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Mega Man 4/RAM map
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Joypad Memory
| RAM | Function | Details |
| $14 | Joypad 1 - Button Push Bits | Bits possible values : [0 = Not Recently Pushed Down, 1 = Recently Pushed Down] |
| $15 | Joypad 2 - Button Push Bits | Bits possible values : [0 = Not Recently Pushed Down, 1 = Recently Pushed Down] |
| $16 | Joypad 1 - Button Status Bits | Bits possible values : [0 = Not Being Pressed Down, 1 = Being Pressed Down] |
| $17 | Joypad 2 - Button Status Bits | Bits possible values : [0 = Not Being Pressed Down, 1 = Being Pressed Down] |
- LSB to MSB
Bit Function Bit Function 0 Right 4 Start 1 Left 5 Select 2 Down 6 B 3 Up 7 A
HP / Energy
| RAM | Function |
| $B0 | Megaman's HP |
Weapon Energy - Array
| RAM | Function |
| $B1 | Rush Coil |
| $B2 | Rush Jet |
| $B3 | Rush Marine |
| $B4 | Toad - Rain Flush |
| $B5 | Wire Adaptor |
| $B6 | Balloon Adaptor |
| $B7 | Dive - Dive Missile |
| $B8 | Ring - Ring Boomerang |
| $B9 | Drill - Drill Bomb |
| $BA | Dust - Dust Crusher |
| $BB | Pharaoh - Pharaoh Shot |
| $BC | Bright - Flash Stopper |
| $BD | Skull - Skull Barrier |
| $BE | Used for Weapon's menu drawing |
| RAM | Function |
| $BF | Boss HP Amount for drawing |
Sprite/Object Arrays
| RAM | Function | Details |
| 300-317 | Object ID | |
| 318-32F | X Coordinate Ratio Counter | |
| 330-347 | X Coordinate | |
| 348-35F | X Screen (Level Screen) | |
| 360-377 | Y Coordinate Ratio Counter | |
| 378-38F | Y Coordinate | |
| 390-3A7 | Y Screen | |
| 3A8-3BF | Horizontal Speed Low | |
| 3C0-3D7 | Horizontal Speed High | |
| 3D8-3EF | Vertical Speed Low | |
| 3F0-407 | Vertical Speed High | |
| 408-41F | Substance and Shape | |
| 420-437 | Direction Bits | |
| 438-44F | Enemy Number# in Level | Useful to FC9E / 7FCAE |
| 450-467 | Enemy HP | |
| 468-47F | Object ASM Private Memory 1 | |
| 480-497 | Object ASM Private Memory 2 | |
| 498-4AF | Object ASM Private Memory 3 | |
| 4B0-4C7 | Object ASM Private Memory 4 | |
| 4C8-4DF | Object ASM Private Memory 5 | |
| 4E0-4F7 | Object ASM Private Memory 6 | |
| 4F8-50F | Object ASM Private Memory 7 | |
| 510-527 | Object ASM Private Memory 8 | |
| 528-53F | Sprite Flags | |
| 540-557 | Sprite's Animation | |
| 558-56F | Sprite ID | |
| 570-587 | Animation Frame Counter | |
| 588-59F | ASM - Low Address | |
| 5A0-5B7 | ASM - High Address | |
| 5B8-5CF | Invincibility Blink / Freeze Action Status | |
| 5D0-5FF | Never used in entire game |
Credits
Matrixz
MartsINY
Internal Data for Mega Man IV
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