diff --git a/BizHawk.Client.Common/FirmwareManager.cs b/BizHawk.Client.Common/FirmwareManager.cs
index 531e0fbd67..548b0512fc 100644
--- a/BizHawk.Client.Common/FirmwareManager.cs
+++ b/BizHawk.Client.Common/FirmwareManager.cs
@@ -6,9 +6,6 @@ using System.Linq;
 using BizHawk.Common.BufferExtensions;
 using BizHawk.Emulation.Common;
 
-// IDEA: put filesizes in DB too. then scans can go real quick by only scanning filesizes that match (and then scanning filesizes that dont match, in case of an emergency)
-// this would be adviseable if we end up with a very large firmware file
-
 namespace BizHawk.Client.Common
 {
 	public class FirmwareManager
@@ -28,6 +25,7 @@ namespace BizHawk.Client.Common
 			public FirmwareDatabase.FirmwareFile KnownFirmwareFile { get; set; }
 			public string FilePath { get; set; }
 			public string Hash { get; set; }
+			public long Size { get; set; }
 		}
 
 		private readonly Dictionary<FirmwareDatabase.FirmwareRecord, ResolutionInfo> _resolutionDictionary = new Dictionary<FirmwareDatabase.FirmwareRecord, ResolutionInfo>();
@@ -98,6 +96,11 @@ namespace BizHawk.Client.Common
 
 		public void DoScanAndResolve()
 		{
+			//build a list of file sizes. Only those will be checked during scanning
+			HashSet<long> sizes = new HashSet<long>();
+			foreach (var ff in FirmwareDatabase.FirmwareFiles)
+				sizes.Add(ff.size);
+
 			using(var reader = new RealFirmwareReader())
 			{
 				// build a list of files under the global firmwares path, and build a hash for each of them while we're at it
@@ -119,7 +122,8 @@ namespace BizHawk.Client.Common
 				
 					foreach (var fi in di.GetFiles())
 					{
-						reader.Read(fi);
+						if(sizes.Contains(fi.Length))
+							reader.Read(fi);
 					}
 				}
 
@@ -149,7 +153,8 @@ namespace BizHawk.Client.Common
 								{
 									FilePath = reader.dict[hash].FileInfo.FullName,
 									KnownFirmwareFile = FirmwareDatabase.FirmwareFilesByHash[hash],
-									Hash = hash
+									Hash = hash,
+									Size = fo.size
 								};
 							_resolutionDictionary[fr] = ri;
 							goto DONE_FIRMWARE;
@@ -190,6 +195,7 @@ namespace BizHawk.Client.Common
 
 						// compute its hash 
 						var rff = reader.Read(fi);
+						ri.Size = fi.Length;
 						ri.Hash = rff.Hash;
 
