Contra - RAM Map

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11: Temporary Storage for Player Index (0-1)
12
13
14
15
16
17: Bullet Counter per Shot
18: Game Mode
19: Routine Index for Ending
1A: Permanent Frame Counter
1B
1C: Demo Mode (0 = Not in Demo Mode)
1D
1E
1F
20
21: Index for PPU Tile Mapping
22: Number of Players (0 = 1 Player)
23
24: 30-lives Code Switch (1 = Code Activated)
25: Pause State (1 = Game Paused)
26
27: Level of Demo Mode
28
29
2A: Various delays (low byte)
2B: Various delays (high byte)
2C: Routine Index for Main Game
2D: Routine Index for Ending Scene
2E
2F: Current Weapon Strength Code (0-3)
30: Current Level (0 = Level 1)
31: Game Completion Count
32: Player 1 Lives
33: Player 2 Lives
34: Randomizer
35: Variable related to sprites (alternate randomizer?)
36: Index for PPU Sprite Index
37: Indoor Screen Cleared (0 = Not Cleared)
38: Player 1 Game Over State (1 = Game Over)
39: Player 2 Game Over State (1 = Game Over)
3A: Continues Remaining
3B
3C: Player 1 Score for Extra Life - Low Byte
3D: Player 1 Score for Extra Life - High Byte
3E: Player 2 Score for Extra Life - Low Byte
3F: Player 2 Score for Extra Life - High Byte

40-5F: Level Header (20 bytes)

42: Line Index (Ending Credits)

60
61
62
63
64: Screen Number
65: Scrolling Offset (outdoor) / Movement from room to room (0-3) (indoor)
66
67
68: Level Scrolling Type (H/V) ?
69: Sprite Data Offset (6xx)
6A: HUD Display Switch
6B

6C
6D

6E
6F

70: Number of Tiles to Change for Boss Loading
71
72
73
74: Timer for Palette Change

75
76: Auto-Scroll Counter

77
78
79: Running Man Generation Routine Index
7A: Running Man Generation Coefficient (0 = No Generation)
7B: Generated Man Initial X Position on Screen
7C: Generated Man Initial Y Position on Screen
7D: Eagle Weapon Flash Timer
7F

80
81
82: Offset for Enemy Data
83: Temporary storage for X register (enemy index)
84
85: Number of Arms/Mortar Launchers Destroyed
86: Remaining Cores/Bosses to Destroy
87: Number of Boss Platings Destroyed
88: Enemy Cycles Counter
89
8A
8B
8C
8E: Enemy Attack Switch (1 = Enemies Attack)

X as player 0 or 1

90,X
92,X
94,X
96,X
98,X: Player X Velocity
9A,X
9C,X
9E,X
A0,X
A2,X
A4,X
A6,X

AA,X: Current Weapon Code
AC,X
AE,X: Timer for Invincibility (after dying)
B0,X: Timer for B Weapon Effect (decreases every 8 frames)
B2,X: Player Animation Frame in Water
B4,X: Player Death Flag (and more ?)
B6,X
B8,X
BA,X
BC,X
BE,X
C0,X
C2,X: Player Aim Code
C4,X
C6,X: Player Y Velocity
C8,X: Timer for Electrocution
CA,X
CC,X
CE,X
D0,X
D2,X
D4,X: Player X Acceleration
D6,X: Player Animation Frame (Sprite Code)
D8,X
DA,X

DF

E0: Sound Pointer - High Byte
E1: Sound Pointer - Low Byte

E4: Sound Pointer - High Byte
E5: Sound Pointer - Low Byte

E6
E8: related to sound...
E9
EA
EB

EC: Sound Pointer - High Byte
ED: Sound Pointer - Low Byte

F1: Controller 1 Buttons Held
F2: Controller 2 Buttons Held

F3: Temporary storage for Accumulator

F5: Controller 1 Buttons Pressed
F6: Controller 1 Buttons Pressed

F7: Temporary storage for Y register

F9,X

FC: Vertical Scroll Offset
FD: Horizontal Scroll Offset
FE
FF

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10A
122: Sound/Music Index
128
12D
12F

194
195
196

300
301

30A,X: Enemy Sprite Code

31A,X: Player Y Position on Screen
324,X: Enemy Y Position on Screen
334,X: Player X Position on Screen
33E,X: Enemy X Position on Screen

358,X: Enemy Sprite Attributes

x... ....	Vertical Flip
.x.. ....	Horizontal Flip
..x. ....	Sprite drawn behind background
...x ....	?
.... x...	Gun Recoil for Running/Rifle/Turret Man/Scuba Diver
.... .x..	Sprite has specific palette code
.... ..xx	Palette Code (if bit 2 is set)

368,X: Player Bullet Tile Code
378,X
388,X
398,X
3A8,X
3B8,X
3C8,X
3D8,X
3E8,X
3F8,X
408,X
418,X
428,X
438,X
448,X: Bullet Owner ? (0 = Player 1 ; 1 = Player 2)
458,X
468,X
478,X
488,X
498,X
4A8,X: Bullet Index per Shot ?

4B8,X: Enemy Routine Index (0 = Empty Enemy Slot)

4C8,X: Enemy Y Acceleration
4D8,X: Enemy X Acceleration
4E8,X: Enemy Y Velocity (high byte)
4F8,X: Enemy Y Velocity (low byte)
508,X: Enemy X Velocity (high byte)
518,X: Enemy X Velocity (low byte)

528,X: Enemy Type
538,X: Enemy Animation Frame Delay Counter
548,X: Bullet Hit Sound Index (0-3)
558,X: Delay Between Attacks
568,X: Enemy Animation Frame Code
578,X: Enemy HP
588,X: Collision, Explosion Type, Score Code

xxxx ....	Score Code
.... x...	Explosion Type
.... .xxx	Collision Code ?

598,X: ??? Enemy Facing Direction, Hit Flag (Bit 2) (and more)
5A8,X: Enemy Attributes
5B8,X
5C8,X: Bullet Angle (0 = due right) (C = due left)
5D8,X
5E8,X: Enemy Bullet Counter (among other things)

6xx: Sprite Data

680: Tile Collision Data

7C0,X: Palettes

7E0: High Score (low byte)
7E1: High Score (high byte)
7E2: Player 1 Score (low byte)
7E3: Player 1 Score (high byte)
7E4: Player 2 Score (low byte)
7E5: Player 2 Score (high byte)

7EC: Bank to return to

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