Links Awakening: Implement New Game (#1334)

Adds Link's Awakening: DX. Fully imports and forks LADXR, with permission - https://github.com/daid/LADXR
2025-10-21 20:21:32 -06:00 · 2023-03-21 01:26:03 +09:00
parent 67bf12369a
commit 81a239325d
180 changed files with 24191 additions and 2 deletions
--- a/worlds/ladx/LADXR/patches/shop.py
+++ b/worlds/ladx/LADXR/patches/shop.py
@@ -0,0 +1,152 @@
+from ..assembler import ASM
+
+
+def fixShop(rom):
+    # Move shield visuals to the 2nd slot, and arrow to 3th slot
+    rom.patch(0x04, 0x3732 + 22, "986A027FB2B098AC01BAB1", "9867027FB2B098A801BAB1")
+    rom.patch(0x04, 0x3732 + 55, "986302B1B07F98A4010A09", "986B02B1B07F98AC010A09")
+
+    # Just use a fixed location in memory to store which inventory we give.
+    rom.patch(0x04, 0x37C5, "0708", "0802")
+
+    # Patch the code that decides which shop to show.
+    rom.patch(0x04, 0x3839, 0x388E, ASM("""
+        push bc
+        jr skipSubRoutine
+
+checkInventory:
+        ld hl, $DB00 ; inventory
+        ld c, INV_SIZE
+loop:
+        cp [hl]
+        ret z
+        inc hl
+        dec c
+        jr nz, loop
+        and a
+        ret
+
+skipSubRoutine:
+        ; Set the shop table to all nothing.
+        ld   hl, $C505
+        xor  a
+        ldi  [hl], a
+        ldi  [hl], a
+        ldi  [hl], a
+        ldi  [hl], a
+        ld   de, $C505
+        
+        ; Check if we want to load a key item into the shop.
+        ldh  a, [$F8]
+        bit  4, a
+        jr   nz, checkForSecondKeyItem
+        ld   a, $01
+        ld   [de], a
+        jr   checkForShield
+checkForSecondKeyItem:
+        bit  5, a
+        jr   nz, checkForShield
+        ld   a, $05
+        ld   [de], a
+
+checkForShield:
+        inc  de
+        ; Check if we have the shield or the bow to see if we need to remove certain entries from the shop
+        ld   a, [$DB44]
+        and  a
+        jr   z, hasNoShieldLevel
+        ld   a, $03
+        ld   [de], a ; Add shield buy option
+hasNoShieldLevel:
+
+        inc  de
+        ld   a, $05
+        call checkInventory
+        jr   nz, hasNoBow
+        ld   a, $06
+        ld   [de], a ; Add arrow buy option
+hasNoBow:
+
+        inc  de
+        ld   a, $02
+        call checkInventory
+        jr   nz, hasNoBombs
+        ld   a, $04
+        ld   [de], a ; Add bomb buy option
+hasNoBombs:
+
+        pop  bc
+        call $3B12 ; increase entity state
+    """, 0x7839), fill_nop=True)
+
+    # We do not have enough room at the shovel/bow buy entry to handle this
+    # So jump to a bit where we have some more space to work, as there is some dead code in the shop.
+    rom.patch(0x04, 0x3AA9, 0x3AAE, ASM("jp $7AC3"), fill_nop=True)
+
+    # Patch over the "you stole it" dialog
+    rom.patch(0x00, 0x1A1C, 0x1A21, ASM("""ld   a, $C9
+       call   $2385"""), fill_nop=True)
+    rom.patch(0x04, 0x3AC3, 0x3AD8, ASM("""
+        ; No room override needed, we're in the proper room
+        ; Call our chest item giving code.
+        ld   a, $0E
+        rst  8
+        ; Update the room status to mark first item as bought
+        ld   hl, $DAA1
+        ld   a, [hl]
+        or   $10
+        ld   [hl], a
+        ret
+    """), fill_nop=True)
+    rom.patch(0x04, 0x3A73, 0x3A7E, ASM("jp $7A91"), fill_nop=True)
+    rom.patch(0x04, 0x3A91, 0x3AA9, ASM("""
+        ; Override the room - luckily nothing will go wrong here if we leave it as is
+        ld a, $A7
+        ldh  [$F6], a
+        ; Call our chest item giving code.
+        ld   a, $0E
+        rst  8
+        ; Update the room status to mark second item as bought
+        ld   hl, $DAA1
+        ld   a, [hl]
+        or   $20
+        ld   [hl], a
+        ret
+    """), fill_nop=True)
+
+    # Patch shop item graphics rendering to use some new code at the end of the bank.
+    rom.patch(0x04, 0x3B91, 0x3BAC, ASM("""
+        call $7FD0
+    """), fill_nop=True)
+    rom.patch(0x04, 0x3BD3, 0x3BE3, ASM("""
+        jp   $7FD0
+    """), fill_nop=True)
+    rom.patch(0x04, 0x3FD0, "00" * 42, ASM("""
+        ; Check if first key item
+        and  a
+        jr   nz, notShovel
+        ld   a, [$77C5]
+        ldh  [$F1], a
+        ld   a, $01
+        rst  8
+        ret
+notShovel:
+        cp   $04
+        jr   nz, notBow
+        ld   a, [$77C6]
+        ldh  [$F1], a
+        ld   a, $01
+        rst  8
+        ret
+notBow:
+        cp   $05
+        jr   nz, notArrows
+        ; Load arrow graphics and render then as a dual sprite
+        ld   de, $7B58
+        call $3BC0
+        ret
+notArrows:
+        ; Load the normal graphics
+        ld   de, $7B5A
+        jp   $3C77
+    """), fill_nop=True)