Memory map

Page	Byte	Address	Description
64	0	4000	Loading screen
91	128	5B80	Decryption Routine
92	176	5CB0	Indirect Jump
94	0	5E00	Game Options
94	1	5E01	Unused
94	4	5E04	Font Pointer
94	6	5E06	High Score
94	9	5E09	High Score Table
94	32	5E20	Hall Of Fame Names
94	53	5E35	Hall Of Fame Last Name
94	56	5E38	Hall Of Fame Name End
94	64	5E40	Random Number
94	66	5E42	Game Timer
94	80	5E50	Planet Data
94	82	5E52	Frame Updated
94	83	5E53	Last Frame
94	86	5E56	Sprite Cached Y
94	87	5E57	Sprite Width
94	88	5E58	Sprite Height
94	89	5E59	Sprite Rows Left
94	90	5E5A	Sprite Cached Rows
94	93	5E5D	Space Key Latch
94	94	5E5E	Alien Count
94	95	5E5F	1UP Score
94	98	5E62	2UP Score
94	101	5E65	Active Player
94	102	5E66	Current menu item colour attribute
94	103	5E67	Game Delay Timer
94	104	5E68	Teleport Restore
94	105	5E69	Debris Count
94	106	5E6A	Debris Y
94	108	5E6C	Player Inactive
94	109	5E6D	Hall Of Fame Timer
94	111	5E6F	Hall Of Fame Index
94	112	5E70	Hall Of Fame Fire Lock
94	113	5E71	High Score Player
94	114	5E72	High Score Other Player
94	115	5E73	High Score Done
94	116	5E74	High Score Player Copy
94	117	5E75	Hall Of Fame Pointer
94	119	5E77	High Score Position
94	120	5E78	Hall Of Fame Name
94	123	5E7B	Debris Pitch
94	124	5E7C	Previous Game Options
94	160	5EA0	Active Player Level
94	161	5EA1	Active Player Lives
94	162	5EA2	Level Parity
94	163	5EA3	Rover Cargo Flag
94	164	5EA4	Inactive Player Level
94	165	5EA5	Inactive Player Lives
94	166	5EA6	Inactive Level Parity
94	167	5EA7	Inactive Rover Cargo Flag
94	168	5EA8	Unused
96	0	6000	Laser Beam Parameters
96	96	6060	Explosion Slot
96	120	6078	Jetman Slot
96	142	608E	Fuel Level
96	144	6090	Rover Slot
96	168	60A8	World Slots
97	8	6108	Object Slots
97	128	6180	Alien Base Slot
97	152	6198	Bomb Slot
97	176	61B0	Alien States
98	64	6240	Actor List End
112	0	7000	Active Terrain Data
116	0	7400	Inactive Terrain Data
128	0	8000	Security Check
128	10	800A	Game Initialisation
128	44	802C	Game Restart
128	209	80D1	Game Selection Menu
128	253	80FD	Queue Menu Tune
129	14	810E	Game Select Attribute Table
129	21	8115	Game Select Y Position Table
129	28	811C	Messaging: Game Selection Title
129	138	818A	Messaging: Copyright
129	171	81AB	Write Menu Line
129	187	81BB	Start Game
130	9	8209	Frame Update
130	47	822F	Reset Modified Code
130	63	823F	Reset Modified Code In Frame
130	74	824A	Limit Frame Rate
130	88	8258	Unused
130	89	8259	Next Object Slot
130	152	8298	Controls: Pause
130	197	82C5	Jump Table
132	173	84AD	Reset Screen Buffer
132	180	84B4	Fill Memory
132	187	84BB	Reset Attribute Buffer
132	216	84D8	Create Game Window
132	247	84F7	Reset Planet
133	6	8506	Calculate Attribute Address
133	30	851E	Calculate Screen Address
133	61	853D	Remap Alien Sprite
133	104	8568	Fetch Sprite
133	127	857F	Fetch Actor Sprite
133	142	858E	XOR Sprite Loop
133	217	85D9	Shift Old Sprite Pair
133	246	85F6	Screen Address One Pixel Above
134	6	8606	XOR Sprite Pair Up
134	20	8614	Prepare Sprite Write
134	52	8634	Position And Draw Sprite
