Memory Map

Address(es)	Description	Details
0018	Game State	0x00 - Black screen 0x01 - Start screen 0x04 - immediately follows state 0x0F when game is starting 0x05 - main gameplay state, immediately follows state 0x04 0x06 - after death, returns to 0x05 0x07 - continue screen 0x08 - game start/password screen, also password entry screen 0x0A - game ending screens 0x0E - after ending screen, just before transitioning back to start screen, followed by 0x00, then 0x01 0x0F - pressed start on game start screen
001C	Currently loaded memory bank
0022	Length of PPU instruction(s) to execute from the $700-$7FF range
0026	Gameplay State	0x00 - Game Active 0x01 - Inventory (start) 0x02 - Pause (select)
0030	objset, which determines which section of the map loads, as well as which pattern table loads for the enemies and NPCs	0x00 - Town 0x01 - Mansion 0x02 - Woods 1 0x03 - Woods 2 0x04 - Graveyard 0x05 - Castlevania
0031	Lives
0033	Index of selected inventory section	0x00 - Quest items (Dracula parts and crystal) 0x01 - Weapons, laurels, and garlic
003D	Map Value 1
003E	Map Value 2
0037	D-Pad Pushing	0x00 - Idle 0x01 - Left 0xFF - Right
0046	Experience: 99XX
0047	Experience: XX99
0048	Hearts: 99XX
0049	Hearts: XX99
004A	Weapon Bit Flag	0x01 - Dagger 0x02 - Silver Dagger 0x04 - Golden Knife 0x08 - Holy Water 0x10 - Crystal 0x20 - Sacred Flame 0x40 - Oak Stake
004C	Laurels
004D	Garlic
004E	Area prior to entering a door	saves value at $50
004F	Index of quest item selected in inventory	01 - Rib 02 - Heart 03 - Eyeball 04 - Nail 05 - Ring 06 - Crystal
0053	Simon x position relative to map (low byte)
0054	Simon x position relative to map (high byte)
0056	Simon y position relative to map (low byte)
0057	Simon y position relative to map (high byte)
0058	Map X Chunk
0059	Map X Position
005E	Temp variable for low byte of nametable position
005F	Temp variable for high byte of nametable position
006A	Simon Y Position
006D	Simon X Delta
0077	Dialog writing text row
0078	Dialog writing text column
007B	Dialog text timeout until next letter.
007C	Dialog text memory offset
007D	Dialog starting column	Also the dialog timeout to automatically disappear Also the option highlighted for Yes/No questions.
007F	Actor identifier, used in conjunction with objset, area, and submap to get unique id Offset for dialog text pointer	07:EEA4:A5 7F LDA $007F = #$38 07:EEA6:0A ASL 07:EEA7:AA TAX 07:EEA8:BD 82 8B LDA $8B82,X @ $8BF2 = #$BF 07:EEAB:85 00 STA $0000 = #$BF 07:EEAD:BD 83 8B LDA $8B83,X @ $8BF3 = #$92 07:EEB0:85 01 STA $0001 = #$92 where $92BF points to dialog text in memory
