From ddf99f789c2d39563343ef2eec74bb7ae13766cd Mon Sep 17 00:00:00 2001
From: goyuken <goyuken@4bbf4f03-6f44-549e-7e59-35d4b0962838>
Date: Sat, 29 Sep 2012 23:21:55 +0000
Subject: [PATCH] when attempting to load SGB, unset SGB config mode if we fail
 to load the bios file.  this avoids a catch-22 where you can't load an SGB
 because you don't have a rom, and you can't reset to GB mode because you
 can't get the menu item.

---
 BizHawk.MultiClient/MainForm.cs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/BizHawk.MultiClient/MainForm.cs b/BizHawk.MultiClient/MainForm.cs
index 4013b4a06e..486aee6677 100644
--- a/BizHawk.MultiClient/MainForm.cs
+++ b/BizHawk.MultiClient/MainForm.cs
@@ -1469,7 +1469,17 @@ namespace BizHawk.MultiClient
 								else
 								{
 									// todo: get these bioses into a gamedb??
-									byte[] sgbrom = File.ReadAllBytes(PathManager.MakeAbsolutePath(Global.Config.PathSGBRom, "SGB"));
+									byte[] sgbrom;
+									try
+									{
+										sgbrom = File.ReadAllBytes(PathManager.MakeAbsolutePath(Global.Config.PathSGBRom, "SGB"));
+									}
+									catch (Exception)
+									{
+										// failed to load SGB bios.  to avoid catch-22, disable SGB mode
+										Global.Config.GB_AsSGB = false;
+										throw;
+									}
 									game.AddOption("SGB");
 									game.System = "SGB";
 									var snes = new LibsnesCore();