134	64	8640	Draw Cached Sprite
134	79	864F	Clear Sprite Scratch
134	94	865E	Load Sprite Scratch
134	127	867F	Reset Sprite Fields
134	161	86A1	Position Sprite
135	1	8701	Draw Sprite
135	51	8733	Colourise Sprite
135	124	877C	Draw Sprite Pair
135	135	8787	Draw Actor Sprite
135	185	87B9	Write Sprite Row
136	7	8807	Continue Sprite Write
136	38	8826	Fetch And Draw
136	145	8891	Clear Sprite Cache
136	163	88A3	Fetch Sprite Size
136	177	88B1	Read Sprite Header
136	232	88E8	Load Sprite Pointers
137	10	890A	Write Sprite Attributes
137	49	8931	Fill Attribute Row
137	71	8947	Negate Pair
137	79	894F	Display Lives
137	156	899C	Add Points To Score
137	191	89BF	Print Scores
137	239	89EF	Print Character
138	17	8A11	Print Colour String
138	55	8A37	Print Banner
138	81	8A51	Messaging: Banner Text
138	92	8A5C	Mask Sprite
138	232	8AE8	Clear Mask Scratch
138	247	8AF7	Position Mask Sprite
139	82	8B52	Reload Mask Cache
139	115	8B73	Draw Object Sprite
139	165	8BA5	Blank Play Area
139	187	8BBB	Draw HUD Panel
140	1	8C01	Draw Gauge
140	62	8C3E	Flash Score Label
140	95	8C5F	Unset Flash Text
140	108	8C6C	Flash 2UP Score Label
140	113	8C71	Handler: Jetman
140	188	8CBC	Handler: Jetman Walk
141	6	8D06	Handler: Jetman Movement
142	90	8E5A	Face Jetman Right
142	197	8EC5	Face Jetman Left
143	52	8F34	Apply Upward Thrust
143	97	8F61	Clear Jetman Thrust
143	106	8F6A	Controls: Cursor Joystick
143	144	8F90	Handler: Controls
143	155	8F9B	Controls: Kempston Joystick
143	159	8F9F	Controls: Keyboard
143	244	8FF4	Land Jetman
144	5	9005	Launch Jetman
144	32	9020	Initialise Jetman
144	123	907B	Apply Jetman Speed
145	92	915C	Draw New Column
145	124	917C	Draw Terrain Column
145	158	919E	Locate Terrain Cell
145	187	91BB	Read Terrain Cell
145	226	91E2	Handler: Moon Rover
147	12	930C	Board Moon Rover
147	62	933E	Test Space Key
147	86	9356	Draw Terrain
147	149	9395	Find Unused Alien Slot
147	166	93A6	Place Actor At Scroll
147	232	93E8	Handler: Falling Platform
148	92	945C	Test Action Key
148	102	9466	Spawn Alien
149	49	9531	Handler: Meteor
149	182	95B6	Stamp Terrain Tile
150	84	9654	Handler: Drifting Alien
151	14	970E	Handler: Mr Magnetic Brella
152	132	9884	Test Alien Beside Slot
152	174	98AE	Clear Terrain Under Actor
153	6	9906	Handler: The Block
153	60	993C	Handler: Bouncing Wheel
153	148	9994	Handler: Spinner
154	47	9A2F	Handler: Saturn
154	226	9AE2	Handler: Shooter
155	187	9BBB	Handler: The Pip
156	35	9C23	Set Default Values
156	58	9C3A	Alien States
156	250	9CFA	Alien Lookup Table
157	90	9D5A	Jetman Default Data
157	114	9D72	Levels Alien Lookup Table
157	128	9D80	Default Hall Of Fame Names
157	152	9D98	Default High Score
157	176	9DB0	Jetman Tune Table
157	192	9DC0	Handler: Laser Beam
158	44	9E2C	Animate: Laser Beam
158	202	9ECA	Animate From Scroll
158	220	9EDC	Handler: Rover Frames
159	94	9F5E	Initialise Objects
159	106	9F6A	Step Pickup Candidate
159	112	9F70	Handler: Pickups
160	2	A002	Wrap World X
160	8	A008	Object Defaults
160	104	A068	Pickup Defaults
160	248	A0F8	Handler: Pickup Action
161	170	A1AA	Handler: Pickup
