User:Cassidymoen!2979/SRAM Map: Difference between revisions

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== SRAM Map ==
== SRAM Map ==


=== '''$000''' to '''$24F''' - Room Data ===
=== '''Room Data''': {{MemoryAddress/PC|000}} to {{MemoryAddress/PC|24F}} ===


There are 296 ('''$128''') rooms in in the ROM. Each room's data occupies one word, or two bytes.
There are 296 ({{MemoryValue/Generic|128}}) rooms in in the ROM. Each room's data occupies one word, or two bytes.


{| class="wikitable"
{| class="wikitable"
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The quadrant bits corresponds to quadrants <code>4</code>, <code>3</code>, <code>2</code>, and <code>1</code> in that order which is also how the quadrants are laid out on a tile from left to right (upper left, upper right, lower left, lower right), so if quadrants <code>4</code> and <code>1</code> have been "seen" by Link, then <code>qqqq</code> will look like <code>1001</code>.
The quadrant bits corresponds to quadrants <code>4</code>, <code>3</code>, <code>2</code>, and <code>1</code> in that order which is also how the quadrants are laid out on a tile from left to right (upper left, upper right, lower left, lower right), so if quadrants <code>4</code> and <code>1</code> have been "seen" by Link, then <code>qqqq</code> will look like <code>1001</code>.


=== '''$250''' to '''$27F''' - Unused ===  
=== '''Unused''': {{MemoryAddress/PC|250}} to {{MemoryAddress/PC|27F}} ===


=== '''$280''' to '''$2FF''' - Overworld Event Information ===
* Presumed unused in both vanilla and randomizer.
 
=== '''Overworld Event Information''': {{MemoryAddress/PC|280}} to {{MemoryAddress/PC|2FF}} ===


Each area occupies one byte.
Each area occupies one byte.
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<code>? h o ? ? ? s ?</code>
<code>? h o ? ? ? s ?</code>


* <code>o</code> - If set, the area will draw its designated overlay when you enter it. e.g. If you're triggered misery mire then the entrance shows up there the next time you enter that area. You can view overlays in the latest release of Hyrule Magic (v0.963). Other overlays include stairs leading underground, and the removal of the weather vane after it has exploded.
* <code>o</code> - If set, the area will draw its designated overlay when you enter it. e.g. If you're triggered misery mire then the entrance shows up there the next time you enter that area. You can view overlays in the latest release of Hyrule Magic. Other overlays include stairs leading underground, and the removal of the weather vane after it has exploded.
* <code>s</code> - If set, the area will draw its secondary overlay when you enter it.
* <code>s</code> - If set, the area will draw its secondary overlay when you enter it.
* <code>h</code> - If set, heart piece has been collected in this area already. Also used for a handful of other sprites.
* <code>h</code> - If set, heart piece has been collected in this area already. Also used for a handful of other sprites.
* <code>?</code> - Unknown, possibly unused.
* <code>?</code> - Unknown, possibly unused.


=== '''$300''' to '''$33F''' - Shop Purchase Counts ===
=== '''Shop Purchase Counts''': {{MemoryAddress/PC|300}} to {{MemoryAddress/PC|33F}} ===


The randomizer ROM uses new shop code to handle loading and configuration of shops which allows the higher-level item and entrance randomizers to use clean, convenient abstractions for changing them. Through these abstractions, the randomizer can dictate a certain number of times that a shop item can be re-purchased (e.g. you can only buy capacity upgrades seven times.) The bytes here (except for '''$300''' which is currently unknown) are used to count how many times a single item in a shop has been purchased. They are dynamically assigned at generation time, which is to say that any single byte should not be considered statically bound to a certain item in a shop. Take-Any caves as well as the old man with the sword in Retro world state are considered shops in this context.
The randomizer ROM uses new shop code to handle loading and configuration of shops which allows the higher-level item and entrance randomizers to use clean, convenient abstractions for changing them. The higher-level randomizers can dictate a certain number of times that a shop item can be re-purchased (e.g. you can only buy capacity upgrades seven times.) The bytes here (except for '''$300''' which is currently unknown) are used to count how many times a single item in a shop has been purchased. They are dynamically assigned at generation time, which is to say that any single byte should not be considered statically bound to a certain item in a shop. Take-Any caves as well as the old man with the sword in Retro world state are considered shops in this context.


'''Note 1:''' This is noted as a "temporary home" for the shop purchase counts in the base rom's source code
'''Note 1:''' This is noted as a "temporary home" for the shop purchase counts in the base rom's source code


'''Note 2:''' Jumping into deep water without flippers and being placed back on land on the Hobo and Zora's Domain maps are known to overwrite '''$302''' and '''$304''' respectively. This has no effect if a shop item can always be repurchased, but will lead to unintended behavior if the item can only be purchased a limited amount of times.
'''Note 2:''' Jumping into deep water without flippers and being placed back on land on the Hobo and Zora's Domain maps are known to overwrite {{MemoryAddress/PC|302}} and {{MemoryAddress/PC|304}} respectively. This has no effect if a shop item can always be repurchased, but will lead to unintended behavior if the item can only be purchased a limited amount of times.


=== '''$340''' to '''$38B''' - Items & Equipment ===
=== '''Items & Equipment''': {{MemoryAddress/PC|340}} to {{MemoryAddress/PC|38B}} ===


