diff --git a/headers/data/overlay10.h b/headers/data/overlay10.h
index 3868a2b9..a79be937 100644
--- a/headers/data/overlay10.h
+++ b/headers/data/overlay10.h
@@ -93,7 +93,7 @@ extern int16_t WONDER_CHEST_EXP_BOOST;
 extern int16_t SPAWN_CAP_WITH_MONSTER_HOUSE;
 extern int16_t POISON_DAMAGE_COOLDOWN;
 extern int16_t LEECH_SEED_DAMAGE_COOLDOWN;
-extern int16_t ITEM_HIT_CHANCE;
+extern int16_t THROWN_ITEM_HIT_CHANCE;
 extern int16_t GEO_PEBBLE_DAMAGE;
 extern int16_t GRAVELEROCK_DAMAGE;
 extern int16_t RARE_FOSSIL_DAMAGE;
diff --git a/symbols/arm7.yml b/symbols/arm7.yml
index 6d839808..f0cf46bf 100644
--- a/symbols/arm7.yml
+++ b/symbols/arm7.yml
@@ -70,6 +70,8 @@ arm7:
         No params.
     - name: HardwareInterrupt
       address:
+        EU: 0x2383670
+        NA: 0x2383670
         EU-WRAM: 0x37FB488
         NA-WRAM: 0x37FB488
       description: |-
@@ -82,6 +84,8 @@ arm7:
         No params.
     - name: ReturnFromInterrupt
       address:
+        EU: 0x23836DC
+        NA: 0x23836DC
         EU-WRAM: 0x37FB4F4
         NA-WRAM: 0x37FB4F4
       description: |-
@@ -90,6 +94,8 @@ arm7:
         No params.
     - name: AudioInterrupt
       address:
+        EU: 0x2383824
+        NA: 0x2383824
         EU-WRAM: 0x37FB63C
         NA-WRAM: 0x37FB63C
       description: |-
@@ -100,6 +106,8 @@ arm7:
         r0: Index of the function to jump to
     - name: ClearImeFlag
       address:
+        EU: 0x2383AC0
+        NA: 0x2383AC0
         EU-WRAM: 0x37FB8D8
         NA-WRAM: 0x37FB8D8
       description: |-
@@ -108,6 +116,8 @@ arm7:
         return: Previous IME value
     - name: ClearIeFlag
       address:
+        EU: 0x2383B10
+        NA: 0x2383B10
         EU-WRAM: 0x37FB928
         NA-WRAM: 0x37FB928
       description: |-
@@ -117,6 +127,8 @@ arm7:
         return: Previous value of the Interrupt Enable flags
     - name: GetCurrentPlaybackTime
       address:
+        EU: 0x2385404
+        NA: 0x2385404
         EU-WRAM: 0x37FD21C
         NA-WRAM: 0x37FD21C
       description: |-
@@ -125,6 +137,8 @@ arm7:
         The time is obtained using a couple of RAM counters and the hardware timers for additional precision.
         The game uses this value to know when a given note should stop being played. It doesn't seem to be used to keep track of the
         current time instant within the song.
+        
+        return: Playback time. Units unknown.
     - name: ClearIrqFlag
       address:
         EU: 0x2385ED4
diff --git a/symbols/arm9/itcm.yml b/symbols/arm9/itcm.yml
index fd70dd5e..dfd5f89e 100644
--- a/symbols/arm9/itcm.yml
+++ b/symbols/arm9/itcm.yml
@@ -264,6 +264,8 @@ itcm:
         return: key
     - name: HardwareInterrupt
       address:
+        EU: 0x20B52A8
+        NA: 0x20B4968
         EU-ITCM: 0x1FF95E8
         NA-ITCM: 0x1FF95E8
       description: |-
@@ -277,6 +279,8 @@ itcm:
         No params.
     - name: ReturnFromInterrupt
       address:
+        EU: 0x20B5310
+        NA: 0x20B49D0
         EU-ITCM: 0x1FF9650
         NA-ITCM: 0x1FF9650
       description: |-
diff --git a/symbols/overlay10.yml b/symbols/overlay10.yml
index d1e3c99a..526775cd 100644
--- a/symbols/overlay10.yml
+++ b/symbols/overlay10.yml
@@ -934,7 +934,7 @@ overlay10:
       length:
         NA: 0x2
       description: The number of turns between leech seed health drain.
-    - name: ITEM_HIT_CHANCE
+    - name: THROWN_ITEM_HIT_CHANCE
       address:
         EU: 0x22C5008
         NA: 0x22C46B0
diff --git a/symbols/overlay29.yml b/symbols/overlay29.yml
index 59852428..0f22c25e 100644
--- a/symbols/overlay29.yml
+++ b/symbols/overlay29.yml
@@ -7554,7 +7554,7 @@ overlay29:
       description: |-
         Determines if a hurled projectile will impact on a target or if the target will dodge it instead.
         
-        Contains a random chance using ITEM_HIT_CHANCE, as well as some additional checks involving certain items (Whiff Specs, Lockon Specs and Dodge Scarf), exclusive item effects (EXCLUSIVE_EFF_THROWN_ITEM_PROTECTION) or pokémon (Kecleon, clients, secret bazaar NPCs).
+        Contains a random chance using THROWN_ITEM_HIT_CHANCE, as well as some additional checks involving certain items (Whiff Specs, Lockon Specs and Dodge Scarf), exclusive item effects (EXCLUSIVE_EFF_THROWN_ITEM_PROTECTION) or pokémon (Kecleon, clients, secret bazaar NPCs).
         
         r0: Monster that throws the item
         r1: Target monster