 						// check whether it was a known file anyway, and go ahead and bind to the known file, as a perk (the firmwares config doesnt really use this information right now)
diff --git a/BizHawk.Client.EmuHawk/config/FirmwaresConfig.Designer.cs b/BizHawk.Client.EmuHawk/config/FirmwaresConfig.Designer.cs
index 7f36f58c00..a8ace83503 100644
--- a/BizHawk.Client.EmuHawk/config/FirmwaresConfig.Designer.cs
+++ b/BizHawk.Client.EmuHawk/config/FirmwaresConfig.Designer.cs
@@ -56,6 +56,7 @@
 			this.linkBasePath = new System.Windows.Forms.LinkLabel();
 			this.label1 = new System.Windows.Forms.Label();
 			this.toolTip1 = new System.Windows.Forms.ToolTip(this.components);
+			this.columnHeader8 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
 			this.lvFirmwaresContextMenuStrip.SuspendLayout();
 			this.panel1.SuspendLayout();
 			this.toolStrip1.SuspendLayout();
@@ -79,6 +80,7 @@
             this.columnHeader4,
             this.columnHeader2,
             this.columnHeader3,
+            this.columnHeader8,
             this.columnHeader7});
 			this.lvFirmwares.ContextMenuStrip = this.lvFirmwaresContextMenuStrip;
 			this.lvFirmwares.Dock = System.Windows.Forms.DockStyle.Fill;
@@ -86,7 +88,7 @@
 			this.lvFirmwares.GridLines = true;
 			this.lvFirmwares.Location = new System.Drawing.Point(0, 25);
 			this.lvFirmwares.Name = "lvFirmwares";
-			this.lvFirmwares.Size = new System.Drawing.Size(773, 424);
+			this.lvFirmwares.Size = new System.Drawing.Size(824, 424);
 			this.lvFirmwares.SmallImageList = this.imageList1;
 			this.lvFirmwares.TabIndex = 24;
 			this.lvFirmwares.UseCompatibleStateImageBehavior = false;
@@ -128,7 +130,7 @@
 			// columnHeader7
 			// 
 			this.columnHeader7.Text = "Hash";
-			this.columnHeader7.Width = 340;
+			this.columnHeader7.Width = 250;
 			// 
 			// lvFirmwaresContextMenuStrip
 			// 
@@ -176,7 +178,7 @@
 			this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
 			this.panel1.Location = new System.Drawing.Point(3, 3);
 			this.panel1.Name = "panel1";
-			this.panel1.Size = new System.Drawing.Size(773, 449);
+			this.panel1.Size = new System.Drawing.Size(824, 449);
 			this.panel1.TabIndex = 24;
 			// 
 			// toolStrip1
@@ -190,7 +192,7 @@
             this.tbbImport});
 			this.toolStrip1.Location = new System.Drawing.Point(0, 0);
 			this.toolStrip1.Name = "toolStrip1";
-			this.toolStrip1.Size = new System.Drawing.Size(773, 25);
+			this.toolStrip1.Size = new System.Drawing.Size(824, 25);
 			this.toolStrip1.TabIndex = 23;
 			this.toolStrip1.Text = "toolStrip1";
 			// 
@@ -254,7 +256,7 @@
 			this.tableLayoutPanel1.RowCount = 2;
 			this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 100F));
 			this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
-			this.tableLayoutPanel1.Size = new System.Drawing.Size(779, 478);
+			this.tableLayoutPanel1.Size = new System.Drawing.Size(830, 478);
 			this.tableLayoutPanel1.TabIndex = 25;
 			// 
 			// panel2
@@ -267,7 +269,7 @@
 			this.panel2.Dock = System.Windows.Forms.DockStyle.Fill;
 			this.panel2.Location = new System.Drawing.Point(3, 458);
 			this.panel2.Name = "panel2";
-			this.panel2.Size = new System.Drawing.Size(773, 17);
+			this.panel2.Size = new System.Drawing.Size(824, 17);
 			this.panel2.TabIndex = 26;
 			// 
 			// linkBasePath
@@ -290,11 +292,15 @@
 			this.label1.TabIndex = 25;
 			this.label1.Text = "Firmwares Search Path:";
 			// 
+			// columnHeader8
+			// 
+			this.columnHeader8.Text = "Size";
+			// 
 			// FirmwaresConfig
 			// 
 			this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
 			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-			this.ClientSize = new System.Drawing.Size(779, 478);
+			this.ClientSize = new System.Drawing.Size(830, 478);
 			this.Controls.Add(this.tableLayoutPanel1);
 			this.Name = "FirmwaresConfig";
 			this.ShowIcon = false;
@@ -343,5 +349,6 @@
 				private System.Windows.Forms.LinkLabel linkBasePath;
 				private System.Windows.Forms.Label label1;
 				private System.Windows.Forms.ToolStripButton tbbImport;
+				private System.Windows.Forms.ColumnHeader columnHeader8;
     }
 }
\ No newline at end of file
diff --git a/BizHawk.Client.EmuHawk/config/FirmwaresConfig.cs b/BizHawk.Client.EmuHawk/config/FirmwaresConfig.cs
index 0f60ce6f65..25a8da7371 100644
--- a/BizHawk.Client.EmuHawk/config/FirmwaresConfig.cs
+++ b/BizHawk.Client.EmuHawk/config/FirmwaresConfig.cs
@@ -124,8 +124,10 @@ namespace BizHawk.Client.EmuHawk
 				lvi.SubItems.Add(fr.descr);
 				lvi.SubItems.Add(""); //resolved with
 				lvi.SubItems.Add(""); //location
+				lvi.SubItems.Add(""); //size
 				lvi.SubItems.Add(""); //hash
-				lvi.SubItems[6].Font = fixedFont; //would be used for hash
+				lvi.SubItems[6].Font = fixedFont; //would be used for hash and size
+				lvi.SubItems[7].Font = fixedFont; //would be used for hash and size
 				lvFirmwares.Items.Add(lvi);
 
