Memory map

Page	Byte	Address	Description
64	0	4000	Loading screen
91	0	5B00	Unused
95	0	5F00	Background Reference
95	1	5F01	Unused
95	2	5F02	Background screen buffer
95	16	5F10	Background address buffer
95	34	5F22	Change Background
95	128	5F80	Creates Background Image
96	16	6010	Unpack Background Attribute Data
96	43	602B	Background 1 Address References
96	61	603D	Background 2 Address References
96	79	604F	Background 3 Address References
96	97	6061	Background 1 Attribute Data
97	2	6102	Background 1 Positioning Data
97	87	6157	Background 1 Positioning Data
97	217	61D9	Background 1 Positioning Data
98	77	624D	Background 1 Positioning Data
98	106	626A	Background 1 Tile Data
100	138	648A	Background 1 Tile Data
104	90	685A	Background 1 Tile Data
106	226	6AE2	Background 1 Tile Data
107	130	6B82	Unused
107	131	6B83	Background 2 Attribute Data
108	75	6C4B	Background 2 Positioning Data
108	121	6C79	Background 2 Positioning Data
108	247	6CF7	Background 2 Positioning Data
109	121	6D79	Background 2 Positioning Data
109	174	6DAE	Background 2 Tile Data
110	150	6E96	Background 2 Tile Data
114	14	720E	Background 2 Tile Data
118	6	7606	Background 2 Tile Data
119	102	7766	Background 3 Attribute Data
120	79	784F	Background 3 Positioning Data
120	147	7893	Background 3 Positioning Data
121	16	7910	Background 3 Positioning Data
121	145	7991	Background 3 Positioning Data
121	177	79B1	Background 3 Tile Data
123	177	7BB1	Background 3 Tile Data
125	9	7D09	Background 3 Tile Data
127	57	7F39	Background 3 Tile Data
128	0	8000	Shadow Buffer
136	0	8800	Game Entry Point
136	3	8803	Routine at 8803
136	51	8833	Routine at 8833
136	152	8898	Routine at 8898
138	48	8A30	Routine at 8A30
138	209	8AD1	Routine at 8AD1
139	210	8BD2	Player 1 Controls
139	212	8BD4	Player 1 Redefined Keys
139	230	8BE6	Player 2 Controls
139	232	8BE8	Player 2 Redefined Keys
139	250	8BFA	Player 1 Default Keys
140	12	8C0C	Player 2 Default Keys
140	30	8C1E	Sinclair Joystick #2
140	48	8C30	Sinclair Joystick #1
140	66	8C42	Kempston Joystick
140	84	8C54	Game Settings
140	219	8CDB	Game Control Settings
141	153	8D99	Game Settings - Redefine Keys
142	66	8E42	Short Delay
142	76	8E4C	Clear Screen Buffer
142	105	8E69	Current Player Being Altered
142	107	8E6B	Messaging: "Player 1 Controls"
142	140	8E8C	Messaging: "Player 2 Controls"
142	153	8E99	Messaging: "Sound On"
142	166	8EA6	Messaging: "Sound Off"
142	179	8EB3	Messaging: "Options Type"
142	198	8EC6	Messaging: "Exit"
142	214	8ED6	Messaging: "Default Keyboard"
142	244	8EF4	Messaging: "Port 1 Sinclair"
143	15	8F0F	Messaging: "Port 2 Sinclair"
143	42	8F2A	Messaging: "Reconfigure Keyboard"
143	65	8F41	Messaging: "Kempston"
143	89	8F59	Messaging: "Choose Control Type"
143	107	8F6B	Messaging: "Change Keys" Line 1
143	137	8F89	Messaging: "Change Keys" Line 2
143	167	8FA7	Messaging: "Change Keys" Line 3
143	187	8FBB	Messaging: "Up"
143	190	8FBE	Messaging: "Up-Right"
143	199	8FC7	Messaging: "Right
143	205	8FCD	Messaging: "Down-Right"
143	216	8FD8	Messaging: "Down"
143	221	8FDD	Messaging: "Down-Left"
143	231	8FE7	Messaging: "Left"
143	236	8FEC	Messaging: "Up-Left"
143	244	8FF4	Messaging: "Fire"
144	0	9000	Messaging: "Blank" Text
144	14	900E	Yin-yang Controller
144	158	909E	New Round
144	208	90D0	Intro Music
146	0	9200	Draw Background
146	41	9229	Screen Address One Pixel Below
146	58	923A	Routine at 923A
146	85	9255	Print Yin-Yang To Screen
146	228	92E4	Print String
146	255	92FF	Expand Time Byte To ASCII
147	44	932C	Processes The Remaining Time String
147	104	9368	Data block at 9368
149	212	95D4	Routine at 95D4
151	69	9745	Routine at 9745
156	40	9C28	Game status buffer entry at 9C28
156	41	9C29	Game status buffer entry at 9C29
156	42	9C2A	Game status buffer entry at 9C2A
156	43	9C2B	Game status buffer entry at 9C2B
156	44	9C2C	Number of players.
