Memory map

Page	Byte	Address	Description
64	0	16384	Loading screen
91	128	23424	Decryption Routine
92	176	23728	Indirect Jump
94	0	24064	Game Options
94	1	24065	Game status buffer entry at 5E01
94	4	24068	Font Pointer
94	6	24070	High Score
94	9	24073	Game status buffer entry at 5E09
94	32	24096	Game status buffer entry at 5E20
94	53	24117	Game status buffer entry at 5E35
94	56	24120	Game status buffer entry at 5E38
94	64	24128	Game status buffer entry at 5E40
94	66	24130	Game status buffer entry at 5E42
94	80	24144	Game status buffer entry at 5E50
94	82	24146	Frame Updated
94	83	24147	Last Frame
94	86	24150	Game status buffer entry at 5E56
94	87	24151	Game status buffer entry at 5E57
94	88	24152	Game status buffer entry at 5E58
94	89	24153	Game status buffer entry at 5E59
94	90	24154	Game status buffer entry at 5E5A
94	93	24157	Game status buffer entry at 5E5D
94	94	24158	Game status buffer entry at 5E5E
94	95	24159	1UP Score
94	98	24162	2UP Score
94	101	24165	Active Player
94	102	24166	Current menu item colour attribute
94	103	24167	Game Delay Timer
94	104	24168	Game status buffer entry at 5E68
94	105	24169	Game status buffer entry at 5E69
94	108	24172	Game status buffer entry at 5E6C
94	109	24173	Game status buffer entry at 5E6D
94	111	24175	Game status buffer entry at 5E6F
94	113	24177	Number of players?
94	115	24179	Game status buffer entry at 5E73
94	116	24180	Game status buffer entry at 5E74
94	117	24181	Game status buffer entry at 5E75
94	119	24183	High Score Position
94	120	24184	Game status buffer entry at 5E78
94	124	24188	Game status buffer entry at 5E7C
94	160	24224	Active Player Level
94	161	24225	Active Player Lives
94	162	24226	Game status buffer entry at 5EA2
94	163	24227	Game status buffer entry at 5EA3
94	164	24228	Inactive Player Level
94	165	24229	Inactive Player Lives
94	166	24230	Game status buffer entry at 5EA6
94	167	24231	Game status buffer entry at 5EA7
96	0	24576	Laser Beam Parameters
96	96	24672	Data block at 6060
96	142	24718	Fuel Level
96	144	24720	Data block at 6090
96	146	24722	Data block at 6092
96	196	24772	Data block at 60C4
97	8	24840	Data block at 6108
97	130	24962	Data block at 6182
97	149	24981	Data block at 6195
97	152	24984	Bomb States?
97	176	25008	Alien States
98	64	25152	Data block at 6240
112	0	28672	Active Terrain Data
116	0	29696	Inactive Terrain Data
120	0	30720	Data block at 7800
128	0	32768	Security Check
128	10	32778	Game Initialisation
128	44	32812	Game Restart
128	209	32977	Game Selection Menu
128	253	33021	Routine at 80FD
129	14	33038	Game Select Attribute Table
129	21	33045	Game Select Y Position Table
129	28	33052	Messaging: Game Selection Title
129	138	33162	Messaging: Copyright
129	171	33195	Write Menu Line
129	187	33211	Start Game
130	9	33289	Routine at 8209
130	47	33327	Routine at 822F
130	63	33343	Routine at 823F
130	74	33354	Limit Frame Rate
130	88	33368	Routine at 8258
130	152	33432	Controls: Pause
130	197	33477	Jump Table
132	173	33965	Reset Screen Buffer
132	180	33972	Reset Routine
132	187	33979	Reset Attribute Buffer
132	216	34008	Create Game Window
132	247	34039	Reset Planet
133	6	34054	Calculate Attribute Address
133	30	34078	Calculate Screen Address
133	61	34109	Routine at 853D
133	104	34152	Routine at 8568
133	127	34175	Routine at 857F
133	142	34190	Routine at 858E
133	217	34265	Data block at 85D9
133	246	34294	Screen Address One Pixel Above
134	6	34310	Routine at 8606
134	20	34324	Routine at 8614
134	79	34383	Routine at 864F
134	94	34398	Routine at 865E
134	127	34431	Routine at 867F
134	161	34465	Routine at 86A1
135	1	34561	Routine at 8701
135	51	34611	Routine at 8733
135	124	34684	Routine at 877C
135	135	34695	Routine at 8787