{| border="1" align="center" cellpadding="4" cellspacing="0" style="margin: 0 0 1em 1em; background: #f7f8ff; border: 1px #8888cc solid; border-collapse: collapse; font-size: 95%"
{| border="1" align="center" cellpadding="4" cellspacing="0" style="margin: 0 0 1em 1em; background: #f7f8ff; border: 1px #8888cc solid; border-collapse: collapse; font-size: 95%"
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!style="width:15%"|Notes
!style="width:15%"|Notes
|-
|-
|'''$340'''
|{{MemoryAddress/PC|340}}
|[[Bow]]
|[[Bow]]
|{{MemoryValue|00}} - Nothing
|{{MemoryValue|00}} - Nothing
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|-
|-
|-
|-
|'''$341'''
|{{MemoryAddress/PC|341}}
|[[Boomerang]]
|[[Boomerang]]
|{{MemoryValue|00}} - Nothing
|{{MemoryValue|00}} - Nothing
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|{{MemoryValue|02}} - Red
|{{MemoryValue|02}} - Red
|-
|-
|'''$342'''
|{{MemoryAddress/PC|342}}
|[[Hookshot]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Hookshot]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$343'''
|{{MemoryAddress/PC|343}}
|[[Bomb]]s
|[[Bomb]]s
|How many bombs you have
|How many bombs you have
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|Can exceed {{MemoryValue|32}}, up to {{MemoryValue|FF}}.
|Can exceed {{MemoryValue|32}}, up to {{MemoryValue|FF}}.
|-
|-
|'''$344'''
|{{MemoryAddress/PC|344}}
|[[Magic Powder]]
|[[Magic Powder]]
|{{MemoryValue|00}} - Nothing
|{{MemoryValue|00}} - Nothing
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|{{MemoryValue|02}} - [[Magic Powder]]
|{{MemoryValue|02}} - [[Magic Powder]]
|-
|-
|'''$345'''
|{{MemoryAddress/PC|345}}
|[[Fire Rod]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Fire Rod]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$346'''
|{{MemoryAddress/PC|346}}
|[[Ice Rod]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Ice Rod]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$347'''
|{{MemoryAddress/PC|347}}
|[[Bombos Medallion]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Bombos Medallion]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$348'''
|{{MemoryAddress/PC|348}}
|[[Ether Medallion]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Ether Medallion]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$349'''
|{{MemoryAddress/PC|349}}
|[[Quake Medallion]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Quake Medallion]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$34A'''
|{{MemoryAddress/PC|34A}}
|[[Lamp]] ||{{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Lamp]] ||{{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$34B'''
|{{MemoryAddress/PC|34B}}
|[[Magic Hammer]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Magic Hammer]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$34C'''
|{{MemoryAddress/PC|34C}}
|[[Flute]]
|[[Flute]]
|{{MemoryValue|00}} - Nothing
|{{MemoryValue|00}} - Nothing
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|{{MemoryValue|03}} - [[Flute]] & [[Bird]]
|{{MemoryValue|03}} - [[Flute]] & [[Bird]]
|-
|-
|'''$34D'''
|{{MemoryAddress/PC|34D}}
|[[Bug-Catching Net]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Bug-Catching Net]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$34E'''
|{{MemoryAddress/PC|34E}}
|[[Book of Mudora]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Book of Mudora]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$34F'''
|{{MemoryAddress/PC|34F}}
|Bottle Index
|Bottle Index
|{{MemoryValue|00}} - Nothing
|{{MemoryValue|00}} - Nothing
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|{{MemoryValue|04}} - Bottle 4 ({{MemoryAddress/PC|7EF35F}})
|{{MemoryValue|04}} - Bottle 4 ({{MemoryAddress/PC|7EF35F}})
|-
|-
|'''$350'''
|{{MemoryAddress/PC|350}}
|[[Cane of Somaria]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Cane of Somaria]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$351'''
|{{MemoryAddress/PC|351}}
|[[Cane of Byrna]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Cane of Byrna]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$352'''
|{{MemoryAddress/PC|352}}
|[[Magic Cape]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Magic Cape]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$353'''
|{{MemoryAddress/PC|353}}
|[[Magic Mirror]]
|[[Magic Mirror]]
|{{MemoryValue|00}} - Nothing
|{{MemoryValue|00}} - Nothing
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|{{MemoryValue|02}} - [[Magic Mirror]]
|{{MemoryValue|02}} - [[Magic Mirror]]
|-
|-
|'''$354'''|
|{{MemoryAddress/PC|354}}|
|Gloves
|Gloves
|{{MemoryValue|00}} - Nothing
|{{MemoryValue|00}} - Nothing
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|{{MemoryValue|02}} - [[Titan's Mitt]]
|{{MemoryValue|02}} - [[Titan's Mitt]]
|-
|-
|'''$355'''
|{{MemoryAddress/PC|355}}
|[[Pegasus Boots]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes || colspan="3"|&nbsp;||See '''$379'''.
|[[Pegasus Boots]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes || colspan="3"|&nbsp;||See '''$379'''.
|-
|-
|'''$356'''
|{{MemoryAddress/PC|356}}
|[[Zora's Flippers]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes || colspan="3" |&nbsp;||See '''$379'''.
|[[Zora's Flippers]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes || colspan="3" |&nbsp;||See '''$379'''.
|-
|-
|'''$357'''
|{{MemoryAddress/PC|357}}
|[[Moon Pearl]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|[[Moon Pearl]] || {{MemoryValue|00}} - No || {{MemoryValue|01}} - Yes
|-
|-
|'''$358'''||Unused
|{{MemoryAddress/PC|358}}||Presumed Unused
|-
|-
|'''$359'''
|{{MemoryAddress/PC|359}}
|[[Sword]]
|[[Sword]]
|{{MemoryValue|00}} - No Sword
|{{MemoryValue|00}} - No Sword
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|{{MemoryValue|04}} - [[Golden Sword]]
|{{MemoryValue|04}} - [[Golden Sword]]
|-
|-
|'''$35A'''
|{{MemoryAddress/PC|35A}}
|[[Shield]] || {{MemoryValue|00}} - No Shield
|[[Shield]] || {{MemoryValue|00}} - No Shield
|{{MemoryValue|01}} - [[Fighters' Shield]]
|{{MemoryValue|01}} - [[Fighters' Shield]]
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|{{MemoryValue|03}} - [[Mirror Shield]]
|{{MemoryValue|03}} - [[Mirror Shield]]
|-
|-
|'''$35B'''
|{{MemoryAddress/PC|35B}}
|[[Armor]]
|[[Armor]]
|{{MemoryValue|00}} - [[Green Mail]]
|{{MemoryValue|00}} - [[Green Mail]]
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|{{MemoryValue|02}} - [[Red Mail]]
|{{MemoryValue|02}} - [[Red Mail]]
|-
|-
|rowspan="2"|'''$35C''' to '''$35F'''||rowspan="2"|Bottle Contents
|rowspan="2"|{{MemoryAddress/PC|35C}} to {{MemoryAddress/PC|35F}}||rowspan="2"|Bottle Contents
|{{MemoryValue|00}} - No Bottle
|{{MemoryValue|00}} - No Bottle
|{{MemoryValue|01}} - [[Mushroom]]
|{{MemoryValue|01}} - [[Mushroom]]
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|{{MemoryValue|08}} - [[Good Bee]]
|{{MemoryValue|08}} - [[Good Bee]]
|-
|-
|'''$360''' to '''$361'''||Wallet Capacity||colspan="5"|&nbsp;||rowspan="2"|
|{{MemoryAddress/PC|360}} to {{MemoryAddress/PC|361}}||Wallet Capacity||colspan="5"|&nbsp;||rowspan="2"|
|-
|-
|'''$362''' to '''$363'''||[[Rupee]] Count
|{{MemoryAddress/PC|362}} to {{MemoryAddress/PC|363}}||[[Rupee]] Count
|}
|}


