init
160	116	A074	Not used
160	118	A076	Lives Score - Value $0000 on init
160	120	A078	Not used
160	122	A07A	Rex on elevator
160	123	A07B	Actor firing indicator
160	124	A07C	Water effect index value - Value $00 on init
160	125	A07D	Bonus Windows Loop Counter
160	127	A07F	Animation frame number of the enemy showed in the tile screen
160	128	A080	Not used
160	129	A081	Point address for animation definition of every enemy displayed in the tile screen
160	131	A083	Point address for the base animation definition of the enemies displayed in the tile screen
160	133	A085	Enemy windows on tile screen visible or hidden
160	134	A086	Address pointer for the next windows data to show on tile screen
160	136	A088	Type of mobile enemy for the current room
160	137	A089	Humans killed - Value $0000 on init
160	138	A08A	Not used
160	139	A08B	Minimum score for the game - Value $000A on init
160	141	A08D	Room connection - right room number
160	142	A08E	Room connection - top room number
160	143	A08F	Room connection - bottom room number
160	144	A090	Room connection - left room number
160	145	A091	Speed of Rex - Value $00 on init
160	146	A092	Max number of enemies in the current room
160	147	A093	Used in multiple routines as temporal variable
160	149	A095	Used in multiple routines as temporal variable
160	151	A097	Used in multiple routines as temporal variable
160	153	A099	Used in multiple routines as temporal variable
160	154	A09A	Not used
160	159	A09F	Color attribute for windows body
160	160	A0A0	Not used
160	161	A0A1	Seed for pseudo-random number generator.
160	163	A0A3	Seed status variable
160	164	A0A4	Charcode buffer for number conversion
160	171	A0AB	Port used to read the key pressed
160	173	A0AD	Opcode of the corresponent BIT operation to check key presses
160	174	A0AE	Input device type
160	175	A0AF	X-position of entity
160	176	A0B0	Y-position of entity
160	177	A0B1	Width of entity sprite (in bytes)
160	178	A0B2	Height of entity sprite (in pixels)
160	179	A0B3	Initialised in game, but not used
160	180	A0B4	Not used
160	182	A0B6	Rex x-position (in pixels) - Value $A0 on init
160	183	A0B7	Rex y-position (in pixels) - Value $60 on init
160	184	A0B8	Current room number
160	185	A0B9	Pointer to the address mapping table of tile graphics data and room graphics buffer
160	187	A0BB	Rex facing direction ($00 right / $01 left) - Value $00 on init
160	188	A0BC	Rex falling speed - Value $00 on init
160	189	A0BD	Rex is jumping - Value $00 on init
160	190	A0BE	Not used
160	192	A0C0	Address pointer into table for Rex jumping y-offsets
160	194	A0C2	List number of the room displayed on attract-mode
160	195	A0C3	Loop counter for run the displayed room on attract-mode
160	196	A0C4	Update timer bar in HUD
161	51	A133	Initialize time bar loop counters
161	62	A13E	Draws a windows in the display file
161	165	A1A5	Draw HUD
161	219	A1DB	Draw the sprites for the smartbomb icons in HUD (1/2)
161	241	A1F1	Data buffer for the smartbomb icons in HUD
161	247	A1F7	Draw the sprites for the smartbomb icons in HUD (2/2)
162	2	A202	Offsets graphics data for smartbombs in HUD
162	18	A212	Draw the sprites for the weapon icons in HUD (1/2)
162	51	A233	Data buffer for the weapon icons in HUD
162	57	A239	Draw the sprites for the weapon icons in HUD (2/2)
162	76	A24C	Text definition for HUD
162	138	A28A	Copy room graphic buffer to display file
162	223	A2DF	Print the text content of the windows
163	104	A368	Routine not used
163	117	A375	Pseudo-random number generator
163	174	A3AE	Reset display and attribute file
163	200	A3C8	Draw the number saved in charcode buffer at A0A4 into display file
164	2	A402	Convert a number into a list of digits charcodes
164	106	A46A	Configure and check key pressed routines for Rex movement
164	231	A4E7	Pause game
164	244	A4F4	Draw explosion debris
165	3	A503	Computes address position in tile type buffer based on (x,y) position on screen
165	53	A535	Computes address into attribute file based of (x,y)-pixel-position on screen