156	45	9C2D	Game status buffer entry at 9C2D
156	46	9C2E	Game Entry Point
156	83	9C53	Read Key Input
156	110	9C6E	Unused
156	111	9C6F	Routine at 9C6F
156	147	9C93	Print Remaining Time
156	160	9CA0	Countdown Time
156	165	9CA5	Time
156	166	9CA6	Routine at 9CA6
158	210	9ED2	Routine at 9ED2
163	255	A3FF	Random Number
164	2	A402	Routine at A402
166	71	A647	New High Score?
166	133	A685	Print Hi-Score
166	151	A697	Check Player Score Against High Score
166	182	A6B6	Game status buffer entry at A6B6
166	183	A6B7	Game status buffer entry at A6B7
170	0	AA00	Game status buffer entry at AA00
170	1	AA01	1UP Yin-yang count.
170	6	AA06	Demo Mode
170	64	AA40	Game status buffer entry at AA40
170	65	AA41	Game status buffer entry at AA41
170	156	AA9C	Message at AA9C
170	220	AADC	Routine at AADC
171	112	AB70	Demo Mode
171	200	ABC8	Routine at ABC8
172	5	AC05	Main Game Loop
172	62	AC3E	Start 1UP Game
173	156	AD9C	Start 2UP Game
174	38	AE26	Routine at AE26
174	191	AEBF	Print The Current Dan (or "NOVICE") Message
174	248	AEF8	Initialise Time Counter
175	1	AF01	Routine at AF01
175	11	AF0B	Reset Score
175	26	AF1A	Routine at AF1A
175	39	AF27	Routine at AF27
175	51	AF33	Game status buffer entry at AF33
175	52	AF34	Current Background
175	53	AF35	Game status buffer entry at AF35
175	54	AF36	Routine at AF36
175	218	AFDA	Routine at AFDA
176	11	B00B	Data block at B00B
176	36	B024	Message at B024
176	57	B039	Messaging: "Demo"
176	62	B03E	Messaging: "Player"
176	69	B045	Messaging: "Novice"
176	77	B04D	Messaging: Suffixes
176	89	B059	Messaging: "Dan"
176	94	B05E	Current Rank
176	96	B060	Messaging: "Whitespace"
176	106	B06A	Data block at B06A
177	56	B138	Game Initialisation
177	68	B144	Data block at B144
177	90	B15A	Routine at B15A
178	250	B2FA	Sound Flag
178	251	B2FB	Routine at B2FB
184	0	B800	UDGs
191	19	BF13	Draw Sprites?
193	1	C101	Routine at C101
193	162	C1A2	Routine at C1A2
193	204	C1CC	Routine at C1CC
193	246	C1F6	Routine at C1F6
194	3	C203	Screen Calculation
194	52	C234	Routine at C234
194	181	C2B5	Routine at C2B5
195	5	C305	Routine at C305
195	25	C319	Routine at C319
195	79	C34F	Routine at C34F
195	110	C36E	Routine at C36E
195	228	C3E4	Routine at C3E4
196	7	C407	Data block at C407
196	9	C409	Player 1 Screen Position
196	11	C40B	Game status buffer entry at C40B
196	16	C410	Game status buffer entry at C410
196	17	C411	Game status buffer entry at C411
196	18	C412	Game status buffer entry at C412
196	20	C414	Game status buffer entry at C414
196	27	C41B	Game status buffer entry at C41B
196	31	C41F	Game status buffer entry at C41F
196	33	C421	Game status buffer entry at C421
196	35	C423	Game status buffer entry at C423
196	37	C425	Game status buffer entry at C425
196	39	C427	Data block at C427
196	52	C434	Data block at C434
196	54	C436	Data block at C436