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|-
|-
|[[Compass]]1
|[[Compass]]1
|'''$364''' 
|{{MemoryAddress/PC|364}}
|rowspan="3"|Unused
|rowspan="3"|Unused
|rowspan="3"|Unused
|rowspan="3"|Unused
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|-
|-
|[[Big Key|BigKey]]1
|[[Big Key|BigKey]]1
|'''$366'''
|{{MemoryAddress/PC|366}}
|-
|-
|[[Dungeon Map]]1
|[[Dungeon Map]]1
|'''$368'''
|{{MemoryAddress/PC|368}}
|-
|-
|[[Compass]]2
|[[Compass]]2
|'''$365'''
|{{MemoryAddress/PC|365}}
|rowspan="3"|[[Misery Mire]]
|rowspan="3"|[[Misery Mire]]
|rowspan="3"|[[Palace of Darkness]]
|rowspan="3"|[[Palace of Darkness]]
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|-
|-
|[[Big Key|BigKey]]2
|[[Big Key|BigKey]]2
|'''$367'''
|{{MemoryAddress/PC|367}}
|-
|-
|[[Dungeon Map]]2
|[[Dungeon Map]]2
|'''$369'''
|{{MemoryAddress/PC|369}}
|}
|}


Wishing Pond Rupee '''$36A'''
'''Wishing Pond Rupee''': {{MemoryAddress/PC|36A}}
* Unused
* Presumed unused


[[Heart Piece]]s collected:
'''[[Heart Piece]]s collected''':{{MemoryAddress/PC|36B}}
*'''$36B'''. Number of heart pieces (out of four) you have earned
* Number of heart pieces (out of four) you have earned


Health: '''$36C'''
'''Health''': {{MemoryAddress/PC|36C}}
* Health Capacity. Each increment of {{MemoryValue|08}} is worth one heart.
* Health Capacity. Each increment of {{MemoryValue|08}} is worth one heart.
* {{MemoryValue|04}} is a half heart. The max is generally {{MemoryValue|A0}}. The game is coded to not accept health values beyond this.  
* {{MemoryValue|04}} is a half heart. The max is generally {{MemoryValue|A0}}. The game is coded to not accept health values beyond this.  
*'''$36D'''. Actual Health. Same as above, but this reflects your current health status rather than potential.
*'''$36D'''. Actual Health. Same as above, but this reflects your current health status rather than potential.


Magic Power: '''$36E'''
'''Magic Power''': {{MemoryAddress/PC|36E}}
* Magic power ranges from {{MemoryValue|00}} to {{MemoryValue|80}}. Each small bottle refills {{MemoryValue|10}}. Setting Magic above {{MemoryValue|80}} causes the magic meter to glitch and you can't use special items.
* Magic power ranges from {{MemoryValue|00}} to {{MemoryValue|80}}. Each small bottle refills {{MemoryValue|10}}. Setting Magic above {{MemoryValue|80}} causes the magic meter to glitch and you can't use special items.


[[Small Key]]s: '''$36F'''
'''[[Small Key]]s''': {{MemoryAddress/PC|36F}}
* Number of Keys you have in the dungeon you are currently in. If you're in a non-keyed dungeon it will generally read {{MemoryValue|FF}}.
* Number of Keys you have in the dungeon you are currently in. If you're in a non-keyed dungeon it will generally read {{MemoryValue|FF}}.


[[Bomb Capacity Upgrade]]s: '''$370'''
'''[[Bomb Capacity Upgrade]]s''': {{MemoryAddress/PC|370}}
* Number of bombs you can hold above the default value (10).
* Number of bombs you can hold above the default value (10).


[[Arrow Capacity Upgrade]]s: '''$371'''
'''[[Arrow Capacity Upgrade]]s''': {{MemoryAddress/PC|371}}
* Number of arrows you can hold above the default value (30)
* Number of arrows you can hold above the default value (30)


Hearts filler: '''$372'''
'''Hearts Filler''': {{MemoryAddress/PC|372}}
* Write to this location to fill in a set number of hearts. Make sure to write in a multiple of {{MemoryValue|08}} Otherwise, you will end up filling the whole life meter.
* Write to this location to fill in a set number of hearts. Make sure to write in a multiple of {{MemoryValue|08}} Otherwise, you will end up filling the whole life meter.


Magic filler: '''$373'''
'''Magic Filler''': {{MemoryAddress/PC|373}}
* Write to this location how much magic power you want filled up. The maximum effective value is {{MemoryValue|80}}.
* Write to this location how much magic power you want filled up. The maximum effective value is {{MemoryValue|80}}.


[[Pendant]]s: '''$374'''
'''[[Pendant]]s''': {{MemoryAddress/PC|374}}
* Bit 0: Red Pendant
<code>- - - - - g b r</code>
* Bit 1: Blue Blue Pendant
* <code>r</code> - Red Pendant
* Bit 2: Green Green Pendant
* <code>b</code> - Blue Pendant
* <code>g</code> - Green Pendant


Bomb filler: '''$375'''
Bomb filler: {{MemoryAddress/PC|375}}
* Write to this location to add X bombs to your arsenal. It will not exceed your maximum, as defined with '''$370'''.
* Number of bombs to be "filled" or added to the current bomb count. It will not exceed your maximum, defined at {{MemoryAddress/PC|370}}.


Arrow filler: '''$376'''
'''Arrow filler''': {{MemoryAddress/PC|376}}
* Write to this location to add X arrows to your arsenal. It will not exceed your maximum, as defined with '''$371'''.
* Number of arrows to be "filled" or added to the current arrow count. It will not exceed your maximum, defined at MemoryAddress/PC|371}}.


