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	Game status buffer entry at 5E01
94	4	5E04	Font Pointer
94	6	5E06	High Score
94	9	5E09	Game status buffer entry at 5E09
94	32	5E20	Game status buffer entry at 5E20
94	53	5E35	Game status buffer entry at 5E35
94	56	5E38	Game status buffer entry at 5E38
94	64	5E40	Game status buffer entry at 5E40
94	66	5E42	Game status buffer entry at 5E42
94	80	5E50	Game status buffer entry at 5E50
94	82	5E52	Frame Updated
94	83	5E53	Last Frame
94	86	5E56	Game status buffer entry at 5E56
94	87	5E57	Game status buffer entry at 5E57
94	88	5E58	Game status buffer entry at 5E58
94	89	5E59	Game status buffer entry at 5E59
94	90	5E5A	Game status buffer entry at 5E5A
94	93	5E5D	Game status buffer entry at 5E5D
94	94	5E5E	Game status buffer entry at 5E5E
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	Game status buffer entry at 5E68
94	105	5E69	Game status buffer entry at 5E69
94	108	5E6C	Game status buffer entry at 5E6C
94	109	5E6D	Game status buffer entry at 5E6D
94	111	5E6F	Game status buffer entry at 5E6F
94	113	5E71	Number of players?
94	115	5E73	Game status buffer entry at 5E73
94	116	5E74	Game status buffer entry at 5E74
94	117	5E75	Game status buffer entry at 5E75
94	119	5E77	High Score Position
94	120	5E78	Game status buffer entry at 5E78
94	124	5E7C	Game status buffer entry at 5E7C
94	160	5EA0	Active Player Level
94	161	5EA1	Active Player Lives
94	162	5EA2	Game status buffer entry at 5EA2
94	163	5EA3	Game status buffer entry at 5EA3
94	164	5EA4	Inactive Player Level
94	165	5EA5	Inactive Player Lives
94	166	5EA6	Game status buffer entry at 5EA6
94	167	5EA7	Game status buffer entry at 5EA7
96	0	6000	Laser Beam Parameters
96	96	6060	Data block at 6060
96	142	608E	Fuel Level
96	144	6090	Data block at 6090
96	146	6092	Data block at 6092
96	196	60C4	Data block at 60C4
97	8	6108	Data block at 6108
97	130	6182	Data block at 6182
97	149	6195	Data block at 6195
97	152	6198	Bomb States?
97	176	61B0	Alien States
98	64	6240	Data block at 6240
112	0	7000	Active Terrain Data
116	0	7400	Inactive Terrain Data
120	0	7800	Data block at 7800
128	0	8000	Security Check
128	10	800A	Game Initialisation
128	44	802C	Game Restart
128	209	80D1	Game Selection Menu
128	253	80FD	Routine at 80FD
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	Routine at 8209
130	47	822F	Routine at 822F
130	63	823F	Routine at 823F
130	74	824A	Limit Frame Rate
130	88	8258	Routine at 8258
130	152	8298	Controls: Pause
130	197	82C5	Jump Table
132	173	84AD	Reset Screen Buffer
132	180	84B4	Reset Routine
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	Routine at 853D
133	104	8568	Routine at 8568
133	127	857F	Routine at 857F
133	142	858E	Routine at 858E
133	217	85D9	Data block at 85D9
133	246	85F6	Screen Address One Pixel Above
134	6	8606	Routine at 8606
134	20	8614	Routine at 8614
134	79	864F	Routine at 864F
134	94	865E	Routine at 865E
134	127	867F	Routine at 867F
134	161	86A1	Routine at 86A1
135	1	8701	Routine at 8701
135	51	8733	Routine at 8733
135	124	877C	Routine at 877C
135	135	8787	Routine at 8787
135	185	87B9	Routine at 87B9
136	7	8807	Routine at 8807
136	38	8826	Routine at 8826
136	145	8891	Routine at 8891
136	163	88A3	Routine at 88A3
136	177	88B1	Routine at 88B1
136	232	88E8	Routine at 88E8
137	10	890A	Routine at 890A
137	49	8931	Routine at 8931
137	71	8947	Routine at 8947
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	Routine at 8A5C
139	115	8B73	Routine at 8B73
139	165	8BA5	Routine at 8BA5
139	187	8BBB	Draw HUD Panel
140	1	8C01	Draw Gauge
140	62	8C3E	Flash Score Label
140	113	8C71	Routine at 8C71
140	188	8CBC	Routine at 8CBC
141	6	8D06	Routine at 8D06
142	90	8E5A	Routine at 8E5A
142	197	8EC5	Routine at 8EC5
143	52	8F34	Routine at 8F34
143	97	8F61	Routine at 8F61
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	Routine at 8FF4
144	5	9005	Routine at 9005
144	32	9020	Routine at 9020
144	123	907B	Routine at 907B
145	124	917C	Routine at 917C
145	158	919E	Routine at 919E
145	187	91BB	Routine at 91BB
145	226	91E2	Routine at 91E2
147	12	930C	Routine at 930C
147	62	933E	Routine at 933E
147	86	9356	Draw Terrain?