165	94	A55E	Update arrow tiles, shield recharger, respawn indicator, fire and water effect
165	244	A5F4	Table of graphic data addresses for tile animation
166	40	A628	Initialise drones configuration data buffer
166	57	A639	Draw drones for multiple weapon
166	203	A6CB	Offset position table for drones
167	75	A74B	Graphic data for drones
167	139	A78B	Update weapon in inventory (HUD)
167	169	A7A9	Simulate conveyor belt going up
167	186	A7BA	Simulate conveyor belt going down
167	206	A7CE	Computes and show password code for Rex 2
168	132	A884	Text definition data for end level code
168	157	A89D	Configure current room
169	12	A90C	List of rooms in attract-mode
169	21	A915	Main loop for attract-mode
169	175	A9AF	Table of position and graphic offset for missile trajectory
169	204	A9CC	Charset for the corresponding key pressed
169	244	A9F4	Data definition for train in room
170	14	AA0E	Position offsets for explosion debris
170	110	AA6E	Graphic data for explosion debris
170	174	AAAE	Text Definition Data - Start game, game over and in-game windows
171	213	ABD5	Not used
171	221	ABDD	Display file lookup table
173	93	AD5D	Invert byte lookup table
174	93	AE5D	Offsets table for animated sprites
174	141	AE8D	Graphic data for arrows tiles
174	205	AECD	Enemy configuration for every room
177	51	B133	Room directions and enemy pointers
178	5	B205	Reset room graphic buffer
178	88	B258	Draw an entity (enemy, object or player)
179	57	B339	Copy tile graphic into room graphic data
179	114	B372	Rex fires weapon
180	54	B436	Configuration data for SCANNER projectiles and REX spray weapon
180	86	B456	Handle spray weapon fire
180	211	B4D3	Configure scanner bullet projectile and Rex spray weapon projectile
180	234	B4EA	Computes offset into the room graphic data based on projectile y-delta
181	6	B506	Configure weapon sound and check for weapon free slot
181	126	B57E	Create a new projectile
182	69	B645	Draw projectiles
185	67	B943	Laser graphics
185	107	B96B	Update color attribute for weapon icon on HUD
185	142	B98E	Handle weapon energy increase
185	239	B9EF	Handle weapon energy loss
186	61	BA3D	Handle double energy loss
186	73	BA49	Initialise weapon data
186	92	BA5C	Draw enemies
190	83	BE53	Y-pixel-offsets for Boss lasers shots
190	91	BE5B	Configure projectile for swing gun
190	203	BECB	Swing gun graphic data offsets
190	211	BED3	Handle bubble bouncing and burst
191	91	BF5B	Bubble graphic data offsets
191	102	BF66	Handle explosion debris movement and draw it
191	231	BFE7	List of 'random' attribute colors for explosion
191	239	BFEF	Handle lateral movement for FOOTMAN, STOMPER, MINE, SCANNER, POD, MINE LAYER and BLOB
192	58	C03A	Scanner fire weapon
192	90	C05A	Handle POD and MINE LAYER
192	224	C0E0	Handle collision detection for BLOB
193	46	C12E	Change x/y-delta for BLOB
193	73	C149	Data buffer of x-delta and y-delta for BLOB
193	77	C14D	Handle BLOB and MINE movement
193	202	C1CA	Handle lateral collision detection for POD and MINE LAYER and shot for MINE LAYER
194	19	C213	Handle SCANNER - moves up
194	57	C239	Handler for Scanner bumping animation
194	90	C25A	List of graphic data pointers to scanner bumping animation
194	126	C27E	Handle scanner shot and collision detection horizontally
194	253	C2FD	Handle SCANNER - Moves down
195	190	C3BE	Configure scanner for bump/fire state
195	224	C3E0	Handle collision detection for entity moving right
196	166	C4A6	Handle collision detection for entity moving left
197	49	C531	Handle possible crouch for FOOT MAN
197	64	C540	Handle possible jump for FOOT MAN
197	77	C54D	Enemy configuration for FOOTMAN crouched or stand-by
197	119	C577	Handle FOOT MAN walking/stand-by state change
197	182	C5B6	Handle FOOT MAN walking/crouching state change
197	250	C5FA	Routine not used
197	253	C5FD	Enemy configuration for FOOT MAN jumping
198	32	C620	Handler for enemies going up: SCANNER, POD, MINE LAYER and FOOTMAN Jumping
198	194	C6C2	Handler for enemies going down: SCANNER, POD, MINE LAYER and FOOTMAN falling