Arrows: '''$377'''
'''Arrows''': {{MemoryAddress/PC|377}}


????: '''$378'''
'''Unknown''': {{MemoryAddress/PC|378}}
* ????
* Presumed unused.


Ability Flags: '''$379'''
'''Ability Flags''': {{MemoryAddress/PC|379}}
* Bit 0:
<code>- r t - p d s -</code>
* Bit 1: Swim
* <code>s</code> - Swim
* Bit 2: Run / Dash
* <code>d</code> - Run / Dash
* Bit 3: Pull
* <code>p</code> - Pull
* Bit 4: ----
* <code>t</code> - Talk
* Bit 5: Talk
* <code>r</code> - Read
* Bit 6: Read
* Bit 7: ----


[[Crystal]]s: {{MemoryAddress/PC|37A}}
'''[[Crystal]]s''': {{MemoryAddress/PC|37A}}
* Bit 0: Crystal 6
<code>- 3 4 2 7 5 1 6</code>
* Bit 1: Crystal 1
* Bit 2: Crystal 5
* Bit 3: Crystal 7
* Bit 4: Crystal 2
* Bit 5: Crystal 4
* Bit 6: Crystal 3


Magic Consumption: '''$37B'''
'''Magic Consumption''': {{MemoryAddress/PC|37B}}
* {{MemoryValue|00}}: Normal Consumption
* {{MemoryValue|00}}: Normal Consumption
* {{MemoryValue|01}}: 1/2 Consumption ([[1/2 Magic]])
* {{MemoryValue|01}}: 1/2 Consumption ([[1/2 Magic]])
* {{MemoryValue|02}}: 1/4 Consumption ([[1/4 Magic]])
* {{MemoryValue|02}}: 1/4 Consumption ([[1/4 Magic]])


Keys earned per dungeon:
'''Keys earned per dungeon''':
* '''Sewer Passage''': {{MemoryAddress/PC|37C}}
* '''Sewer Passage''': {{MemoryAddress/PC|37C}}
* [[Hyrule Castle]]: {{MemoryAddress/PC|37D}}
* [[Hyrule Castle]]: {{MemoryAddress/PC|37D}}
Line 383: Line 378:




Progress Indicator '''$3C5''': (TODO: Check these for rando)
'''Progress Indicator''': {{MemoryAddress/PC|3C5}}: (TODO: Check these for rando)
* {{MemoryValue|00}} = Unset, Will put Link in his bed state at the beginning of the game. (Also can't use sword or shield)
* {{MemoryValue|00}} = Unset, Will put Link in his bed state at the beginning of the game. (Also can't use sword or shield)
* {{MemoryValue|01}} = You have a sword and start in the castle on start up.
* {{MemoryValue|01}} = You have a sword and start in the castle on start up.
Line 390: Line 385:
* {{MemoryValue|04}} and above = meaningless. Though, you could write code using them to expand the event system perhaps.
* {{MemoryValue|04}} and above = meaningless. Though, you could write code using them to expand the event system perhaps.


Progress Flags '''$3C6''' (bitflags):
'''Progress Flags''': {{MemoryAddress/PC|3C6}} (TODO)


* Progress flags in the vanilla game. Usually set to {{MemoryValue|18}} or {{MemoryValue|20}} in randomizer.
* Progress bit flags in the vanilla game. Usually set to {{MemoryValue|18}} or {{MemoryValue|20}} in randomizer.


Map Icons Indicator 2 '''$3C7''':
'''Map Icons Indicator 2''': {{MemoryAddress/PC|3C7}}


* Presumed to be unused in randomizer.  
* Presumed unused in randomizer.  


Starting Entrance to use: '''$3C8''': Abbreviations:
'''Starting Entrance to use''': {{MemoryAddress/PC|3C8}}
* LH = [[Link's House]];
* SA = [[Sanctuary]];
* MC = [[Mountain Cave]];
* PP = [[Pyramid of Power]] in DW; 
   
* {{MemoryValue|00}} = Start the game in [[Link's House]] always.
* {{MemoryValue|00}} = Start the game in [[Link's House]] always.
* {{MemoryValue|01}} = [[Sanctuary|SA]].
* {{MemoryValue|01}} = Staring location menu or [[Pyramid of Power]] if Aga has been killed and the player has the Mirror.
* {{MemoryValue|02}} = Start in {{Dungeon Location|Hyrule Castle|Zelda's Cell}} (entrance index sanc?).
* {{MemoryValue|02}} = Start in {{Dungeon Location|Hyrule Castle|Zelda's Cell}}.
* {{MemoryValue|03}} = [[Secret Passage]] under [[Hyrule Castle]] garden (near dying uncle).
* {{MemoryValue|03}} = [[Secret Passage]] or [[Hyrule Castle]] front entrance if you've entered the castle.
* {{MemoryValue|05}} = [[Link's House|LH]] or [[Sanctuary|SA]] or [[Mountain Cave|MC]].
* {{MemoryValue|04}} = Castle Throne Room in [[Standard State|Standard mode]]. Set when you touch the mantle.
       
* {{MemoryValue|05}} = Start in the Old Man Cave with the Old Man.


Progress Indicator 3 (bitwise) '''$3C9}}:
'''Progress Indicator 3 (bitwise)''': {{MemoryAddress/PC|3C9}}: (TODO)
* {{MemoryValue|00}} = [[Hobo]] gave you his item.
* {{MemoryValue|00}} = [[Hobo]] gave you his item.
* {{MemoryValue|01}} = [[Bottle Merchant]] gave you his item.
* {{MemoryValue|01}} = [[Bottle Merchant]] gave you his item.
Line 421: Line 411:
* {{MemoryValue|07}} = [[Blacksmith]]s have your sword (unset when sword returned)
* {{MemoryValue|07}} = [[Blacksmith]]s have your sword (unset when sword returned)


Lightworld / Darkworld '''$3CA''':
'''Lightworld / Darkworld''': {{MemoryAddress/PC|3CA}}
* {{MemoryValue|00}}
* {{MemoryValue|00}}
* {{MemoryValue|01}}
* {{MemoryValue|01}}
Line 431: Line 421:
* {{MemoryValue|07}}
* {{MemoryValue|07}}


Unused? '''$3CB''':
'''Unused''': {{MemoryAddress/PC|3CB}}
* ?????
* Presumed unused.


