took drnach's dmg association and expanded on it :)

looks like the branch doesn't have properties assigned

src/gb/GB.cpp

@@ -21,6 +21,7 @@
 
 extern u8 *pix;
 extern bool speedup;
+bool gbUpdateSizes();
 bool inBios = false;
 
 // debugging
@@ -608,10 +609,10 @@ bool gbIsGameboyRom(char * file)
     char * p = strrchr(file,'.');
 
     if(p != NULL) {
-      if(_stricmp(p, ".dmg") == 0)
-        return true;
       if(_stricmp(p, ".gb") == 0)
         return true;
+      if(_stricmp(p, ".dmg") == 0)
+        return true;
       if(_stricmp(p, ".gbc") == 0)
         return true;
       if(_stricmp(p, ".cgb") == 0)

src/win32/Associate.cpp

@@ -36,7 +36,7 @@ void Associate::DoDataExchange(CDataExchange* pDX)
   DDX_Check(pDX, IDC_AGB, m_agb);
   DDX_Check(pDX, IDC_BIN, m_bin);
   DDX_Check(pDX, IDC_CGB, m_cgb);
-  DDX_Check(pDX, IDC_GB, m_dmg);
+  DDX_Check(pDX, IDC_DMG, m_dmg);
   DDX_Check(pDX, IDC_GB, m_gb);
   DDX_Check(pDX, IDC_GBA, m_gba);
   DDX_Check(pDX, IDC_GBC, m_gbc);
@@ -50,7 +50,7 @@ BEGIN_MESSAGE_MAP(Associate, CDialog)
   ON_BN_CLICKED(ID_CANCEL, OnCancel)
   ON_BN_CLICKED(ID_OK, OnOk)
   //}}AFX_MSG_MAP
-  END_MESSAGE_MAP()
+END_MESSAGE_MAP()
 
   /////////////////////////////////////////////////////////////////////////////
 // Associate message handlers
@@ -75,9 +75,9 @@ void Associate::OnOk()
   UpdateData();
 
   int mask = 0;
-  if(m_dmg)
-    mask |= 1;
   if(m_gb)
+    mask |= 1;
+  if(m_dmg)
     mask |= 2;
   if(m_sgb)
     mask |= 4;

src/win32/Associate.h

@@ -47,7 +47,7 @@ class Associate : public CDialog
   afx_msg void OnOk();
   //}}AFX_MSG
   DECLARE_MESSAGE_MAP()
-    };
+};
 
     //{{AFX_INSERT_LOCATION}}
     // Microsoft Visual C++ will insert additional declarations immediately before the previous line.

src/win32/resource.h

@@ -288,6 +288,7 @@
 #define IDC_GBC                         1081
 #define IDC_ROM_MAKER_CODE              1081
 #define IDS_CODE                        1081
+#define IDC_DMG                         1082
 #define IDC_ROM_UNIT_CODE               1082
 #define IDS_DESCRIPTION                 1082
 #define IDC_ROM_DEVICE_TYPE             1083