199	43	C72B	Obtain the tile type address pointer under the entity
199	69	C745	Initialize graphic and attribute data buffers for current room
200	191	C8BF	Copy room color attribute buffer to attribute file
200	219	C8DB	Utilities routine - Wait some time
200	232	C8E8	Utilities routine - Multiply two values
200	239	C8EF	Configure room connection and enemies of the room
201	90	C95A	Check for end game room
201	101	C965	Initialize train for the current room
201	120	C978	Generate train parts: front, middle or rear wagon
201	202	C9CA	Creates a new mobile enemy on room
203	3	CB03	Check if enemy can be generated in a position
203	82	CB52	Configure static enemies for the current room
203	136	CB88	Configure entity for the current room
206	123	CE7B	Draw the windows borders in the display file
207	10	CF0A	Draw a row of borders for the windows
207	61	CF3D	Draw a 3x3 grid attribute color into attribute file if tile is background
207	110	CF6E	Copy a 3x3 grid of attribute color from attribute buffer to attribute file
207	143	CF8F	Copy the attribute file of the HUD (3 first rows) to the attribute buffer of the HUD
207	155	CF9B	Draw random attribute color for explosion
207	204	CFCC	Handle speed up duration
207	218	CFDA	Configure Rex to move right
207	246	CFF6	Configure Rex to move left
208	19	D013	Handle Rex lateral movement
208	29	D01D	Move Rex left or right
208	64	D040	Handle Rex collision detection moving right
208	86	D056	Handle Rex collision detection moving left
208	108	D06C	Check if a tile is a wall or a background
208	150	D096	List of 'wall' type tiles
208	154	D09A	List of 'background' type tiles
208	160	D0A0	Check room connection to the left
208	177	D0B1	Check room connection to the right
208	194	D0C2	Configure Rex for jump
208	216	D0D8	FOOT MAN and Rex jumping y-offsets increments
208	227	D0E3	Not used
208	228	D0E4	Handle Rex jumping
209	77	D14D	Handle Rex falling
209	185	D1B9	Handle enemy projectile collision with Rex
210	21	D215	Handle collision detection of enemy with Rex and projectiles
212	172	D4AC	Address pointers into text definition windows for bonus
212	182	D4B6	Handle Rex takes question
213	160	D5A0	Increment lives
213	174	D5AE	Reset sound data channels
213	215	D5D7	Reset the 3 channel volumes of the AY-3-8912
213	231	D5E7	Configure sound channel and mixer register
214	130	D682	Send data to the mixer register of AY-3-8912
214	140	D68C	Play sound channels
214	219	D6DB	Configure note for current channel
215	68	D744	Send channel volume command
215	89	D759	Send commands to AY-3-8912
215	99	D763	Sound data
216	50	D832	Channel data buffer por playing sound
216	74	D84A	Not used
216	85	D855	Sound data mixer
216	86	D856	Not used
216	87	D857	Channel volumne number (1-3)
216	88	D858	Check for an slot in Enemy configuration buffer to create another enemy
216	113	D871	Show weapon bonus windows
216	163	D8A3	Copy screen display file into room graphic data buffer
216	192	D8C0	Draws an sprite
217	9	D909	Fill a rectangle with a color attribute in the attribute file
217	46	D92E	Routine not used
217	48	D930	Unused
217	98	D962	Mapping table for tile graphic and room graphic buffer
218	192	DAC0	Main loop for the tile screen
219	174	DBAE	Check for key pressed in the DEFINE keys windows
220	38	DC26	Text Definition Data - Enemy showroom on title screen
221	78	DD4E	Defined keys for Rex controls
221	83	DD53	Not used
221	84	DD54	Keypress handlers for the title screen menu
223	5	DF05	Text Defintion Data - Control configuration
224	11	E00B	Draw the enemy sprite on title screen (1/2)
224	73	E049	Data buffer for the enemy sprite on title screen
224	79	E04F	Draw the enemy sprite on title screen (2/2)
224	103	E067	Animation definition for the enemies showed in the tile screen
224	224	E0E0	List of ports for read the keys
224	240	E0F0	Unused
224	246	E0F6	Graphic data for the enemies showed in the title screen
228	214	E4D6	Not used
228	255	E4FF	Title screen
255	255	FFFF	Unused