'''$3CC'''['''0x01'''] - (Tagalong)
'''Follower''': {{MemoryAddress/PC|3CC}} (TODO)
* Tagalong Indicator (who is following you, if anyone?) (value based)
* Tagalong Indicator (who is following you, if anyone?) (value based)
      
      
Line 461: Line 451:
* Cached X coordinate of Tagalong after it has been lost by the player. Applies to the old man and to the super bomb, at the very least. This is intended to be used not as a save game variable, but rather as a means of picking the Tagalong back up by getting in contact with it.
* Cached X coordinate of Tagalong after it has been lost by the player. Applies to the old man and to the super bomb, at the very least. This is intended to be used not as a save game variable, but rather as a means of picking the Tagalong back up by getting in contact with it.


'''$3D1''':
'''Unknown''': {{MemoryAddress/PC|3D1}} - {{MemoryAddress/PC|3D2}}
* ????
* Presumed unused
 
'''$3D2''':


'''$3D3''':
'''Big Bomb''': {{MemoryAddress/PC|3D3}}
* Set to {{MemoryValue|00}} normally. Set to {{MemoryValue|80}} if a Super Bomb is going off.
* Set to {{MemoryValue|00}} normally. Set to {{MemoryValue|80}} if a Big Bomb is going off.


'''$3D4''' to '''$3D8''':
'''Unknown''': {{MemoryAddress/PC|3D4}} to {{MemoryAddress/PC|3D8}}
* ????
* Presumed unused.


Player's Name (first four characters) '''$3D9''' to '''$3E4''':
'''Player's Name''' (first four characters): {{MemoryAddress/PC|3D9}} to {{MemoryAddress/PC|3E4}}
* The randomizer base ROM does not use the 2nd and 3rd save files, so the player can use all 12 characters for their name. The first four are here. The remaining characters can be found in two locations: immediately after the following checksum validity value and at {{MemoryValue|500}} - {{MemoryValue|50F}}
* The randomizer base ROM does not use the 2nd and 3rd save files, so the player can use all 12 characters for their name. The first four are here. The remaining characters can be found in two locations: immediately after the following checksum validity value and at {{MemoryValue|500}} - {{MemoryValue|50F}}
* Note each of the six letters is represented by a 16-bit number.
* Note each of the six letters is represented by a 16-bit number.


Validity (Checksum) of the File:
''Validity (Checksum) of the File''': {{MemoryAddress/PC|3E5}} to {{MemoryAddress/PC|3E6}}
'''$3E5''' to '''$3E6''':
* There is a subroutine in the ROM that checks to make sure this word value is {{MemoryValue|55AA}}. If changed, the save file will be deleted when the game boots.
* There is a subroutine in the ROM that checks to make sure this word value is {{MemoryValue|55AA}}. If changed, the save file will be deleted when the game boots.


'''$3E7''' to '''$3F0'''
'''Player's Name''' (characters 6-12) {{MemoryAddress/PC|3E7}} to {{MemoryAddress/PC|3F0}}
* Characters 6-12 of the file name. Note that the above validity value occupies the space where the 6th character would be if the full name were present here.
* Characters 6-12 of the file name. Note that the above validity value occupies the space where the 5th character would be if the full name were present here.


=== '''0x3F1''' to '''0x467''' - Game Stats ===
=== '''Game Stats''': {{MemoryAddress/PC|3F1}} to {{MemoryAddress/PC|467}} ===


{{MemoryAddress/PC|3F1}} to {{MemoryAddress/PC|402}}
{{MemoryAddress/PC|3F1}} to {{MemoryAddress/PC|402}}

Revision as of 14:09, 3 April 2020

Overview

This document is intended to be an SRAM reference for the randomizer base ROM. The base ROM expands the SRAM size to 32k and removes the last two save files. Credit to MathOnNapkins, the editors of the vanilla ALttP wiki, and the randomizer ROM developers who have documented nearly all of this information elsewhere.

Notes

  • Offsets on this page start from 0x7EF000* in RAM and at 0x00* in an .sram file.
  • When bytes are laid out as individual bits, this represents either individual bit flags within the byte or densely packed integers (i.e., smaller than one byte.)
  • Values bigger than one byte are little-endian (e.g. a 16-bit number that is #$55 #$AA in a hex editor or debugger is actually #$AA55.)

SRAM Map

Room Data: 0x000* to 0x24F*

There are 296 (#$128) rooms in in the ROM. Each room's data occupies one word, or two bytes.

High Byte
128 64 32 16 8 4 2 1
d d d d b k c/k c/r
Low Byte
128 64 32 16 8 4 2 1
c c c c q q q q


  • d - door opened (either unlocked, bombed or other means)
  • b - boss battle won
  • k - key or item (such as a 300 rupee gift)
  • c - chest, big key chest, or big key lock. Any combination of them totaling to 6 is valid.
  • r - special rupee tiles, whether they've been obtained or not.
  • q - quadrants visited:

The quadrant bits corresponds to quadrants 4, 3, 2, and 1 in that order which is also how the quadrants are laid out on a tile from left to right (upper left, upper right, lower left, lower right), so if quadrants 4 and 1 have been "seen" by Link, then qqqq will look like 1001.

Unused: 0x250* to 0x27F*

  • Presumed unused in both vanilla and randomizer.

Overworld Event Information: 0x280* to 0x2FF*

Each area occupies one byte.

? h o ? ? ? s ?

  • o - If set, the area will draw its designated overlay when you enter it. e.g. If you're triggered misery mire then the entrance shows up there the next time you enter that area. You can view overlays in the latest release of Hyrule Magic. Other overlays include stairs leading underground, and the removal of the weather vane after it has exploded.
  • s - If set, the area will draw its secondary overlay when you enter it.
  • h - If set, heart piece has been collected in this area already. Also used for a handful of other sprites.
  • ? - Unknown, possibly unused.

Shop Purchase Counts: 0x300* to 0x33F*

The randomizer ROM uses new shop code to handle loading and configuration of shops which allows the higher-level item and entrance randomizers to use clean, convenient abstractions for changing them. The higher-level randomizers can dictate a certain number of times that a shop item can be re-purchased (e.g. you can only buy capacity upgrades seven times.) The bytes here (except for $300 which is currently unknown) are used to count how many times a single item in a shop has been purchased. They are dynamically assigned at generation time, which is to say that any single byte should not be considered statically bound to a certain item in a shop. Take-Any caves as well as the old man with the sword in Retro world state are considered shops in this context.

