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/endscreen.py

@@ -0,0 +1,139 @@
+from ..assembler import ASM
+import os
+
+
+def updateEndScreen(rom):
+    # Call our custom data loader in bank 3F
+    rom.patch(0x00, 0x391D, ASM("""
+        ld   a, $20
+        ld   [$2100], a
+        jp   $7de6
+    """), ASM("""
+        ld   a, $3F
+        ld   [$2100], a
+        jp   $4200
+    """))
+    rom.patch(0x17, 0x2FCE, "B170", "D070") # Ignore the final tile data load
+    
+    rom.patch(0x3F, 0x0200, None, ASM("""
+    ; Disable LCD
+    xor a
+    ldh  [$40], a
+    
+    ld  hl, $8000
+    ld  de, $5000
+copyLoop:
+    ld  a, [de]
+    inc de
+    ldi [hl], a
+    bit 4, h
+    jr  z, copyLoop
+
+    ld  a, $01
+    ldh [$4F], a
+
+    ld  hl, $8000
+    ld  de, $6000
+copyLoop2:
+    ld  a, [de]
+    inc de
+    ldi [hl], a
+    bit 4, h
+    jr  z, copyLoop2
+
+    ld  hl, $9800
+    ld  de, $0190
+clearLoop1:
+    xor a
+    ldi [hl], a
+    dec de
+    ld  a, d
+    or  e
+    jr  nz, clearLoop1
+
+    ld  de, $0190
+clearLoop2:
+    ld  a, $08
+    ldi [hl], a
+    dec de
+    ld  a, d
+    or  e
+    jr  nz, clearLoop2
+
+    xor  a
+    ldh  [$4F], a
+
+
+    ld  hl, $9800
+    ld  de, $000C
+    xor  a
+loadLoop1:
+    ldi  [hl], a
+    ld   b, a
+    ld   a, l
+    and  $1F
+    cp   $14
+    jr   c, .noLineSkip
+    add  hl, de
+.noLineSkip:
+    ld   a, b
+    inc  a
+    jr   nz, loadLoop1
+
+loadLoop2:
+    ldi  [hl], a
+    ld   b, a
+    ld   a, l
+    and  $1F
+    cp   $14
+    jr   c, .noLineSkip
+    add  hl, de
+.noLineSkip:
+    ld   a, b
+    inc  a
+    jr   nz, loadLoop2
+
+    ; Load palette
+    ld   hl, $DC10
+    ld   a, $00
+    ldi  [hl], a
+    ld   a, $00
+    ldi  [hl], a
+
+    ld   a, $ad
+    ldi  [hl], a
+    ld   a, $35
+    ldi  [hl], a
+
+    ld   a, $94
+    ldi  [hl], a
+    ld   a, $52
+    ldi  [hl], a
+
+    ld   a, $FF
+    ldi  [hl], a
+    ld   a, $7F
+    ldi  [hl], a
+
+    ld   a, $00
+    ld   [$DDD3], a
+    ld   a, $04
+    ld   [$DDD4], a
+    ld   a, $81
+    ld   [$DDD1], a
+
+    ; Enable LCD
+    ld  a, $91
+    ldh [$40], a
+    ld  [$d6fd], a
+    
+    xor a
+    ldh [$96], a
+    ldh [$97], a
+    ret
+    """))
+    
+    addr = 0x1000
+    for c in open(os.path.join(os.path.dirname(__file__), "nyan.bin"), "rb").read():
+        rom.banks[0x3F][addr] = c
+        addr += 1