Move more data tables into data/ files.

constants/audio_constants.asm

@@ -1,4 +1,5 @@
 ; pitch
+; FrequencyTable indexes (see data/audio/notes.asm)
 	const_def
 	const __ ; 0
 	const C_ ; 1

constants/map_constants.asm

@@ -7,8 +7,8 @@ MAP_NONE   EQU 0
 ; map group ids
 ; `newgroup` indexes are for:
 ; - MapGroupPointers (see maps/map_headers.asm)
-; - OutdoorSprites (see engine/overworld.asm)
-; - MapGroupRoofs (see tilesets/roofs.asm)
+; - OutdoorSprites (see data/outdoor_sprites.asm)
+; - MapGroupRoofs (see data/mapgroup_roofs.asm)
 ; `mapgroup` indexes are for the sub-tables of MapGroupPointers (see maps/map_headers.asm)
 	const_def
 

constants/trainer_constants.asm

@@ -2,8 +2,8 @@
 ; `trainerclass` indexes are for:
 ; - TrainerClassAttributes (see trainers/attributes.asm)
 ; - TrainerClassDVs (see trainers/dvs.asm)
+; - TrainerEncounterMusic (see trainers/encounter_music.asm)
 ; - TrainerGroups (see trainers/trainer_pointers.asm)
-; - TrainerEncounterMusic (see audio/trainer_encounters.asm)
 ; - BTTrainerClassGenders (see misc/battle_tower_47.asm)
 ; trainer constants are Trainers indexes, for the sub-tables of TrainerGroups (see trainers/trainers.asm)
 	enum_start

constants/wram_constants.asm

@@ -48,6 +48,11 @@ const_value SET -1
 	const LEFT     ; 2
 	const RIGHT    ; 3
 
+DOWN_MASK  EQU 1 << DOWN
+UP_MASK    EQU 1 << UP
+LEFT_MASK  EQU 1 << LEFT
+RIGHT_MASK EQU 1 << RIGHT
+
 ; FacingDirection: ; d044
 FACE_CURRENT EQU 0
 FACE_DOWN  EQU 8