Note 1: This is noted as a "temporary home" for the shop purchase counts in the base rom's source code

Note 2: Jumping into deep water without flippers and being placed back on land on the Hobo and Zora's Domain maps are known to overwrite 0x302* and 0x304* respectively. This has no effect if a shop item can always be repurchased, but will lead to unintended behavior if the item can only be purchased a limited amount of times.

Items & Equipment: 0x340* to 0x38B*

Address Item Values Notes
0x340* Bow 0x00* - Nothing 0x01* - Bow 0x02* - Bow & Arrows 0x03* - Silver Arrow Bow 0x04* - Bow & Silver Arrows
0x341* Boomerang 0x00* - Nothing 0x01* - Blue 0x02* - Red
0x342* Hookshot 0x00* - No 0x01* - Yes
0x343* Bombs How many bombs you have   Can exceed 0x32*, up to 0xFF*.
0x344* Magic Powder 0x00* - Nothing 0x01* - Mushroom 0x02* - Magic Powder
0x345* Fire Rod 0x00* - No 0x01* - Yes
0x346* Ice Rod 0x00* - No 0x01* - Yes
0x347* Bombos Medallion 0x00* - No 0x01* - Yes
0x348* Ether Medallion 0x00* - No 0x01* - Yes
0x349* Quake Medallion 0x00* - No 0x01* - Yes
0x34A* Lamp 0x00* - No 0x01* - Yes
0x34B* Magic Hammer 0x00* - No 0x01* - Yes
0x34C* Flute 0x00* - Nothing 0x01* - Shovel 0x02* - Flute 0x03* - Flute & Bird
0x34D* Bug-Catching Net 0x00* - No 0x01* - Yes
0x34E* Book of Mudora 0x00* - No 0x01* - Yes
0x34F* Bottle Index 0x00* - Nothing 0x01* - Bottle 1 (0x7EF35C*) 0x02* - Bottle 2 (0x7EF35D*) 0x03* - Bottle 3 (0x7EF35E*) 0x04* - Bottle 4 (0x7EF35F*)
0x350* Cane of Somaria 0x00* - No 0x01* - Yes
0x351* Cane of Byrna 0x00* - No 0x01* - Yes
0x352* Magic Cape 0x00* - No 0x01* - Yes
0x353* Magic Mirror 0x00* - Nothing 0x01* - Magic Scroll 0x02* - Magic Mirror
Gloves 0x00* - Nothing 0x01* - Power Glove 0x02* - Titan's Mitt
0x355* Pegasus Boots 0x00* - No 0x01* - Yes   See $379.
0x356* Zora's Flippers 0x00* - No 0x01* - Yes   See $379.
0x357* Moon Pearl 0x00* - No 0x01* - Yes
0x358* Presumed Unused
0x359* Sword 0x00* - No Sword 0x01* - Fighters' Sword 0x02* - Master Sword 0x03* - Tempered Sword 0x04* - Golden Sword
0x35A* Shield 0x00* - No Shield 0x01* - Fighters' Shield 0x02* - Fire Shield 0x03* - Mirror Shield
0x35B* Armor 0x00* - Green Mail 0x01* - Blue Mail 0x02* - Red Mail
0x35C* to 0x35F* Bottle Contents 0x00* - No Bottle 0x01* - Mushroom 0x02* - Empty Bottle 0x03* - Red Potion 0x04* - Green Potion
0x05* - Blue Potion 0x06* - Fairy 0x07* - Bee 0x08* - Good Bee
0x360* to 0x361* Wallet Capacity  
0x362* to 0x363* Rupee Count
Item Address Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7
Compass1 0x364* Unused Unused Ganon's Tower Turtle Rock Thieves' Town Tower of Hera Ice Palace Skull Woods
BigKey1 0x366*
Dungeon Map1 0x368*
Compass2 0x365* Misery Mire Palace of Darkness Swamp Palace Hyrule Castle Tower Desert Palace Eastern Palace Hyrule Castle Sewer Passage
BigKey2 0x367*
Dungeon Map2 0x369*

Wishing Pond Rupee: 0x36A*

  • Presumed unused

Heart Pieces collected:0x36B*

  • Number of heart pieces (out of four) you have earned

Health: 0x36C*

  • Health Capacity. Each increment of 0x08* is worth one heart.
  • 0x04* is a half heart. The max is generally 0xA0*. The game is coded to not accept health values beyond this.
  • $36D. Actual Health. Same as above, but this reflects your current health status rather than potential.

Magic Power: 0x36E*

  • Magic power ranges from 0x00* to 0x80*. Each small bottle refills 0x10*. Setting Magic above 0x80* causes the magic meter to glitch and you can't use special items.

Small Keys: 0x36F*

  • Number of Keys you have in the dungeon you are currently in. If you're in a non-keyed dungeon it will generally read 0xFF*.

Bomb Capacity Upgrades: 0x370*

  • Number of bombs you can hold above the default value (10).

Arrow Capacity Upgrades: 0x371*

  • Number of arrows you can hold above the default value (30)

Hearts Filler: 0x372*

  • Write to this location to fill in a set number of hearts. Make sure to write in a multiple of 0x08* Otherwise, you will end up filling the whole life meter.

Magic Filler: 0x373*

  • Write to this location how much magic power you want filled up. The maximum effective value is 0x80*.

Pendants: 0x374* - - - - - g b r

  • r - Red Pendant
  • b - Blue Pendant
  • g - Green Pendant

Bomb filler: 0x375*

  • Number of bombs to be "filled" or added to the current bomb count. It will not exceed your maximum, defined at 0x370*.

Arrow filler: 0x376*

  • Number of arrows to be "filled" or added to the current arrow count. It will not exceed your maximum, defined at MemoryAddress/PC|371}}.

Arrows: 0x377*

Unknown: 0x378*

  • Presumed unused.

