diff --git a/BizHawk.Emulation/Consoles/Atari/7800/Atari7800.cs b/BizHawk.Emulation/Consoles/Atari/7800/Atari7800.cs
index 1d7055c76b..fb3277e90b 100644
--- a/BizHawk.Emulation/Consoles/Atari/7800/Atari7800.cs
+++ b/BizHawk.Emulation/Consoles/Atari/7800/Atari7800.cs
@@ -202,7 +202,13 @@ namespace BizHawk.Emulation
 		{
 			cart = Cart.Create(rom, GameInfo.CartType);
 			ILogger logger = new ConsoleLogger();
-			HSC7800 hsc7800 = new HSC7800(hsbios, hsram);
+
+			HSC7800 hsc7800 = null;
+			if (hsbios != null)
+			{
+				hsc7800 = new HSC7800(hsbios, hsram);
+			}
+
 			Bios7800 bios7800 = new Bios7800(bios);
 			theMachine = MachineBase.Create
 				(GameInfo.MachineType,
@@ -260,25 +266,28 @@ namespace BizHawk.Emulation
 						delegate(int addr, byte val)
 						{
 						}));
-					_MemoryDomains.Add(new MemoryDomain(
-						"HSC ROM", hsbios.Length, Endian.Unknown,
-						delegate(int addr)
-						{
-							return hsbios[addr];
-						},
-						delegate(int addr, byte val)
-						{
-						}));
-					_MemoryDomains.Add(new MemoryDomain(
-						"HSC RAM", hsram.Length, Endian.Unknown,
-						delegate(int addr)
-						{
-							return hsram[addr];
-						},
-						delegate(int addr, byte val)
-						{
-							hsram[addr] = val;
-						}));
+					if (hsc7800 != null)
+					{
+						_MemoryDomains.Add(new MemoryDomain(
+							"HSC ROM", hsbios.Length, Endian.Unknown,
+							delegate(int addr)
+							{
+								return hsbios[addr];
+							},
+							delegate(int addr, byte val)
+							{
+							}));
+						_MemoryDomains.Add(new MemoryDomain(
+							"HSC RAM", hsram.Length, Endian.Unknown,
+							delegate(int addr)
+							{
+								return hsram[addr];
+							},
+							delegate(int addr, byte val)
+							{
+								hsram[addr] = val;
+							}));
+					}
 					_MemoryDomains.Add(new MemoryDomain(
 						"System Bus", 65536, Endian.Unknown,
 						delegate(int addr)
diff --git a/BizHawk.MultiClient/MainForm.cs b/BizHawk.MultiClient/MainForm.cs
index 28afd1d1f1..b3ad2974e6 100644
--- a/BizHawk.MultiClient/MainForm.cs
+++ b/BizHawk.MultiClient/MainForm.cs
@@ -2051,30 +2051,40 @@ namespace BizHawk.MultiClient
 								FileInfo palfile = new FileInfo(pal_biospath);
 								FileInfo hsfile = new FileInfo(hsbiospath);
 
+								byte[] NTSC_BIOS7800 = null;
+								byte[] PAL_BIOS7800 = null;
+								byte[] HighScoreBIOS = null;
 								if (!ntscfile.Exists)
 								{
-									MessageBox.Show("Unable to find the required Atari 7800 BIOS file - \n" + ntsc_biospath, "Unable to load BIOS", MessageBoxButtons.OK, MessageBoxIcon.Error);
-									throw new Exception();
+									MessageBox.Show("Unable to find the required Atari 7800 BIOS file - \n" + ntsc_biospath + "\nIf the selected game requires it, it may crash", "Unable to load BIOS", MessageBoxButtons.OK, MessageBoxIcon.Error);
+									//throw new Exception();
+								}
+								else
+								{
+									NTSC_BIOS7800 = File.ReadAllBytes(ntsc_biospath);
 								}
 
 								if (!palfile.Exists)
 								{
-									MessageBox.Show("Unable to find the required Atari 7800 BIOS file - \n" + pal_biospath, "Unable to load BIOS", MessageBoxButtons.OK, MessageBoxIcon.Error);
-									throw new Exception();
+									MessageBox.Show("Unable to find the required Atari 7800 BIOS file - \n" + pal_biospath + "\nIf the selected game requires it, it may crash", "Unable to load BIOS", MessageBoxButtons.OK, MessageBoxIcon.Error);
+									//throw new Exception();
+								}
+								else
+								{
+									PAL_BIOS7800 = File.ReadAllBytes(pal_biospath);
 								}
 
 								if (!hsfile.Exists)
 								{
-									MessageBox.Show("Unable to find the required Atari 7800 BIOS file - \n" + hsbiospath, "Unable to load BIOS", MessageBoxButtons.OK, MessageBoxIcon.Error);
-									throw new Exception();
+									MessageBox.Show("Unable to find the required Atari 7800 BIOS file - \n" + hsbiospath + "\nIf the selected game requires it, it may crash", "Unable to load BIOS", MessageBoxButtons.OK, MessageBoxIcon.Error);
+									//throw new Exception();
+								}
+								else
+								{
+									HighScoreBIOS = File.ReadAllBytes(hsbiospath);
 								}
 
-								byte[] NTSC_BIOS7800 = File.ReadAllBytes(ntsc_biospath);
-								byte[] PAL_BIOS7800 = File.ReadAllBytes(pal_biospath);
-								byte[] HighScoreBIOS = File.ReadAllBytes(hsbiospath);
-
 								string gamedbpath = Path.Combine(PathManager.GetExeDirectoryAbsolute(), "gamedb", "EMU7800.csv");
-
 								var a78 = new BizHawk.Emulation.Atari7800(nextComm, game, rom.RomData, NTSC_BIOS7800, PAL_BIOS7800, HighScoreBIOS, gamedbpath);
 								nextEmulator = a78;
 								break;