various minor additions

-battle variable constants
-step counters
-turn update fns

constants.asm

@@ -3249,6 +3249,8 @@ MUSIC_SUICUNE_BATTLE EQU 100
 MUSIC_BATTLE_TOWER_LOBBY EQU 101
 MUSIC_MOBILE_CENTER EQU 102
 
+MUSIC_MAHOGANY_MART EQU 100 ; grandfathered from gold
+
 ; sound
 _4CH1 EQU $c0
 _3CH1 EQU $80
@@ -3416,6 +3418,30 @@ BATTLETYPE_FORCEITEM EQU $0a
 BATTLETYPE_SUICUNE EQU $0c
 
 
+; battle variables
+BATTLE_VARS_SUBSTATUS1 EQU 0
+BATTLE_VARS_SUBSTATUS2 EQU 1
+BATTLE_VARS_SUBSTATUS3 EQU 2
+BATTLE_VARS_SUBSTATUS4 EQU 3
+BATTLE_VARS_SUBSTATUS5 EQU 4
+BATTLE_VARS_SUBSTATUS1_OPP EQU 5
+BATTLE_VARS_SUBSTATUS2_OPP EQU 6
+BATTLE_VARS_SUBSTATUS3_OPP EQU 7
+BATTLE_VARS_SUBSTATUS4_OPP EQU 8
+BATTLE_VARS_SUBSTATUS5_OPP EQU 9
+BATTLE_VARS_STATUS EQU 10
+BATTLE_VARS_STATUS_OPP EQU 11
+BATTLE_VARS_MOVE_ANIM EQU 12
+BATTLE_VARS_MOVE_EFFECT EQU 13
+BATTLE_VARS_MOVE_POWER EQU 14
+BATTLE_VARS_MOVE_TYPE EQU 15
+BATTLE_VARS_MOVE EQU 16
+BATTLE_VARS_LAST_COUNTER_MOVE EQU 17
+BATTLE_VARS_LAST_COUNTER_MOVE_OPP EQU 18
+BATTLE_VARS_LAST_MOVE EQU 19
+BATTLE_VARS_LAST_MOVE_OPP EQU 20
+
+
 ; joypad
 BUTTONS    EQU %00010000
 D_PAD      EQU %00100000