river-raid: Data

Page	Byte	Address	Description
64	0	4000	Screen pixels.
88	0	5800	Screen attributes.
88	32	5820	Screen attributes row 1.
90	32	5A20	Screen attributes row 16 (boundary for visible sprite area).
90	64	5A40	Screen attributes row 17 (start of lower screen area).
91	0	5B00	Screen row address lookup table (64 entries × 2 bytes = 128 bytes).
93	63	5D3F	Array of possible starting bridge values.
95	119	5F77	Current terrain profile number (0-7). Index into terrain sprite table at data_terrain_profiles. Loaded from first byte of level element at level_terrains.
105	59	693B	Terrain edge rendering counter
120	0	7800	Control type chosen from the dialog before the validation
120	1	7801	Overview mode flag ($00 - No, $01 - Yes)
120	2	7802	Stores the number of remaining iterations before the control choice dialog switches to overview mode
120	16	7810	Temporary stack pointer used by the control choice dialog
128	99	8063	River bank shape profiles (15 profiles × 16 bytes = 240 bytes).
130	93	825D	User-defined graphics data (13 characters).
130	197	82C5	Solid fill pattern (48 bytes of $FF).
130	245	82F5	Sprite erasure pattern (60 bytes of $00).
131	49	8331	Terrain pixels for pre/post bridge sections (2×16 bytes).
131	81	8351	Road and bridge pixel patterns (2×16 bytes).
131	113	8371	Road and bridge color attributes (2×16 bytes).
131	177	83B1	Player plane sprite (4 frames × 16 bytes).
131	241	83F1	Player plane banked sprite (4 frames × 16 bytes).
132	49	8431	Player missile sprite (4 frames × 8 bytes).
132	81	8451	Missile trail sprite (4 frames × 8 bytes).
132	113	8471	Explosion sprite frame 1 (2×1 tiles).
132	129	8481	Explosion sprite frame 2 (2×1 tiles).
132	145	8491	Explosion sprite frame 3 (2×1 tiles).
132	161	84A1	Array [4] of rock sprites (3×2 tiles, 48 bytes).
133	179	85B3	Array [5] arrays of enemy headed left sprites (each element is 3×1 tiles × 4 frames = 96 bytes).
135	147	8793	Array [5] arrays of enemy headed right sprites (each element is 3×1 tiles × 4 frames = 96 bytes).
137	114	8972	Array [4] of balloon sprites (2×2 tiles, 32 bytes).
137	242	89F2	Left terrain edge masks (4 widths: 10, 12, 14, 16 pixels).
137	250	89FA	Right terrain edge masks (4 widths: 16, 14, 12, 10 pixels).
138	134	8A86	Fuel sprite
138	184	8AB8	Helicopter rotor sprite (left-facing, 4 frames × 4 bytes).
138	200	8AC8	Helicopter rotor sprite (right-facing, 4 frames × 4 bytes).
143	252	8FFC	Tank shell explosion sprite (6 frames × 32 bytes).
146	58	923A	Game mode configuration byte
146	61	923D	Current active player ($01=PLAYER_1, $02=PLAYER_2).
149	0	9500	Level terrain data (48 levels × 256 bytes = 12,288 bytes).
198	0	C600	Island shape definitions (35 islands × 3 bytes = 105 bytes).
200	0	C800	Level object spawn data (48 levels × 256 bytes = 12,288 bytes total).