Final Fantasy III (NES)/RAM map

The following article is a RAM map for Final Fantasy III (NES).

SRAM

Note:  Also used as work RAM.

File Structure (0x2000 = 8192 bytes, starts at CPU 0x6000 when mapped)

	Offset | Len  | Description
	_______|______|____________
	0x0000 | 1024 | Last Save
	0x0400 | 1024 | Slot #1
	0x0800 | 1024 | Slot #2
	0x0C00 | 1024 | Slot #3

Save Slot Structure (0x400 = 1024 bytes)

	Offset | Len | Description
	_______|_____|______________________
	0x0000 |   1 | Any Airship Visible
	0x0001 |   1 | Airship X
	0x0002 |   1 | Airship Y
	0x0004 |   1 | Big Airship Visible
	0x0005 |   1 | Big Airship X
	0x0006 |   1 | Big Airship Y
	0x0008 |   1 | Map ID
	0x0009 |   1 | Player X
	0x000A |   1 | Player Y
	0x000B |   1 | Following
	0x000E |   1 | Player Icon
	0x000F |   1 | Player Vehicle
	0x0014 |   1 | Save Count
	0x001A |   1 | Checksum
	0x001B |   1 | CP (Change Points)
	0x001C |   3 | Gold
	0x0021 |   1 | Crystal Level (Max: 0x1F)
	0x00C0 |  32 | Inventory IDs
	0x00E0 |  32 | Inventory Count
	0x0100 | 256 | Characters A x 4
	0x0200 | 256 | Characters B x 4

Character Structure A (0x40 = 64 bytes)

	Offset | Len | Description
	_______|_____|_____________________
	0x0000 |   1 | Job ID
	0x0001 |   1 | Level (Starts at 0)
	0x0002 |   1 | Status
	0x0003 |   3 | Experience
	0x0006 |   6 | Name
	0x000C |   2 | Current HP
	0x000E |   2 | Maximum HP
	0x0010 |   1 | Current Job Level
	0x0011 |   1 | Current Job Experience
	0x0012 |   5 | Stats w/o Equip
	0x0017 |   5 | Stats with Equip
	0x001C |   1 | ?? (Always 00)
	0x001D |   1 | ?? (Goes from 00 to 04 from beginning to end of game)
	0x001E |   1 | Magic Evade %
	0x001F |   1 | Magic Defense
	0x0020 |   1 | ?? (Barely changes from beginning to end of game)
	0x0021 |   1 | Attack Roll
	0x0022 |   1 | Hit %
	0x0023 |   1 | Attack Power (added to weapon type and job class modifiers)
	0x0024 |   1 | ?? (Always 00)
	0x0025 |   1 | ?? (Known values:  10,24,20,40 from beginning to end of game)
	0x0026 |   1 | Bonus Attack Roll
	0x0027 |   1 | Hit % Modifier
	0x0028 |   1 | Bonus Attack Power
	0x0029 |   1 | ?? (Known values:  00,05)
	0x002A |   1 | ?? (Known values:  00,04,18)
	0x002B |   1 | Guard Roll
	0x002C |   1 | Evade %
	0x002D |   1 | Guard Power
	0x002F |   1 | ?? (Always 00, un/equiping armor resets it back to 00)
	0x0030 |   1 | MP Level 1 (Current)
	0x0031 |   1 | MP Level 1 (Max)
	0x0032 |  14 | MP Levels 2-8 (Same pattern as 6130-6131)


Character Structure B (0x40 = 64 bytes)

	Offset | Len | Description
	_______|_____|_____________________
	0x0000 |   1 | Equip: Head
	0x0001 |   1 | Equip: Body
	0x0002 |   1 | Equip: Arms
	0x0003 |   1 | Equip: Right Type
	0x0004 |   1 | Equip: Right Quantity (Used for arrows)
	0x0005 |   1 | Equip: Left Type
	0x0006 |   1 | Equip: Left Quantity
	0x0007 |   8 | Equip: Magic levels 1-8
	0x000F |   1 | Row (2: Front, 3: Back)
	0x0010 |  44 | Job Level, Experience x 22 (Same order as in game;  On,Fi,Mo,Wh,Bl,Rd,Hu,etc.)
	0x003C |   4 | ?? (Always 00, doesn't seem to overwrite?)

Zero Page

Zero Page Variables

	Offset | Len | Description
	_______|_____|_____________________
	0027   |   1 | Horizontal position (Overworld)
	0029   |   1 | Horizontal position (Non-overworld) in area
	002A   |   1 | Vertical position (Non-overworld) in area (needs more details/incomplete)
	002B   |   1 | Horizontal position (Overworld) that tile engine sees?
	0031   |   1 | Horizontal position (Overworld) that tile engine sees?
	0033   |  4b | Direction character walks/faces (Non-overworld) 01=Right 02=Left 04=Down 08=Up
	0042   |   1 | Vehichle(Overworld): 00 = On Foot; 03 = Boat
        0068   |   1 | Horizontal position that NPCs think you're at (They can walk through you if you change this)
	00F5   |   1 | Encounter Counter (Goes up when doing stuff like using potions or moving on screen)

PPU

CHR-RAM

	Offset    | Len  | Description
	__________|______|_____________________
	0000-07FF | 2000 | Bank pair (2KB)
	0800-0FFF | 2000 | Bank pair (2KB)
	1000-13FF | 2000 | Bank (1KB)
	1400-17FF | 2000 | Bank (1KB)
	1800-1BFF | 2000 | Bank (1KB)
	1C00-1FFF | 2000 | Bank (1KB)

See also for CPU 8000-FFFF: Final_Fantasy_III:ROM_map