162	83	A253	Fill Pickup Debris
162	114	A272	Animate Pickup Debris
162	153	A299	Start Teleport
162	207	A2CF	Finish Teleport
162	245	A2F5	Clear Sprite Caches
163	10	A30A	Resume Pickup
163	19	A313	Pickup Colours
163	23	A317	Handler: Reset Laser Beam Slots
163	37	A325	Handler: World Object
163	120	A378	Release Carried Item
163	156	A39C	Attach Carried Item
163	193	A3C1	Place Carried Item
163	255	A3FF	Handler: Held Object
164	186	A4BA	Compare Actor Distance
164	231	A4E7	Test Jetman Action
165	34	A522	Clamp Object To Ground
165	58	A53A	Spawn Linked Object
165	121	A579	Handler: Player Shot
167	60	A73C	Start Small Explosion
167	66	A742	Handler: Small Explosion
167	93	A75D	Start Crater
167	102	A766	Start Explosion
167	131	A783	Handler: Sparkle Burst
167	146	A792	Fragment Colours
167	150	A796	Test Laser Hits
167	226	A7E2	Test One Hit
168	28	A81C	Handler: Player Shot Launch
168	38	A826	Initialise New Level
168	76	A84C	Initialise New Game
168	128	A880	1UP/ 2UP Swapper
168	181	A8B5	Lose Life
168	227	A8E3	Game Over
169	75	A94B	Messaging: Game Over
169	147	A993	Move Debris Particle
170	75	AA4B	Debris Particles
170	155	AA9B	Animate Debris
170	223	AADF	Debris Defaults
171	47	AB2F	Initialise Debris
171	72	AB48	Animate Debris Burst
171	157	AB9D	Copy Debris Template
171	169	ABA9	Draw Current Actor
171	186	ABBA	Handler: Missile Launcher
172	57	AC39	Align To Rover
173	0	AD00	Handler: Colourise 2x2
173	11	AD0B	Flash Attribute
173	23	AD17	Flash Attribute Alternative
173	34	AD22	Colourise Banner
173	51	AD33	Clear Banner Colour
173	54	AD36	Test Actor Side
173	89	AD59	Handler: Alien Base
173	171	ADAB	Handler: Upward Missile
173	234	ADEA	Handler: Upward Missile Flame
174	55	AE37	Handler: Missile Spawner
174	120	AE78	Spawn Missile
175	28	AF1C	Handler: Sideways Missile
176	59	B03B	Convert To Debris
176	101	B065	Handler: Sideways Missile Flame
176	209	B0D1	Test Target Range
177	29	B11D	Explode Object Slots
177	40	B128	Handler: Alien Base Plasma
177	111	B16F	Convert Object Slots
177	164	B1A4	Animate Crater
177	211	B1D3	Scan Object Slots
177	233	B1E9	Advance Position
178	15	B20F	Score Small Hit
178	24	B218	Tick Then Explode
178	162	B2A2	Test Jetman Range
178	215	B2D7	Kill Jetman
178	249	B2F9	Drop World Objects
179	57	B339	Bounce Jetman Right
179	61	B33D	Tick Actor Frame
179	123	B37B	Explode At Ground
179	133	B385	Reset Alien States
179	144	B390	Count Death Timer
179	163	B3A3	Message: Teleporting
179	208	B3D0	Messaging: Teleporting
179	220	B3DC	Initialise Terrain
179	232	B3E8	Handler: Jetman Death
180	96	B460	Handler: Falling Sprite
180	194	B4C2	Fill Debris Slots
181	46	B52E	Show Laser Estimate
181	148	B594	Messaging: Missile Launch
181	220	B5DC	Messaging: Missile Launch
182	153	B699	Convert To Base 10
182	174	B6AE	Move By Speed
182	207	B6CF	Dispatch Object State
182	235	B6EB	Ignore Object State
182	236	B6EC	Handler: Armed Bomb
183	49	B731	Handler: Bombs
183	133	B785	Collect Bomb
183	168	B7A8	Handler: Bomb
183	188	B7BC	Carry Bomb
184	16	B810	Fly Thrown Bomb
184	126	B87E	Colourise Rover Lights
