Add labels for ram values discovered while disassembling battle music.

main.asm

@@ -5639,17 +5639,17 @@ INCBIN "baserom.gbc",$2C41a,$2ee8f - $2C41a
 
 ; XXX this is not the start of the routine
 ; determine what music plays in battle
-	ld a, [$d22f] ; are we fighting a trainer?
+	ld a, [OtherTrainerClass] ; are we fighting a trainer?
 	and a
 	jr nz, .trainermusic
 	ld a, BANK(RegionCheck)
 	ld hl, RegionCheck
-	rst $8 ; XXX check region
+	rst $8
 	ld a, e
 	and a
 	jr nz, .kantowild
 	ld de, $0029 ; johto daytime wild battle music
-	ld a, [$d269] ; check time of day
+	ld a, [TimeOfDay] ; check time of day
 	cp $2 ; nighttime?
 	jr nz, .done ; if no, then done
 	ld de, $004a ; johto nighttime wild battle music
@@ -5685,12 +5685,12 @@ INCBIN "baserom.gbc",$2C41a,$2ee8f - $2C41a
 	jr c, .done
 
 	ld de, $0030 ; rival battle music
-	ld a, [$d22f]
+	ld a, [OtherTrainerClass]
 	cp RIVAL1
 	jr z, .done
 	cp RIVAL2
 	jr nz, .othertrainer
-	ld a, [$d231] ; which rival are we fighting?
+	ld a, [OtherTrainerID] ; which rival are we fighting?
 	cp $4
 	jr c, .done ; if it's not the fight inside Indigo Plateau, we're done
 	ld de, $002f ; rival indigo plateau battle music
@@ -117026,10 +117026,11 @@ RegionCheck: ; 0x1caea1
 	jr z, .johto
 	cp $0 ; special
 	jr nz, .checkagain
-; XXX if in map $00, load map group / map id from... where???
+
-	ld a, [$dcad]
+; If in map $00, load map group / map id from backup locations
+	ld a, [BackupMapGroup]
 	ld b, a
-	ld a, [$dcae]
+	ld a, [BackupMapNumber]
 	ld c, a
 	call GetWorldMapLocation
 .checkagain

wram.asm

@@ -56,6 +56,30 @@ BattleMonSpclAtk: ; c646
 BattleMonSpclDef: ; c648
 	ds 2
 
+SECTION "OtherTrainerClass",BSS[$d22f]
+
+OtherTrainerClass: ; 0xd22f
+; class (Youngster, Bug Catcher, etc.) of opposing trainer
+; 0 if opponent is a wild Pokémon, not a trainer
+	ds 1
+
+Wramd230: ; 0xd230
+; XXX what is this for
+	ds 1
+
+OtherTrainerID: ; 0xd231
+; which trainer of the class that you're fighting
+; (Joey, Mikey, Albert, etc.)
+	ds 1
+
+SECTION "Timeofday",BSS[$d269]
+
+TimeOfDay: ; 0xd269
+; 0 if morn
+; 1 if day
+; 2 if nite
+	ds 1
+
 SECTION "OtherTrainerParty",BSS[$d280]
 
 OTPartyMonHeader: ; d280
@@ -649,6 +673,15 @@ Box13Name: ; 0xdb31
 Box14Name: ; 0xdb3a
 	ds 9
 
+SECTION "BackupMapInfo", BSS[$dcad]
+
+; used on maps like second floor pokécenter, which are reused, so we know which
+; map to return to
+BackupMapGroup: ; 0xdcad
+	ds 1
+BackupMapNumber: ; 0xdcae
+	ds 1
+
 SECTION "PlayerMapInfo", BSS[$dcb4]
 
 WarpNumber: ; 0xdcb4