script_variable_meanings.txt: Followup script engine implementation research

[UsernameFodder]

See the follow-up ideas suggested in https://github.com/UsernameFodder/pmdsky-debug/pull/143#issue-1729618573. It would probably be enlightening to dig into how the script engine is actually implemented in the game's code. Further understanding on this front would probably complement the community's current high-level understanding of scripting, and could be mutually beneficial for both sides.

Existing information

• arm9.yml already has a block of functions obviously related to the script engine in the [NA]0x204B*** and [NA]0x204C*** area.
• overlay11.yml has some particularly important-sounding functions like ScriptCommandParsing and ScriptSpecialProcessCall.
• ram.yml has a couple data symbols that seem to back certain script variables.
• enum script_var_id, and enum special_process_id, have useful notes.

Relevant addresses These NA addresses are mentioned in the comments of enum script_var_id and could use symbol-ification:

• [ ] VAR_VERSION: 0x204C448
• [ ] VAR_DUNGEON_SELECT: 0x22E1DC8, 0x22DDA78
• [ ] VAR_DUNGEON_ENTER: 0x204E848, 0x204E8BC, 0x204F1D0, 0x22E8A58, 0x22DDA88
• [ ] VAR_REQUEST_CLEAR_COUNT: 0x22E6D34
• [ ] VAR_PLAYER_KIND: 0x20650E8, 0x2065188
• [ ] VAR_ATTENDANT1_KIND: 0x20651BC, 0x22F7EEC
• [ ] VAR_ATTENDANT2_KIND: 0x20651CC
• [ ] VAR_HERO_FIRST_KIND: 0x2048868
• [ ] VAR_HERO_FIRST_NAME: 0x2048878
• [ ] VAR_PARTNER_FIRST_KIND: 0x20488D8
• [ ] VAR_PARTNER_FIRST_NAME: 0x20488E8
• [ ] VAR_HERO_TALK_KIND: 0x204893C
• [ ] VAR_PARTNER_TALK_KIND: 0x209CCE4, 0x204897C
• [ ] VAR_RANDOM_REQUEST_NPC03_KIND: 0x2065BA4, 0x205EB5C
• [ ] VAR_CONFIG_COLOR_KIND: 0x20AFF28, 0x2048990
• [ ] VAR_ROM_VARIATION: 0x204B0E4
• [ ] VAR_GAME_MODE: 0x204B018, 0x2065D1C
• [ ] VAR_SPECIAL_EPISODE_TYPE: 0x204C910
• [ ] VAR_SPECIAL_EPISODE_CONQUEST: 0x204CA30
• [ ] VAR_DUNGEON_ENTER_LIST: 0x204CEE0
• [ ] VAR_WORLD_MAP_LEVEL: 0x204CDF8, 0x204CDD8
• [ ] VAR_POSITION_X: 0x22E0E10, 0x22E0D18
• [ ] VAR_POSITION_Y: 0x22E0E28, 0x22E0D30
• [ ] VAR_POSITION_HEIGHT: 0x22E0E40, 0x22E0D48
• [ ] VAR_POSITION_DIRECTION: 0x22E0E58, 0x22E0D60
• [ ] VAR_SUB30_TREASURE_DISCOVER: 0x2012078, 0x2011AB8
• [ ] VAR_SUB30_SPOT_DISCOVER: 0x2012100, 0x2011AB8
• [ ] VAR_RECYCLE_COUNT: 0x2012004, 0x2011AB8
• [ ] VAR_SUB30_SPOT_LEVEL: 0x20120F0, 0x2011AB8

[UsernameFodder]

@Adex-8x Feel free to add more thoughts here if you have them, or amend the additions made in https://github.com/UsernameFodder/pmdsky-debug/pull/143 if you see fit.