135	185	34745	Routine at 87B9
136	7	34823	Routine at 8807
136	38	34854	Routine at 8826
136	145	34961	Routine at 8891
136	163	34979	Routine at 88A3
136	177	34993	Routine at 88B1
136	232	35048	Routine at 88E8
137	10	35082	Routine at 890A
137	49	35121	Routine at 8931
137	71	35143	Routine at 8947
137	79	35151	Display Lives
137	156	35228	Add Points To Score
137	191	35263	Print Scores
137	239	35311	Print Character
138	17	35345	Print Colour String
138	55	35383	Print Banner
138	81	35409	Messaging: Banner Text
138	92	35420	Routine at 8A5C
139	115	35699	Routine at 8B73
139	165	35749	Routine at 8BA5
139	187	35771	Draw HUD Panel
140	1	35841	Draw Gauge
140	62	35902	Flash Score Label
140	113	35953	Routine at 8C71
140	188	36028	Routine at 8CBC
141	6	36102	Routine at 8D06
142	90	36442	Routine at 8E5A
142	197	36549	Routine at 8EC5
143	52	36660	Routine at 8F34
143	97	36705	Routine at 8F61
143	106	36714	Controls: Cursor Joystick
143	144	36752	Handler: Controls
143	155	36763	Controls: Kempston Joystick
143	159	36767	Controls: Keyboard
143	244	36852	Routine at 8FF4
144	5	36869	Routine at 9005
144	32	36896	Routine at 9020
144	123	36987	Routine at 907B
145	124	37244	Routine at 917C
145	158	37278	Routine at 919E
145	187	37307	Routine at 91BB
145	226	37346	Routine at 91E2
147	12	37644	Routine at 930C
147	62	37694	Routine at 933E
147	86	37718	Draw Terrain?
147	149	37781	Find Unused Alien Slot
147	166	37798	Routine at 93A6
148	92	37980	Routine at 945C
148	102	37990	Routine at 9466
149	49	38193	Routine at 9531
149	182	38326	Routine at 95B6
150	84	38484	Routine at 9654
151	14	38670	Routine at 970E
156	35	39971	Set Default Values
156	58	39994	Alien States
156	250	40186	Alien Lookup Table
157	90	40282	Data block at 9D5A
157	114	40306	Levels Alien Lookup Table
157	128	40320	Data block at 9D80
157	152	40344	Data block at 9D98
157	176	40368	Data block at 9DB0
157	192	40384	Handler: Laser Beam
158	44	40492	Animate: Laser Beam
158	202	40650	Routine at 9ECA
158	220	40668	Routine at 9EDC
159	94	40798	Routine at 9F5E
159	106	40810	Routine at 9F6A
160	8	40968	Data block at A008
160	104	41064	Data block at A068
160	248	41208	Routine at A0F8
161	170	41386	Routine at A1AA
162	245	41717	Routine at A2F5
163	10	41738	Routine at A30A
163	19	41747	Data block at A313
163	23	41751	Handler: Reset Laser Beam Slots
163	37	41765	Routine at A325
163	120	41848	Routine at A378
163	156	41884	Routine at A39C
163	193	41921	Routine at A3C1
163	255	41983	Routine at A3FF
164	186	42170	Routine at A4BA
164	231	42215	Routine at A4E7
165	34	42274	Routine at A522
165	58	42298	Routine at A53A
165	121	42361	Routine at A579
167	60	42812	Routine at A73C
167	102	42854	Routine at A766
167	150	42902	Routine at A796
167	226	42978	Routine at A7E2
168	38	43046	Initialise New Level
168	76	43084	Initialise New Game
168	128	43136	1UP/ 2UP Swapper
168	181	43189	Routine at A8B5
168	227	43235	Game Over
169	75	43339	Messaging: Game Over
169	147	43411	Routine at A993
170	155	43675	Routine at AA9B
171	47	43823	Routine at AB2F
171	72	43848	Routine at AB48
171	157	43933	Routine at AB9D
171	169	43945	Routine at ABA9
172	57	44089	Routine at AC39
173	0	44288	Handler: Colourise 2x2
173	11	44299	Routine at AD0B
173	34	44322	Routine at AD22
173	51	44339	Routine at AD33
173	54	44342	Routine at AD36
177	164	45476	Routine at B1A4
177	211	45523	Routine at B1D3
177	233	45545	Routine at B1E9
178	15	45583	Routine at B20F
178	24	45592	Routine at B218
178	249	45817	Routine at B2F9
179	57	45881	Routine at B339
179	61	45885	Routine at B33D
179	123	45947	Routine at B37B
179	133	45957	Reset Alien States
179	144	45968	Routine at B390
179	163	45987	Message: Teleporting
179	208	46032	Messaging: Teleporting
179	220	46044	Initialise Terrain
