Update Sprites and Items

- Add the Portal Rod item (WIP)
- Add Twinrova Boss Sprite
- Update the Minecart Sprite
- Fix the HUD magic meter draw
- Fix some Zora Mask bugs (WIP)
- General housekeeping

Overworld/custom_gfx.asm

@@ -0,0 +1,55 @@
+org $0AB917 ; after most of the area loading after calling the bird takes place
+    JSL CheckForChangeGraphicsNormalLoad
+
+org $028492 ; after leaving a dungeon
+    JSL CheckForChangeGraphicsNormalLoad
+
+org $00E19B
+    InitTilesets:
+
+; ==============================================================================
+
+org $3F8000
+CheckForChangeGraphicsNormalLoad:
+{
+  JSL InitTilesets ;calls $00E19B that was replaced
+  
+  LDA $8A : CMP.b #$30 : BNE .boat_area
+
+  PHB : PHK : PLB
+
+  JSR ApplyGraphics1
+  
+  PLB
+
+  RTL ;goes back to normal
+
+  .boat_area
+
+  RTL
+}
+
+; ==============================================================================
+
+ApplyGraphics1:
+{
+  REP #$20                      ; A = 16, XY = 8
+  LDX #$80 : STX $2115          ; Set the video port register every time we write it increase by 1
+  LDA #$2C00 : STA $2116        ; Destination of the DMA $5800 in vram <- this need to be divided by 2
+  LDA #$1801 : STA $4300        ; DMA Transfer Mode and destination register 
+                                ; "001 => 2 registers write once (2 bytes: p, p+1)"
+  LDA.w #BoatBitmap : STA $4302 ; Source address where you want gfx from ROM
+  LDX.b #BoatBitmap>>16 : STX $4304
+  LDA #$2000 : STA $4305        ; size of the transfer 4 sheets of $800 each
+  LDX #$01 : STX $420B          ; Do the DMA 
+
+  SEP #$30
+
+  RTS
+
+  BoatBitmap:
+  incbin gfx/boat.bin
+}
+
+; ==============================================================================
+

Overworld/maku_tree.asm

@@ -0,0 +1,16 @@
+
+org $0EDE29
+; $75E29-$75E48 DATA
+{
+    ; corresponding warp types that lead to special overworld areas
+    dw $01EF, $01E4, $00AD, $00B9
+    
+    ; Lost woods, Hyrule Castle Bridge, Entrance to Zora falls, and in Zora Falls...
+    dw $002A, $002D, $000F, $0081
+    
+    ; Direction Link will face when he enters the special area
+    dw $0008, $0002, $0008, $0008
+    
+    ; Exit value for the special area. In Hyrule Magic these are those White markers.
+    dw $0180, $0181, $0182, $0189
+}