0080	Current Hit Points
0081	Maximum Hit Points
0082	Sun flag (0=Day, 1=Night)	MAY NOT BE ACCURATE
0083	Game Time (Days)
0084	Game Time (Seconds)
0085	Game Time (Minutes)
0086	Game Time (Hours) (6-17 Day time, 18-5 Night time)
0087	Counter for day/night palette shift.
0088	Counter for day/night palette shift.
008B	Level
0090	Index of selected weapon in inventory	01 - Dagger 02 - Silver Knife 03 - Golden Knife 04 - Holy Water 05 - Diamond 06 - Sacred Flame 07 - Oak Stake 08 - Laurels 09 - Garlic
0091	Inventory Bit Flag	01 - Rib 02 - Heart 03 - Eye 04 - Nail 05 - Ring 06 - White Crystal 07 - Blue Crystal 6+7 - Red Crystal
0092	Carry Items Bit Flag	01 - Silk Bag 02 - Magic Cross 03 - Laurels 04 - Garlic
00AE	Pulse sound effect enable (0 or 1)
00AF	Noise sound effect enable (0 or 1)
00B4	Pulse sound effect id
00B5	Noise sound effect id
00BA	Pulse sound effect pointer (low byte)
00BB	Noise sound effect pointer (low byte)
00C0	Pulse sound effect pointer (high byte)
00C1	Noise sound effect pointer (high byte)
00C6	Pulse sound effect enable (0 or 1)
00C7	Noise sound effect enable (0 or 1)
00F1	Gamepad input mask	00 - no input 01 - right 02 - left 04 - down 08 - up 10 - start button 20 - select button 40 - B button 80 - A button
00FC	PPU_SCROLL (y-axis)
00FD	PPU_SCROLL (x-axis)
00FE	PPU_MASK
00FF	PPU_CONTROL
0110-0150	Music
0197	Laurels effect countdown (laurels active if value greater than 0)
0200-02FF	OAM RAM	PPU OAM explanation on nesdev.com
0300	Simon Sprite Frame
0303-0305	Weapon Frame
0306-030B	Object Frame
0318-031D	Object Palette
0324	Simon Y Pos on Screen
0327-0329	Weapon Y
032A-032F	Object Y
0336	Simon Jumping Work (Y subpixel for floor drops)
0339-033B	Weapon Work 1?
033C	Object Work ?
0348	Simon X Pos on Screen
034B-034D	Weapon X
034E-0353	Object X
0360	Object Work?
036C	Simon Y Delta
036F-0371	Weapon Y Delta (Signed)
0372-0377	Object Y Delta (Signed)
037E	Object Work ?
0381-0383	Weapon Work 2?
0384	Object Work?
0393-0395	Weapon X Delta (Signed)
0396-039B	Object X Delta (Signed)
03B5	When not zero, trigger simon whipping animation
03B7-03B9	Weapon Index (See List)
03BA-03BF	Object Index (See List)
03D8	Simon Action	00 - Idle 01 - Walking 02 - Jumping 03 - Crouching 04 - Attacking 05 - Floor Drop (Walking + Attacking bits) 06 - Damage Boosting 09 - On Stairs (Standing Still) 0A - On Stairs (2nd frame of moving animation) 80 - Dead (First frame) 81 - Dead (Flying into air) 82 - Dead (Lying on ground)
03DB-03DD	Weapon Flags
0402-0407	Object Frame
040E	Movement flag? (00
0420	Simon Sprite Mirroring
0423-0425	Weapon Sprite Mirroring
0426-042B	Object Sprite Mirroring
0434	Whip	00 - Leather Whip 01 - Thorn Whip 02 - Chain Whip 03 - Morning Star 04 - Flame Whip
0445	Whip State	00 - Idle 01 - Back 02 - Middle 03 - Forward
0446	Jumping Flag
0447-0449	Weapon Flags
044A	Object Work?
0457	Delay between next whip.
0458	Simon x position relative to map prior to entering a door (low byte)	saves the value at $53
045C	Object Work?
046A	Simon x position relative to map prior to entering a door (high byte)	saves the value at $54
046E	Object Work?
047A	Post-ending screen transition state	0x01 - ending text on screen 0x02 - Simon and text disappear 0x03 - Dracula's grave begins to rumble 0x04 - Dracula's hand starts rising from grave 0x07 - Dracula's hand rests on top of grave
047C	Simon y position relative to map prior to entering a door (low byte) Countdown until next screen transition after final ending text (leading to Dracula rising)	When used for y position, it saves the value at $56
047D	Y position of current ending text character
047F	X position of current ending text character
0480	Countdown until next character on ending screen	??? between each character 0x35 between each line of text
0482	Countdown until next ending screen	0x40 frames between screens
048E	Simon y position relative to map prior to entering a door (high byte)	saves the value at $57
04A0	Simon x position on screen prior to entering a door	saves the value at $348
04B2	Simon y position on screen prior to entering a door	saves the value at $324
04C2	Set at 1 when up is pressed, set to 0 when down is pressed.
04C5-04C7	Weapon State
04C8-04CD	Object Hit Points / OR
04DA	Object Work?
04F8	Invulnerable Timeout
0700-07FF	PPU Instructions (See PPU Instruction format)
C185	Address of subroutine responsible for bank switching	Set value $1C to the number of the bank then execute a JSR at the given address. If you want to set $1C based on the accumulator, subtract 2 from the RAM address, which will in turn set $1C to the value of the accumulator.
8BE2	Whip damage (leather)	0x01
8BE3	Whip damage (thorn)	0x02
8BE4	Whip damage (chain)	0x04
8BE5	Whip damage (morning star)	0x08
8BE6	Whip damage (flame)	0x0F