179	232	46056	Routine at B3E8
180	96	46176	Routine at B460
180	194	46274	Routine at B4C2
181	46	46382	Routine at B52E
181	148	46484	Messaging: Missile Launch
181	220	46556	Messaging: Missile Launch
182	153	46745	Convert To Base 10
182	174	46766	Routine at B6AE
182	207	46799	Routine at B6CF
182	235	46827	Routine at B6EB
182	236	46828	Routine at B6EC
183	49	46897	Routine at B731
183	133	46981	Routine at B785
183	168	47016	Handler: Bomb
183	188	47036	Routine at B7BC
184	16	47120	Routine at B810
184	126	47230	Routine at B87E
184	154	47258	Routine at B89A
184	168	47272	Sounds: Laser Beam
184	180	47284	Sounds: Laser Missile Hit
184	189	47293	Routine at B8BD
184	195	47299	Routine at B8C3
184	201	47305	Sounds: Pickup Item
184	212	47316	Routine at B8D4
184	218	47322	Play square wave sound
184	232	47336	Routine at B8E8
184	242	47346	Routine at B8F2
184	255	47359	Routine at B8FF
185	24	47384	Routine at B918
185	34	47394	Routine at B922
185	45	47405	Play Wave Sequence
185	52	47412	Routine at B934
185	75	47435	Sound: Finish Effect
185	80	47440	Routine at B950
185	188	47548	Routine at B9BC
185	210	47570	Data block at B9D2
186	158	47774	Data block at BA9E
186	164	47780	Data block at BAA4
186	168	47784	Data block at BAA8
186	190	47806	Data block at BABE
186	192	47808	Sprite Table
188	158	48286	Data block at BC9E
188	188	48316	Sprite: None
188	190	48318	Sprite: Jetman Walking
189	204	48588	Sprite: Jetman Flying
190	144	48784	Graphic: Moon Rover
208	116	53364	Sprite: Teleporter
209	80	53584	Data block at D150
209	81	53585	The UDG for the lives icon
209	89	53593	Data block at D159
209	96	53600	Data block at D160
209	103	53607	Sprite: Turret
211	71	54087	Main Font
213	159	54687	Sprite: The Blob
214	151	54935	Sprite: Meteor
215	159	55199	Sprite: Sparkle
216	112	55408	Data block at D870
216	118	55414	Data block at D876
216	126	55422	Data block at D87E
216	136	55432	Data block at D888
216	148	55444	Sprite: Mr Magnetic Brella
217	118	55670	Sprite: Platform
217	135	55687	Sprite: Missile Launcher
221	151	56727	UDG Graphics
222	95	56927	HUD Panel Layout
222	185	57017	HUD Panel Attributes
223	19	57107	Graphic: Alien Base
225	147	57747	Sprite: Missile
225	213	57813	Data block at E1D5
226	59	57915	Sprite: Missile Flame
226	167	58023	Sprite: The Block
227	143	58255	Sprite: Missile
227	181	58293	Sprite: Missile Flame
228	1	58369	Data block at E401
228	154	58522	Data block at E49A
229	51	58675	Sprite: Alien Base Plasma
229	223	58847	Data block at E5DF
230	232	59112	Data block at E6E8
230	241	59121	Data block at E6F1
230	250	59130	Data block at E6FA
231	3	59139	Sprite: Saturn
232	72	59464	Sprite: Spinner
233	16	59664	Sprite: Jetman Falling
233	156	59804	Sprite: Shooter
234	131	60035	Data block at EA83
234	136	60040	Data block at EA88
234	141	60045	Graphic: Explosion
237	81	60753	Sprite: Bouncing Wheel
238	23	60951	Sprite: Bomb
238	122	61050	Data block at EE7A
242	50	62002	New High Score Suffix
242	116	62068	Messaging: High Score Suffixes
242	149	62101	Routine at F295
243	62	62270	Routine at F33E
243	69	62277	Routine at F345
243	191	62399	Routine at F3BF
244	16	62480	Hall Of Fame
244	170	62634	Messaging: Hall Of Fame
244	198	62662	Handler: High Score Messaging
244	251	62715	Messaging: High Score
245	53	62773	Routine at F535
245	110	62830	Handler: New High Score
245	227	62947	Routine at F5E3
245	236	62956	Print 1UP/ 2UP Levels
246	65	63041	Active Player Level
246	98	63074	Helper: Colour Levels Messaging Green
246	110	63086	Terrain UDGs
246	206	63182	Default Terrain Data
250	206	64206	Data block at FACE
255	68	65348	Data block at FF44
255	84	65364	Data block at FF54
255	86	65366	Data block at FF56
255	136	65416	Data block at FF88