NOTE: All values in Tables are Hexadecimal unless noted otherwise.

The following article is a RAM map for The Legend of Zelda: Oracle of Seasons.

Bank 0 (C000 - CFFF)

TBD

RAM	Size	Purpose	Note
C5C0 - C5FF		Unappraised rings carried
C602 - C606	5 Bytes	Player name
C616 - C61D	8 Bytes	Rings owned
C61E - C61F	2 Bytes	Deaths
C622 - C625	4 Bytes	Time passed since power-on
C627 - C628	2 Bytes	Rupees earned since file creation	Value is represented in decimal. Example: If the total earned rupee count is 8,473, the hexadecimal representation will be `0x8473`. When a rupee gain pushes the value over `0x9999`, the value is then set to 0x6363, the value will no longer change, and `C6CA` is then incremented by `0x01` so that Vasu will give the Rupee Ring the next time he is spoken with.
C629	1 Byte	Message Speed	`0x00 - 0x04` Some higher values yield hilarious results such as a letter appearing once per few seconds.
C63A	1 Byte	Current level bank
C63B	1 Byte	Current Absolute Overworld Screen OR Current Relative Dungeon Screen	On the overworld, all 256 map tiles are represented in order; left to right, top to bottom, `0x00 - 0xFF`. Inside a dungeon, only map tiles that are valid rooms are represented while empty map tiles are not counted; the only empty map tiles that are counted are the ones leading up to the first valid room in order, then from there, the value only increases with each valid room.
C63C	1 Byte	Current Absolute Dungeon Screen	Unlike with `C63B`, all tiles on the dungeon map, including ones that do not represent a valid room, are counted in order; left to right, top to bottom, `0x00 - 0xFF`.

RAM	Size	Purpose
C63E	1 Byte	Last Maple encounter
C64C	1 Byte	Gasha Seed planted at ??
C64D	1 Byte	Gasha Seed planted at ??
C64E	1 Byte	Gasha Seed planted at ??
C64F	1 Byte	Gasha Seed planted at ??
C650	1 Byte	Gasha Seed planted at ??
C651	1 Byte	Gasha Seed planted at ??
C652	1 Byte	Gasha Seed planted at ??
C653	1 Byte	Gasha Seed planted at ??
C654	1 Byte	Gasha Seed planted at ??
C655	1 Byte	Gasha Seed planted at ??
C656	1 Byte	Gasha Seed planted at K7
C657	1 Byte	Gasha Seed planted at ??
C658	1 Byte	Gasha Seed planted at ??
C659	1 Byte	Gasha Seed planted at ??
C65A	1 Byte	Gasha Seed planted at ??
C65B	1 Byte	Gasha Seed planted at M9

**C65C - C65D**
Action	Incrementation	Note
Great Fairy Heal	`0x40`
Bomb a Wall	`0x32`
Collect a Fairy	`0x18`
Screen Transition	`0x05`	This excludes entering/exiting structures, or taking mini-boss warps in dungeons. (TODO: Test Gale seeds)
Collect a Heart	`0x04`
Slay an Enemy	`0x03`

RAM	Size	Purpose	Note
C662	1 Byte	Has entered Hero's Cave
C663	1 Byte	Has entered Level 1: Gnarled Root Dungeon	Exiting a sublevel or using a mini-boss warp will also set this flag (though redundant).
C664	1 Byte	Has entered Level 2: Snake's Remains (?)
C665	1 Byte	Has entered Level 3: Poison Moth's Lair (?)
C666	1 Byte	Has entered Moblin's Keep (?)
C667	1 Byte	Has entered Level 4: Dancing Dragon Dungeon (?)
C668	1 Byte	Has entered Level 5: Unicorn's Cave (?)
C669	1 Byte	Has entered Level 6: Ancient Ruins (?)
C66A	1 Byte	Has entered Level 7: Explorer's Crypt (?)
C66B	1 Byte	Has entered Level 8: Sword & Shield Maze (?)
C66C	1 Byte	Has entered Onox's Castle (?)

C66E	1 Byte	Small Keys — Hero's Cave
C66F	1 Byte	Small Keys — Level 1: Gnarled Root Dungeon
C670	1 Byte	Small Keys — Level 2: Snake's Remains (?)
C671	1 Byte	Small Keys — Level 3: Poison Moth's Lair (?)
C672	1 Byte	Small Keys — Moblin's Keep (?)
C673	1 Byte	Small Keys — Level 4: Dancing Dragon Dungeon (?)
C674	1 Byte	Small Keys — Level 5: Unicorn's Cave (?)
C675	1 Byte	Small Keys — Level 6: Ancient Ruins (?)
C676	1 Byte	Small Keys — Level 7: Explorer's Crypt (?)
C677	1 Byte	Small Keys — Level 8: Sword & Shield Maze (?)
C678	1 Byte	Small Keys — Onox's Castle (?)

C67A	1 Byte	Has Boss Key	True if value ends in 2, 3, 6, 7, A, B, E, or F (TODO: Determine why multiple values evaluate to True)
C67C	1 Byte	Has Compass	True if value ends in 2, 3, 6, 7, A, B, E, or F (TODO: Determine why multiple values evaluate to True)
C67E	1 Byte	Has Dungeon Map	True if value ends in 2, 3, 6, 7, A, B, E, or F (TODO: Determine why multiple values evaluate to True)

RAM	Size	Purpose	Note
C680 - C691		Items
C6A2	1 Byte	Current Hearts
C6A3	1 Byte	Max Hearts
C6A5 - C6A6	2 Bytes	Rupees	Value is represented in decimal. Example: If the total rupee count is 639, the hexadecimal representation will be `0x0639`.
C6A7 - C6A8	2 Bytes	Ore Chunks
C6A9	1 Byte	Shield level
C6AA	1 Byte	Current Bombs
C6AC	1 Byte	Sword level
C6B1	1 Byte	Boomerang level
C6B3	1 Byte	Slingshot level
C6B4	1 Byte	Roc's feather level
C6B5	1 Byte	Ember Seeds
C6B6	1 Byte	Scent Seeds
C6B7	1 Byte	Pegasus Seeds
C6B8	1 Byte	Gale Seeds
C6B9	1 Byte	Mystery Seeds
C6BA	1 Byte	Gasha Seeds
C6BB	1 Byte	Essences
C6CA	1 Byte	Vasu Ring Flags	`0x01`: Slayed 1,000 Monsters — Slayer's Ring `0x02`: Collected 10,000 Rupees — Rupee Ring `0x04`: Saved the World — Victory Ring Based on what events have occurred, the above values get added to this address. Collecting each corresponding ring then adds the corresponding value multiplied by 0x10 to this address. Example: If the value is `0x03`, the player has collected 10,000 rupees and slayed 1,000 Monsters `[0x02 + 0x01]`. After the Rupee Ring is received, the value is then `0x23` `[0x03 + (0x03 * 0x10)]`, and then when the Slayers Ring is received, the value is `0x33` `[0x23 + (0x01 * 0x10)]`.
C6C6	1 Byte	Ring Box level

RAM	Size	Purpose	Note
C700 - C7FF	256 Bytes	Overworld Screen Flags (used to track events and map exploration)
CC30	1 Byte	Enemies left on screen
CE00 - CEAF		Current Screen Collision Data	Dynamically generated from the screen tile data. This space is also used as a temporary store for compressed level data read from ROM.
CF00 - CFAF		Current Screen Tile Data