Mega Man (NES)/RAM map

The following article is a RAM map for Mega Man (NES).

Note: Memory locations discovered using the 'FCEU' Emulator for Windows.

Given values: $Hexadecimal value(Decimal value), ex. $63(99)

Any values less than $0A(10) will only show the Hex value.

RAM	Function	Details
0x0014	Controller 1 buttons held
0x0015	Controller 2 buttons held
0x0016	Controller 1 buttons held	clone of 0x0014?
0x0017	Controller 2 buttons held	clone of 0x0015?
0x0018	Controller 1 buttons tapped
0x0019	Controller 2 buttons tapped
0x001A	Camera X position
0x001B	Camera X screen	when 0x001A gets larger than $FF(255), this value increases by $01
0x001C	Camera state	$00 Default $01 Changing the nametable (Ex.: scrolling within an area, creating the pause menu, blinking palette in the stage select screen,…) $02 Freeze before and after scrolling to a new area $40 Scrolling to a new area
0x001E	Camera Y position
0x0020	Mega Man's X screen	when 0x0022 gets larger than $FF(255), this value increases by $01
0x0021-22	Mega Man's X position	0x0021 is sub-pixel, 0x0022 is pixel
0x0023	Timer	increases by $01/frame. If we pause the game, it continues while in the menu, but when the game is unpaused, it reverts back to what value it had before pausing.
0x0024-25	Mega Man's Y position	0x0024 is sub-pixel, 0x0025 is pixel
0x002C	Type of object that Mega Man is touching from the top	$00-Air, $01-Solid, $02-Ladder, $03-Spike, $04-Ice, $05-Water
0x0031	Stage ID	$00-Cut Man, $01-Ice Man, $02-Bomb Man, $03-Fire Man, $04-Elec Man, $05-Guts Man, $06-Wily 1, $07-Wily 2, $08-Wily 3, $09-Wily 4, $0A(10)-Title Screen, $0B(11)-Ending BG
0x0055	Mega Man's I-frame Counter	Starts counting down from $6F(111) $01/frame each time Mega Man gets hurt. When it gets to zero, Mega Man stops being invincible. Notes: Mega Man's "is hurt" animation lasts from $6E(110) to $50(80).
0x005D	Which enemies have been defeated/Weapons unlocked bit 1 Bomb Man/Hyper Bomb bit 2 Elec Man/Thunder Beam bit 3 Guts Man/Super Arm bit 4 Ice Man/Ice Slasher bit 5 Cut Man/Rolling Cutter bit 6 Fire Man/Fire Storm bit 7 Magnet Beam	Setting a bit will defeat/unlock the corresponding villain/weapon. Set this byte to $FE(254) to go directly to Dr. Wily.
0x005F	Weapon Select (Works only when pausing, otherwise values will be different.) $00 Mega Buster(normal weapon) $01 Hyper Bomb $02 Thunder Beam $03 Super Arm $04 Ice Slasher $05 Rolling Cutter $06 Fire Storm $07 Magnet Beam	This only controls the weapon function, it will not change his color. You can select any weapon even if it's still locked.
0x0060	Are Mega Man's bullets on-screen	$C0(192)-are on-screen, $00-aren't on screen Probably a boolean to see if some bullet collision-detection routine is executed or not.
0x006A	Mega Man Life Bar Value	$1C(28)-Full, $00-Empty
0x006B	Cut Man Weapon Energy	$1C(28)-Full, $00-Empty
0x006C	Ice Man Weapon Energy	$1C(28)-Full, $00-Empty
0x006D	Bomb Man Weapon Energy	$1C(28)-Full, $00-Empty
0x006E	Fire Man Weapon Energy	$1C(28)-Full, $00-Empty
0x006F	Elec Man Weapon Energy	$1C(28)-Full, $00-Empty
0x0070	Guts Man Weapon Energy	$1C(28)-Full, $00-Empty
0x0071	Magnet Beam Weapon Energy	$1C(28)-Full, $00-Empty
0x0072-78	Score	Each byte represents one digit in BCD. Starts with ones digit (0x0072)
0x0094	Type of object that Mega Man is touching from the sides	$00-Air, $01-Solid, $02-Ladder, $03-Spike, $04-Ice, $05-Water
0x00A6	Lives	Maximum is $80(128). Bit 7 set gives Game Over. Game will not raise it past $63(99).
0x00AE	Bonus	Number of bonus energy balls picked up during level. Is multiplied by 1000 at level completion screen.
0x0100-FF	Stack	RAM used by CPU for stack.
0x0200-FF	Sprite Data	256 byte block that is transferred via DMA to PPU memory during each NMI Routine.
0x03D0-DF	Palette Data	The whole BG palette. $10(16) bytes long.
0x0440	Mega Man's Blink Timer	Counts upwards $01/frame in pseudo base 9 ($07, $08, $10…) to $A8. Mega Man closes his eyes beginning at $A2 and lasting 9 frames.
0x0500-7F	Sound Values	Each channel is attributed $20(32) addresses. Pulse 1, Pulse 2, Triangle and Noise, in that order. $00 Note ID $01 Music Pattern? $02-03 Countdown for when note ends (in frame quarters) $06 Vibrato Speed $0a Note Pitch ID $0e Current number of frames after note started $14 Vibrato bend direction $1d Current number of frames after note or silence started
0x06C1	Boss Energy	$1C(28)-Full, $00-Empty