document tile asm functions

asm/src/code_08003FC4.s

@@ -621,26 +621,26 @@ _0800439C: .4byte gSpritePtrs
 _080043A0: .4byte gSpritePtrs
 _080043A4: .4byte gGFXSlots+4
 
-	thumb_func_start sub_080043A8
-sub_080043A8: @ 0x080043A8
-	movs r1, #0xb
-	b _080043B6
+	thumb_func_start CreateDrownFX
+CreateDrownFX: @ 0x080043A8
+	movs r1, #0xb // FX_WATER_SPLASH
+	b create_fx
 
-	thumb_func_start CreateChestSpawner
-CreateChestSpawner: @ 0x080043AC
-	movs r1, #0xc
-	b _080043B6
+	thumb_func_start CreateLavaDrownFX
+CreateLavaDrownFX: @ 0x080043AC
+	movs r1, #0xc // FX_LAVA_SPLASH
+	b create_fx
 
-	thumb_func_start sub_080043B0
-sub_080043B0: @ 0x080043AC
-	movs r1, #0x52
-	b _080043B6
+	thumb_func_start CreateSwampDrownFX
+CreateSwampDrownFX: @ 0x080043AC
+	movs r1, #0x52 // FX_GREEN_SPLASH
+	b create_fx
 
-	thumb_func_start CreateItemOnGround
-CreateItemOnGround: @ 0x080043B4
-	movs r1, #0
+	thumb_func_start CreatePitFallFX
+CreatePitFallFX: @ 0x080043B4
+	movs r1, #0 // FX_FALL_DOWN
 
-_080043B6:
+create_fx:
 	push {r4, lr}
 	adds r4, r0, #0
 	movs r0, #0xf
@@ -648,10 +648,10 @@ _080043B6:
 	bl CreateObject
 
 	cmp r0, #0
-	beq _080043E0		@ Branch if entity could not be created
+	beq _080043E0
 
 	movs r1, #0x48
-	ldr r1, [r4, r1]	@ Unused?
+	ldr r1, [r4, r1] // load hitbox (unused)
 
 	ldrh r3, [r4, #0x2e]
 	strh r3, [r0, #0x2e]
@@ -664,11 +664,11 @@ _080043B6:
 
 	ldrb r3, [r4, #8]
 	
-	cmp r3, #3			@ Is the spawner an enemy?
+	cmp r3, #3 // is parent entity an enemy?
 	bne _080043E0
 	
 	movs r1, #1
-	strb r1, [r0, #0xb]	@ Set base parameter
+	strb r1, [r0, #0xb] // copy entity.type2
 
 _080043E0:
 	adds r0, r4, #0