Use labels instead of constants for HRAM

Use explicit ldh instruction to access HRAM locations, don't rely on optimizing ld

home/window.asm

@@ -1,6 +1,6 @@
 RefreshScreen::
 	call ClearWindowData
-	ld a, [hROMBank]
+	ldh a, [hROMBank]
 	push af
 	ld a, BANK(ReanchorBGMap_NoOAMUpdate) ; and BANK(LoadFonts_NoOAMUpdate)
 	rst Bankswitch
@@ -14,15 +14,15 @@ RefreshScreen::
 	ret
 
 CloseText::
-	ld a, [hOAMUpdate]
+	ldh a, [hOAMUpdate]
 	push af
 	ld a, $1
-	ld [hOAMUpdate], a
+	ldh [hOAMUpdate], a
 
 	call .CloseText
 
 	pop af
-	ld [hOAMUpdate], a
+	ldh [hOAMUpdate], a
 	ld hl, wVramState
 	res 6, [hl]
 	ret
@@ -30,14 +30,14 @@ CloseText::
 .CloseText:
 	call ClearWindowData
 	xor a
-	ld [hBGMapMode], a
+	ldh [hBGMapMode], a
 	call OverworldTextModeSwitch
 	call _OpenAndCloseMenu_HDMATransferTileMapAndAttrMap
 	xor a
-	ld [hBGMapMode], a
+	ldh [hBGMapMode], a
 	call SafeUpdateSprites
 	ld a, $90
-	ld [hWY], a
+	ldh [hWY], a
 	call ReplaceKrisSprite
 	farcall ReturnFromMapSetupScript
 	farcall LoadOverworldFont
@@ -45,7 +45,7 @@ CloseText::
 
 OpenText::
 	call ClearWindowData
-	ld a, [hROMBank]
+	ldh a, [hROMBank]
 	push af
 	ld a, BANK(ReanchorBGMap_NoOAMUpdate) ; and BANK(LoadFonts_NoOAMUpdate)
 	rst Bankswitch
@@ -60,36 +60,36 @@ OpenText::
 	ret
 
 _OpenAndCloseMenu_HDMATransferTileMapAndAttrMap::
-	ld a, [hOAMUpdate]
+	ldh a, [hOAMUpdate]
 	push af
 	ld a, $1
-	ld [hOAMUpdate], a
+	ldh [hOAMUpdate], a
 
 	farcall OpenAndCloseMenu_HDMATransferTileMapAndAttrMap
 
 	pop af
-	ld [hOAMUpdate], a
+	ldh [hOAMUpdate], a
 	ret
 
 SafeUpdateSprites::
-	ld a, [hOAMUpdate]
+	ldh a, [hOAMUpdate]
 	push af
-	ld a, [hBGMapMode]
+	ldh a, [hBGMapMode]
 	push af
 	xor a
-	ld [hBGMapMode], a
+	ldh [hBGMapMode], a
 	ld a, $1
-	ld [hOAMUpdate], a
+	ldh [hOAMUpdate], a
 
 	call UpdateSprites
 
 	xor a
-	ld [hOAMUpdate], a
+	ldh [hOAMUpdate], a
 	call DelayFrame
 	pop af
-	ld [hBGMapMode], a
+	ldh [hBGMapMode], a
 	pop af
-	ld [hOAMUpdate], a
+	ldh [hOAMUpdate], a
 	ret
 
 ; unused