From 5ee9997ea06ad3ada47cd9fcb6a9293acdcba883 Mon Sep 17 00:00:00 2001
From: sanni <sanni@users.noreply.github.com>
Date: Thu, 10 Dec 2020 12:04:25 +0100
Subject: [PATCH] Fix Megadrive Zero Wing (J)

thx to tamanegi_taro
---
 Cart_Reader/MD.ino | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Cart_Reader/MD.ino b/Cart_Reader/MD.ino
index a76536c..28a6c5f 100644
--- a/Cart_Reader/MD.ino
+++ b/Cart_Reader/MD.ino
@@ -607,6 +607,16 @@ void getCartInfo_MD() {
   // Cart Checksum
   chksum = readWord_MD(0xC7);
 
+  // Zero Wing Check
+  if (cartSize == 0x80000) {
+    switch (chksum) {
+      case 0xD07D: //Zero Wing (J) 8Mbit
+        cartSize = 0x100000; //1MB instead of 512KB
+        chksum = 0xF204;
+        break;
+    }
+  }
+
   // Super Street Fighter 2 Check
   if (cartSize == 0x400000) {
     switch (chksum) {