147	149	9395	Find Unused Alien Slot
147	166	93A6	Routine at 93A6
148	92	945C	Routine at 945C
148	102	9466	Routine at 9466
149	49	9531	Routine at 9531
149	182	95B6	Routine at 95B6
150	84	9654	Routine at 9654
151	14	970E	Routine at 970E
156	35	9C23	Set Default Values
156	58	9C3A	Alien States
156	250	9CFA	Alien Lookup Table
157	90	9D5A	Data block at 9D5A
157	114	9D72	Levels Alien Lookup Table
157	128	9D80	Data block at 9D80
157	152	9D98	Data block at 9D98
157	176	9DB0	Data block at 9DB0
157	192	9DC0	Handler: Laser Beam
158	44	9E2C	Animate: Laser Beam
158	202	9ECA	Routine at 9ECA
158	220	9EDC	Routine at 9EDC
159	94	9F5E	Routine at 9F5E
159	106	9F6A	Routine at 9F6A
160	8	A008	Data block at A008
160	104	A068	Data block at A068
160	248	A0F8	Routine at A0F8
161	170	A1AA	Routine at A1AA
162	245	A2F5	Routine at A2F5
163	10	A30A	Routine at A30A
163	19	A313	Data block at A313
163	23	A317	Handler: Reset Laser Beam Slots
163	37	A325	Routine at A325
163	120	A378	Routine at A378
163	156	A39C	Routine at A39C
163	193	A3C1	Routine at A3C1
163	255	A3FF	Routine at A3FF
164	186	A4BA	Routine at A4BA
164	231	A4E7	Routine at A4E7
165	34	A522	Routine at A522
165	58	A53A	Routine at A53A
165	121	A579	Routine at A579
167	60	A73C	Routine at A73C
167	102	A766	Routine at A766
167	150	A796	Routine at A796
167	226	A7E2	Routine at A7E2
168	38	A826	Initialise New Level
168	76	A84C	Initialise New Game
168	128	A880	1UP/ 2UP Swapper
168	181	A8B5	Routine at A8B5
168	227	A8E3	Game Over
169	75	A94B	Messaging: Game Over
169	147	A993	Routine at A993
170	155	AA9B	Routine at AA9B
171	47	AB2F	Routine at AB2F
171	72	AB48	Routine at AB48
171	157	AB9D	Routine at AB9D
171	169	ABA9	Routine at ABA9
172	57	AC39	Routine at AC39
173	0	AD00	Handler: Colourise 2x2
173	11	AD0B	Routine at AD0B
173	34	AD22	Routine at AD22
173	51	AD33	Routine at AD33
173	54	AD36	Routine at AD36
177	164	B1A4	Routine at B1A4
177	211	B1D3	Routine at B1D3
177	233	B1E9	Routine at B1E9
178	15	B20F	Routine at B20F
178	24	B218	Routine at B218
178	249	B2F9	Routine at B2F9
179	57	B339	Routine at B339
179	61	B33D	Routine at B33D
179	123	B37B	Routine at B37B
179	133	B385	Reset Alien States
179	144	B390	Routine at B390
179	163	B3A3	Message: Teleporting
179	208	B3D0	Messaging: Teleporting
179	220	B3DC	Initialise Terrain
179	232	B3E8	Routine at B3E8
180	96	B460	Routine at B460
180	194	B4C2	Routine at B4C2
181	46	B52E	Routine at B52E
181	148	B594	Messaging: Missile Launch
181	220	B5DC	Messaging: Missile Launch
182	153	B699	Convert To Base 10
182	174	B6AE	Routine at B6AE
182	207	B6CF	Routine at B6CF
182	235	B6EB	Routine at B6EB
182	236	B6EC	Routine at B6EC