Ability Flags: 0x379* - r t - p d s -

  • s - Swim
  • d - Run / Dash
  • p - Pull
  • t - Talk
  • r - Read

Crystals: 0x37A* - 3 4 2 7 5 1 6

Magic Consumption: 0x37B*

  • 0x00*: Normal Consumption
  • 0x01*: 1/2 Consumption (1/2 Magic)
  • 0x02*: 1/4 Consumption (1/4 Magic)

Keys earned per dungeon:

Inventory Item Tracking: 0x38C*

b r m p n s k f

b - Blue Boomerang

r - Red Boomerang

m - Mushroom Current

p - Magic Powder

n - Mushroom Past (turned in to the Witch)

s - Shovel

k - Inactive Flute

f - Active Flute

Inventory Bow Tracking: 0x38E*

b s p - - - - -

b - Bow

s - Silver Arrow Bow

p - Second Progressive Bow

  • There are two Progressive Bow items in the game. The p bit represents whether the player has collected the "second" Progressive Bow independent of the "first." It does not indicate whether the player has silver arrows or not.


Progress Indicator: 0x3C5*: (TODO: Check these for rando)

  • 0x00* = Unset, Will put Link in his bed state at the beginning of the game. (Also can't use sword or shield)
  • 0x01* = You have a sword and start in the castle on start up.
  • 0x02* = Indicates you have completed Hyrule Castle Escape.
  • 0x03* = Indicates you have beaten Agahnim in Hyrule Castle Tower and are now searching for crystals.
  • 0x04* and above = meaningless. Though, you could write code using them to expand the event system perhaps.

Progress Flags: 0x3C6* (TODO)

  • Progress bit flags in the vanilla game. Usually set to 0x18* or 0x20* in randomizer.

Map Icons Indicator 2: 0x3C7*

  • Presumed unused in randomizer.

Starting Entrance to use: 0x3C8*

Progress Indicator 3 (bitwise): 0x3C9*: (TODO)

Lightworld / Darkworld: 0x3CA*

  • 0x00*
  • 0x01*
  • 0x02*
  • 0x03*
  • 0x04*
  • 0x05*
  • 0x06* = In Dark World, unset is in Light World
  • 0x07*

Unused: 0x3CB*

  • Presumed unused.

Follower: 0x3CC* (TODO)

  • Tagalong Indicator (who is following you, if anyone?) (value based)

Note: Don't use a value of 0x0F* or larger here, as it will likely crash the game.

  • 0x00* = Tagalong disabled
  • 0x01* = Princess Zelda
  • 0x02* = ???
  • 0x03* = ???
  • 0x04* = Old Man?
  • 0x05* = Zelda (invisible) bitching at you about coming to rescue her.
  • 0x06* = Blind Maiden
  • 0x07* = Blacksmith Frog (smithyfrog as I call him) in DW
  • 0x08* = Blacksmith Dwarf in LW
  • 0x09* = Middle Aged Guy w/ Sign
  • 0x0A* = Kiki
  • 0x0B* = ???
  • 0x0C* = Purple Chest
  • 0x0D* = Super Bomb
  • 0x0E* = Activated in reaction to acquiring the Master Sword. Used to trigger a telepathic message from Zelda indicating that Agahnim's goons have come for her at Sanctuary.

$03CD[0x02] -

  • Cached Y coordinate of Tagalong after it has been lost by the player. Applies to the old man and to the super bomb, at the very least. This is intended to be used not as a save game variable, but rather as a means of picking the Tagalong back up by getting in contact with it.

$03CF[0x02] -

  • Cached X coordinate of Tagalong after it has been lost by the player. Applies to the old man and to the super bomb, at the very least. This is intended to be used not as a save game variable, but rather as a means of picking the Tagalong back up by getting in contact with it.

Unknown: 0x3D1* - 0x3D2*

  • Presumed unused

Big Bomb: 0x3D3*

  • Set to 0x00* normally. Set to 0x80* if a Big Bomb is going off.

Unknown: 0x3D4* to 0x3D8*

  • Presumed unused.

Player's Name (first four characters): 0x3D9* to 0x3E4*

  • The randomizer base ROM does not use the 2nd and 3rd save files, so the player can use all 12 characters for their name. The first four are here. The remaining characters can be found in two locations: immediately after the following checksum validity value and at 0x500* - 0x50F*
  • Note each of the six letters is represented by a 16-bit number.

Validity (Checksum) of the File': 0x3E5* to 0x3E6*

  • There is a subroutine in the ROM that checks to make sure this word value is 0x55AA*. If changed, the save file will be deleted when the game boots.

Player's Name (characters 6-12) 0x3E7* to 0x3F0*

  • Characters 6-12 of the file name. Note that the above validity value occupies the space where the 5th character would be if the full name were present here.

Game Stats: 0x3F1* to 0x467*

0x3F1* to 0x402*

  • Presumed unused

Life/Save Counter: 0x403* to 0x404*

  • Counts the number of times your saved or died in the game before you beat it.

Post-Game Death Counter: 0x405* to 0x406*

  • When you start the game this is written to with the value -1 (0xFFFF*). On the game select screen, it will only display a number if this is not 0xFFFF*. The max displayable number is 999.

When you beat the game, the number of times you died gets recorded here.

Bonk Counter: 0x420*

  • Counts a maximum of 99 bonks

A/Y Items: 0x421*

y y y y y a a a

  • y - Y item count represented as five bit integer. There are a total of 27 Y items.
  • a - A item count represented as a three bit integer. Five in total.

Swords & Shields: 0x422*

  • w w w h h - - -
  • Number of swords and shields collected represented as three and two bit integers respectively.
  • w - Swords
  • h - Shields

Total Items Collected: 0x423*

Mails & Small Keys: 0x424*

m m k k k k k k

  • Number of mails and small keys collected represented as two and six bit integers respectively.
  • m - Mails
  • k - Small Keys

Tempered & Gold Sword Boss Kills: 0x425*

t t t t g g g g

Fighter & Master Sword Boss Kills: 0x426*

f f f f m m m m

  • Number of bosses killed with each sword represented as four byte integers.
  • t - Tempered Sword
  • g - Gold Sword
  • f - Fighter Sword
  • m - Master Sword

Big Keys & Big Chests: 0x427*

k k k k c c c c

  • Number of big keys collected and big chests opened represented as four bit integers.
  • k - Big Keys
  • c - Big Chests

Maps & Compasses: 0x428*

m m m m c c c c

  • Number of maps and compasses collected represented as four bit integers.
  • m - Maps
  • c - Compasses

Heart Pieces & Pendants: 0x429*

h h h h - - p p

  • Number of heart pieces and pendants collected represented as four and two bit integers respectively.
  • h - Heart Pieces
  • c - Pendants

Ganon's Tower Big Key: 0x42A*

- - - l l l l l

  • Locations checked in Ganon's Tower up to and including the Big Key represented as a five bit integer.