184	154	B89A	Tick Object Timer
184	168	B8A8	Sounds: Laser Beam
184	180	B8B4	Sounds: Laser Missile Hit
184	189	B8BD	Sounds: Take Object
184	195	B8C3	Sounds: Drop Item
184	201	B8C9	Sounds: Pickup Item
184	212	B8D4	Sounds: Short Beep
184	218	B8DA	Play Square Wave
184	232	B8E8	Play Repeated Tone
184	242	B8F2	Sounds: Debris
184	255	B8FF	Sounds: Explosion
185	24	B918	Play Inverted Tone
185	34	B922	Tick Wave Duration
185	45	B92D	Play Wave Sequence
185	52	B934	Tick Wave Table
185	75	B94B	End Sound
185	80	B950	Initialise Explosion
185	188	B9BC	Queue Tune
185	210	B9D2	Tune Data
186	158	BA9E	Menu Tune Table
186	164	BAA4	Player Tune Table
186	168	BAA8	Tune Data Extra
186	190	BABE	Sprite Table Origin
186	192	BAC0	Sprite Table
188	158	BC9E	Graphic: Moon Rover Attributes
188	188	BCBC	Sprite: None
188	190	BCBE	Sprite: Jetman Walking
189	204	BDCC	Sprite: Jetman Flying
190	144	BE90	Graphic: Moon Rover
208	116	D074	Sprite: Teleporter
209	80	D150	Unused
209	81	D151	The UDG for the lives icon
209	89	D159	Sprite: Player Shot
209	103	D167	Sprite: Turret
211	71	D347	Main Font
213	159	D59F	Sprite: The Blob
214	151	D697	Sprite: Meteor
215	159	D79F	Sprite: Sparkle Burst
216	112	D870	Sprite: Player Shot
216	126	D87E	Sprite: Small Explosion
216	148	D894	Sprite: Mr Magnetic Brella
217	118	D976	Sprite: Platform
217	135	D987	Sprite: Missile Launcher
221	151	DD97	UDG Graphics
222	95	DE5F	HUD Panel Layout
222	185	DEB9	HUD Panel Attributes
223	19	DF13	Graphic: Alien Base
225	147	E193	Sprite: Missile
225	213	E1D5	Sprite: Unused
226	59	E23B	Sprite: Missile Flame
226	167	E2A7	Sprite: The Block
227	143	E38F	Sprite: Missile
227	181	E3B5	Sprite: Missile Flame
228	1	E401	Sprite: Unused
228	154	E49A	Sprite: Unused
229	51	E533	Sprite: Alien Base Plasma
229	223	E5DF	Sprite: Crater
230	223	E6DF	Sprite: Linked Object
231	3	E703	Sprite: Saturn
232	72	E848	Sprite: Spinner
233	16	E910	Sprite: Jetman Falling
233	156	E99C	Sprite: Shooter
234	131	EA83	Sprite: The Pip
234	141	EA8D	Graphic: Explosion
237	81	ED51	Sprite: Bouncing Wheel
238	23	EE17	Sprite: Bomb
238	122	EE7A	Odd-Level Sprite Table
238	182	EEB6	Unused
238	186	EEBA	Sprite: Tubular Grabber
239	162	EFA2	Sprite: The Cross
240	170	F0AA	Sprite: Sparkle
241	106	F16A	Sprite: The Dog
242	50	F232	Print Rank Message
242	116	F274	Messaging: High Score Suffixes
242	149	F295	Handle Name Input
243	62	F33E	Return To Restart
243	69	F345	Insert High Score
243	191	F3BF	Compare High Scores
244	16	F410	Show Hall Of Fame
244	170	F4AA	Messaging: Hall Of Fame
244	198	F4C6	Handler: High Score Messaging
244	251	F4FB	Messaging: High Score
245	53	F535	Prepare Name Entry
245	110	F56E	Handler: New High Score
245	227	F5E3	Start Name Entry
245	236	F5EC	Print 1UP/ 2UP Levels
246	65	F641	Get Level Digits
246	88	F658	Get Inactive Level Digits
246	98	F662	Helper: Colour Levels Messaging Green
246	110	F66E	Terrain UDGs
246	206	F6CE	Default Terrain Data
250	206	FACE	Unused
255	68	FF44	Tune Buffer
255	84	FF54	Tune Pointer
255	86	FF56	Unused
255	136	FF88	Unused