183	49	B731	Routine at B731
183	133	B785	Routine at B785
183	168	B7A8	Handler: Bomb
183	188	B7BC	Routine at B7BC
184	16	B810	Routine at B810
184	126	B87E	Routine at B87E
184	154	B89A	Routine at B89A
184	168	B8A8	Sounds: Laser Beam
184	180	B8B4	Sounds: Laser Missile Hit
184	189	B8BD	Routine at B8BD
184	195	B8C3	Routine at B8C3
184	201	B8C9	Sounds: Pickup Item
184	212	B8D4	Routine at B8D4
184	218	B8DA	Play square wave sound
184	232	B8E8	Routine at B8E8
184	242	B8F2	Routine at B8F2
184	255	B8FF	Routine at B8FF
185	24	B918	Routine at B918
185	34	B922	Routine at B922
185	45	B92D	Play Wave Sequence
185	52	B934	Routine at B934
185	75	B94B	Sound: Finish Effect
185	80	B950	Routine at B950
185	188	B9BC	Routine at B9BC
185	210	B9D2	Data block at B9D2
186	158	BA9E	Data block at BA9E
186	164	BAA4	Data block at BAA4
186	168	BAA8	Data block at BAA8
186	190	BABE	Data block at BABE
186	192	BAC0	Sprite Table
188	158	BC9E	Data block at BC9E
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	Data block at D150
209	81	D151	The UDG for the lives icon
209	89	D159	Data block at D159
209	96	D160	Data block at D160
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
216	112	D870	Data block at D870
216	118	D876	Data block at D876
216	126	D87E	Data block at D87E
216	136	D888	Data block at D888
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	Data block at E1D5
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	Data block at E401
228	154	E49A	Data block at E49A
229	51	E533	Sprite: Alien Base Plasma
229	223	E5DF	Data block at E5DF
230	232	E6E8	Data block at E6E8
230	241	E6F1	Data block at E6F1
230	250	E6FA	Data block at E6FA
231	3	E703	Sprite: Saturn
232	72	E848	Sprite: Spinner
233	16	E910	Sprite: Jetman Falling
233	156	E99C	Sprite: Shooter
234	131	EA83	Data block at EA83
234	136	EA88	Data block at EA88
234	141	EA8D	Graphic: Explosion
237	81	ED51	Sprite: Bouncing Wheel
238	23	EE17	Sprite: Bomb
238	122	EE7A	Data block at EE7A
242	50	F232	New High Score Suffix
242	116	F274	Messaging: High Score Suffixes
242	149	F295	Routine at F295
243	62	F33E	Routine at F33E
243	69	F345	Routine at F345
243	191	F3BF	Routine at F3BF
244	16	F410	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	Routine at F535
245	110	F56E	Handler: New High Score
245	227	F5E3	Routine at F5E3
245	236	F5EC	Print 1UP/ 2UP Levels
246	65	F641	Active Player Level
246	98	F662	Helper: Colour Levels Messaging Green
246	110	F66E	Terrain UDGs
246	206	F6CE	Default Terrain Data
250	206	FACE	Data block at FACE
255	68	FF44	Data block at FF44
255	84	FF54	Data block at FF54
255	86	FF56	Data block at FF56
255	136	FF88	Data block at FF88