Links Awakening: Implement New Game (#1334)

Adds Link's Awakening: DX. Fully imports and forks LADXR, with permission - https://github.com/daid/LADXR

worlds/ladx/LADXR/patches/chest.py

@@ -0,0 +1,59 @@
+from ..assembler import ASM
+from ..utils import formatText
+from ..locations.constants import CHEST_ITEMS
+
+
+def fixChests(rom):
+    # Patch the chest code, so it can give a lvl1 sword.
+    # Normally, there is some code related to the owl event when getting the tail key,
+    # as we patched out the owl. We use it to jump to our custom code in bank $3E to handle getting the item
+    rom.patch(0x03, 0x109C, ASM("""
+        cp $11 ; if not tail key, skip
+        jr nz, end
+        push af
+        ld   a, [$C501]
+        ld   e, a
+        ld   hl, $C2F0
+        add  hl, de
+        ld   [hl], $38
+        pop af
+    end:
+        ld   e, a
+        cp   $21 ; if is message chest or higher number, next instruction is to skip giving things.
+    """), ASM("""
+        ld   a, $06 ; GiveItemMultiworld
+        rst  8
+
+        and  a   ; clear the carry flag to always skip giving stuff.
+    """), fill_nop=True)
+
+    # Instead of the normal logic to on which sprite data to show, we jump to our custom code in bank 3E.
+    rom.patch(0x07, 0x3C36, None, ASM("""
+        ld   a, $01
+        rst  8
+        jp $7C5E
+    """), fill_nop=True)
+
+    # Instead of the normal logic of showing the proper dialog, we jump to our custom code in bank 3E.
+    rom.patch(0x07, 0x3C9C, None, ASM("""
+        ld   a, $0A ; showItemMessageMultiworld
+        rst  8
+        jp $7CE9
+    """))
+
+    # Sound to play is normally loaded from a table, which is no longer big enough. So always use the same sound.
+    rom.patch(0x07, 0x3C81, ASM("""
+        add  hl, de
+        ld   a, [hl]
+    """), ASM("ld a, $01"), fill_nop=True)
+
+    # Always spawn seashells even if you have the L2 sword
+    rom.patch(0x14, 0x192F, ASM("ld a, $1C"), ASM("ld a, $20"))
+
+    rom.texts[0x9A] = formatText("You found 10 {BOMB}!")
+
+
+def setMultiChest(rom, option):
+    room = 0x2F2
+    addr = room + 0x560
+    rom.banks[0x14][addr] = CHEST_ITEMS[option]