1 files changed, 54 insertions, 0 deletions
diff --git a/home/npc_movement.asm b/home/npc_movement.asm
new file mode 100644
index 00000000..4914d3df
--- /dev/null
+++ b/home/npc_movement.asm
@@ -0,0 +1,54 @@
+; not zero if an NPC movement script is running, the player character is
+; automatically stepping down from a door, or joypad states are being simulated
+IsPlayerCharacterBeingControlledByGame::
+	ld a, [wNPCMovementScriptPointerTableNum]
+	and a
+	ret nz
+	ld a, [wd736]
+	bit 1, a ; currently stepping down from door bit
+	ret nz
+	ld a, [wd730]
+	and $80
+	ret
+
+RunNPCMovementScript::
+	ld hl, wd736
+	bit 0, [hl]
+	res 0, [hl]
+	jr nz, .playerStepOutFromDoor
+	ld a, [wNPCMovementScriptPointerTableNum]
+	and a
+	ret z
+	dec a
+	add a
+	ld d, 0
+	ld e, a
+	ld hl, .NPCMovementScriptPointerTables
+	add hl, de
+	ld a, [hli]
+	ld h, [hl]
+	ld l, a
+	ldh a, [hLoadedROMBank]
+	push af
+	ld a, [wNPCMovementScriptBank]
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	ld a, [wNPCMovementScriptFunctionNum]
+	call CallFunctionInTable
+	pop af
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	ret
+
+.NPCMovementScriptPointerTables
+	dw PalletMovementScriptPointerTable
+	dw PewterMuseumGuyMovementScriptPointerTable
+	dw PewterGymGuyMovementScriptPointerTable
+.playerStepOutFromDoor
+	farjp PlayerStepOutFromDoor
+
+EndNPCMovementScript::
+	farjp _EndNPCMovementScript
+
+EmptyFunc2::
+	ret