Teenage Mutant Ninja Turtles (NES)/RAM map

The following article is a RAM map for Teenage Mutant Ninja Turtles (NES).

RAM Address	Description
$0000 - $0017	Temp/Scratch memory
$0019	Temp X Register Backup
$001a	Temp Y Register Backup
$001b	Current Game State ID
$001c	Substate ID of Current Game State
$001e	Global Timer
$001f	NMI Ignore Flag
$0020	Disable Rendering Timer
$0021	Current PRG Bank
$0027	Current CHR Bank 0
$0028	Current CHR Bank 1
$0029 - $002a	HUD PPU Position (stored as big endian value)
$002c	Current Primary BG Color
$0030 - $0031	Current Buttons being Pressed
$0032 - $0033	Current Buttons being Held
$0035	Game is Paused Flag
$0036	Pausing is Disabled Flag
$0045	Random Number (used for things based on randomization)
$0046	Continues (You start with 3)
$0048	World Number
$0055	Technodrome Location Subarea ID (Can be 2, 3, or 4)
$0056	Has Rescued Captured Turtle in Level Flag
$0057	Captured Turtle ID
$0059	PRG Bank before Sound Engine Update
$005b	Whether the special weapon is selected or not
$005c	Is Inside Subarea Flag (0 if overworld, 1 if subarea)
$005d	Current side-scrolling area (0 in overhead areas)
$005e	Is Mandatory Fight Flag (0 = false, 1 = fight queued, 2 = miniboss, 3 = boss)
$0067	Current Turtle Selected (0:Leo, 1:Raph, 2:Mike, 3:Don)
$006e	Item(s) in Subarea Collect (bitwise and depends on subarea)
$0073	Leo's Special Weapon (0:Nothing, 1:Stars, 2:Triple Stars, 3:Boomerangs, 4:Scrolls)
$0074	Raph's Special Weapon
$0075	Mike's Special Weapon
$0076	Don's Special Weapon
$0077	Leo's Energy ($00 - $80)
$0078	Raph's Energy
$0079	Mike's Energy
$007a	Don's Energy
$007d	Disarmed Bombs (bitwise)
$0080 - $0081	Destroyed Barricades (bitwise)
$00a0	Last Turtle Selected Upon Pause (Set when pause screen starts. Mainly used for writing which turtle has been caught)
$00a7	Amount of Ropes ($00 - $63)
$00a8	Leo's Special Weapon Quantity ($00 - $63)
$00a9	Raph's Special Weapon Quantity
$00aa	Mike's Special Weapon Quantity
$00ab	Don's Special Weapon Quantity
$00b5	Miscellaneous Game Scene ID (Can be $01-$10)
$00ba - $00bb	Dam Timer (first byte is countdown, second is for displaying the timer)
$00bf	Turtle Van Missiles
$00c0	Score 99xxxx0
$00c1	Score xx99xx0
$00c2	Score xxxx990
$00c3	Unknown Score 99xxxx0
$00c4	Unknown Score xx99xx0
$00c5	Unknown Score xxxx990
$00c6	High Score 99xxxx0
$00c7	High Score xx99xx0
$00c8	High Score xxxx990
$00d0	Pause Screen State ID
$00d4	Is Attacking While Ducking Flag
$00f0	Skip Music Engine Update Flag
$00fc	PPU Scroll X
$00fd	PPU Scroll Y
$00fe	PPU Mask
$00ff	PPU Control
$0200	Sprite Memory
$0460	Turtle Y Position
$0480	Turtle X Position
$04B0	Turtle Y Velocity
$04E0	Turtle X Velocity
$0500	Invincibility Timeout
$056X	Enemy Hit Points
$0630	Invincibility Timeout
$0631	Timer for items disappearing