1 files changed, 56 insertions, 0 deletions
diff --git a/engine/overworld.asm b/engine/overworld.asm
new file mode 100644
index 0000000..3f52f6e
--- /dev/null
+++ b/engine/overworld.asm
@@ -0,0 +1,56 @@
+INCLUDE "constants.asm"
+
+SECTION "Startmenu and Select Button Check", ROM0[$2C05]
+
+OverworldStartButtonCheck:: ; 2c05 (0:2c05)
+	ldh a, [hJoyState]
+	bit START_F, a
+	ret z
+	and (START | B_BUTTON)
+	cp (START | B_BUTTON)
+	jr nz, .regularMenu
+	ld a, [wce63]
+	bit 1, a
+	ret z              ; debug disabled
+	ld a, BANK(InGameDebugMenu)
+	ld hl, InGameDebugMenu
+	call FarCall_hl
+	jr CheckStartmenuSelectHook
+.regularMenu
+	ld a, BANK(DisplayStartMenu)
+	ld hl, DisplayStartMenu
+	call FarCall_hl
+	jr CheckStartmenuSelectHook
+SelectButtonFunction:: ; 2c2a (0:2c2a)
+	ld hl, CheckRegisteredItem
+	ld a, BANK(CheckRegisteredItem)
+	call FarCall_hl
+CheckStartmenuSelectHook:
+	ldh a, [hStartmenuCloseAndSelectHookEnable]
+	and a
+	ret z          ; hook is disabled
+	ld hl, StartmenuCloseAndSelectHookPtr
+	ld a, [hli]
+	ld h, [hl]
+	ld l, a
+	ld a, [StartmenuCloseAndSelectHookBank]
+	call FarCall_hl
+	ld hl, hStartmenuCloseAndSelectHookEnable
+	xor a
+	ld [hli], a    ; clear hook enable and ???
+	ld [hl], a
+	dec a
+	ret
+
+SECTION "Install StartMenu Hook Function", ROM0[$35EC]
+
+InstallStartmenuCloseAndSelectHook::
+; Install a function that is called as soon as
+; the start menu is closed or directly after
+; the select button function ran
+	ld [StartmenuCloseAndSelectHookBank], a
+	ld a, l
+	ld [StartmenuCloseAndSelectHookPtr], a
+	ld a, h
+	ld [StartmenuCloseAndSelectHookPtr + 1], a
+	ret