Rupees Spent: 0x42B* - 0x42C*

  • Number of rupees spent in game.

Save and Quits: 0x42D*

  • Number of times the player has saved and quit.

Loop Time: 0x42E* - 0x431*

  • Total loop time (?) measured in frames.
  • Used in calculating the lag time.

Locations Pre-Boots: 0x432*

  • Number of locations checked before the Pegasus Boots are found.

Locations Pre-Mirror: 0x433*

  • Number of locations checked before the Magic Mirror is found.

Hyrule Castle & Palace of Darkness: 0x434*

h h h h p p p p

  • Locations checked in Hyrule Castle and Palace of Darkness represented as four bit integers.
  • h - Hyrule Castle
  • p - Palace of Darkness

Desert Palace, Tower of Hera, and Agahnim's Tower: 0x435*

d d h h a a a a

  • Locations checked in Desert Palace, Tower of Hera, and Agahnim's Tower represented as two, two, and four bit integers respectively.
  • d - Desert Palace
  • h - Tower of Hera
  • a - Agahnim's Tower

Ganon's Tower & Eastern Palace: 0x436*

g g g g g e e e

  • Locations checked in Ganon's Tower and Eastern Palace represented as five and three bit integers respectively.
  • g - Ganon's Tower
  • e - Eastern Palace

Skull Woods & Thieves' Town: 0x437*

s s s s t t t t

  • Locations checked in Skull Woods & Thieves' Town represented as four bit intgers.
  • s - Skull Woods
  • t - Thieves' Town

Ice Palace & Misery Mire: 0x438*

i i i i m m m m

  • Locations checked in Ice Palace and Misery Mire represented as four bit intgers.
  • i - Ice Palace
  • m - Misery Mire

Turtle Rock & Swamp Palace: 0x439*

t t t t s s s s

  • Locations checked in Turtle Rock and Swamp Palace represented as four bit intgers.
  • t - Turtle Rock
  • s - Swamp Palace

Overworld Mirrors: 0x43A*

  • Number of times the Magic Mirror is used on the overworld.

Underworld Mirrors: 0x43B*

  • Number of times the Magic Mirror is used in dungeons.

Screen Transitions: 0x43C* - 0x43D*

  • Number of screen transitions.

Total Time: 0x43E* - 0x441*

  • Total amount of time played measured in frames.

Chests Opened: 0x442*

  • Number of chests opened. Does not count NPC and free standing items.

Menu Time: 0x444* - 0x447*

  • Total amount of time spent in the item menu measured in frames.

Heart Pieces: 0x448*

  • Total number of Heart Pieces collected.

Deaths: 0x449*

  • Total deaths.

Times Flutes: 0x44B*

  • Number of times the active Flute was used.

Swordless Bosses & Capacity Upgrades: 0x452*

b b b b c c c c

  • Number of bosses defeated without a sword and number of capacity upgrades purchased represented as four bit integers.

b - Bosses killed without a sword

c - Capacity upgrades purchased

Faerie Revivals: 0x453*

  • Number of times the player has been revived by a faerie.

First Sword Found: 0x458* - 0x45B*

  • Time when the player collected their first sword, measured in frames.

Boots Found: 0x45C* - 0x45F*

  • Time when the player collected the Pegasus Boots, measured in frames.

Flute Found: 0x460* - 0x463*

  • Time when the player collected the Flute, measured in frames.

Mirror Found: 0x464* - 0x467*

  • Time when the player collected the Magic Mirror, measured in frames.

0x468* - 0x4FD*

  • Unknown, presumed unused except for a rando-specific file marker at 0x4F0*, which will always be 0xFF* on an active save file.

Checksum

Inverse Checksum: 0x4FE* to 0x4FF*

The SRAM save loading routine relies upon an "inverse" checksum. Changes to any byte in the SRAM between 0x00* and 0x4FE* must be added or subtracted to this checksum or the save file will be deleted. The checksum can be computed by adding every word between the beginning of the file and 0x4FE* and subtracting the sum from 0x5A5A*, using overflowing arithmetic for both operations.

Appendices

Appendix 1: Character Codes

TODO: These character values are very different in JP1.0

Alpha-numeric

00 = A
01 = B
02 = C
03 = D
04 = E
05 = F
06 = G
07 = H
08 = I^
09 = J
0A = K
0B = L
0C = M
0D = N
OE = O
OF = P
10 = ??
20 = Q
21 = R
22 = S
23 = T
24 = U
25 = V
26 = W
27 = X
28 = Y
29 = Z
2A = a
2B = b
2C = c
2D = d
2E = e
2F = f
40 = g
41 = h
42 = k
43 = j
44 = i
45 = l
46 = m
47 = n
48 = o
49 = p
4A = q
4B = r
4C = s
4D = t
4E = u
4F = v
60 = w
61 = x
62 = y
63 = z
64 = 0
65 = 1
66 = 2
67 = 3
68 = 4
69 = 5
6A = 6
6B = 7
6C = 8
6D = 9
6E = "?"
6F = "!"
80 = " = "
81 = "."
82 = ","

85 = "("
86 = ")"

Special characters (not normally accessible. This is by far an incomplete listing)

0xA0* small right Arrow
0xA1* "'" (apostrophe)
0xA2* HPiece Again
0xA3* "empty right hand heart cont."
0xA4* see
0xA7*
0xA5* Same As
0xA7*
0xA6* "Quarter Heart piece, top right corner."
0xA7* "Heart piece,left half"
0xA8* "Heart piece, right half"
0xA9* blank
0xAA* "left Arrow"

Appendix 2: SNES Button Alphabet

0xAB* A
0xAC* B
0xAD* X
0xAE* Y
0xAF* I
0xB1* blank^

^This code is not the canon encoding of this character. ex. 0xAF* is the proper "I". 0x08* is not.