 				//build the groups in the listview as we go:
@@ -198,7 +200,7 @@ namespace BizHawk.Client.EmuHawk
 			{
 				var fr = lvi.Tag as FirmwareDatabase.FirmwareRecord;
 				var ri = Manager.Resolve(fr, true);
-				for(int i=4;i<=6;i++)
+				for(int i=4;i<=7;i++)
 					lvi.SubItems[i].Text = "";
 
 				if (ri == null)
@@ -248,8 +250,11 @@ namespace BizHawk.Client.EmuHawk
 						lvi.ImageIndex = idUnsure;
 
 					lvi.SubItems[5].Text = path;
-					if (ri.Hash != null) lvi.SubItems[6].Text = "sha1:" + ri.Hash;
-					else lvi.SubItems[6].Text = "";
+
+					lvi.SubItems[6].Text = ri.Size.ToString();
+
+					if (ri.Hash != null) lvi.SubItems[7].Text = "sha1:" + ri.Hash;
+					else lvi.SubItems[7].Text = "";
 				}
 			}
 
@@ -362,6 +367,7 @@ namespace BizHawk.Client.EmuHawk
 				olvi.SubItems.Add(new ListViewItem.ListViewSubItem());
 				olvi.SubItems.Add(new ListViewItem.ListViewSubItem());
 				olvi.SubItems.Add(new ListViewItem.ListViewSubItem());
+				olvi.SubItems.Add(new ListViewItem.ListViewSubItem());
 				var ff = FirmwareDatabase.FirmwareFilesByHash[o.hash];
 				if (o.status == FirmwareDatabase.FirmwareOptionStatus.Ideal)
 					olvi.ImageIndex = FirmwaresConfigInfo.idIdeal;
@@ -371,14 +377,16 @@ namespace BizHawk.Client.EmuHawk
 					olvi.ImageIndex = FirmwaresConfigInfo.idUnacceptable;
 				if (o.status == FirmwareDatabase.FirmwareOptionStatus.Bad)
 					olvi.ImageIndex = FirmwaresConfigInfo.idBad;
-				olvi.SubItems[0].Text = o.hash;
-				olvi.SubItems[0].Font = fixedFont;
-				olvi.SubItems[1].Text = ff.recommendedName;
-				olvi.SubItems[1].Font = this.Font; //why doesnt this work?
-				olvi.SubItems[2].Text = ff.descr;
+				olvi.SubItems[0].Text = ff.size.ToString();
+				olvi.SubItems[0].Font = this.Font; //why doesnt this work?
+				olvi.SubItems[1].Text = o.hash;
+				olvi.SubItems[1].Font = fixedFont;
+				olvi.SubItems[2].Text = ff.recommendedName;
 				olvi.SubItems[2].Font = this.Font; //why doesnt this work?
-				olvi.SubItems[3].Text = ff.info;
+				olvi.SubItems[3].Text = ff.descr;
 				olvi.SubItems[3].Font = this.Font; //why doesnt this work?
+				olvi.SubItems[4].Text = ff.info;
+				olvi.SubItems[4].Font = this.Font; //why doesnt this work?
 				fciDialog.lvOptions.Items.Add(olvi);
 			}
 
diff --git a/BizHawk.Client.EmuHawk/config/FirmwaresConfigInfo.Designer.cs b/BizHawk.Client.EmuHawk/config/FirmwaresConfigInfo.Designer.cs
index 31bc64c848..b501f82d2e 100644
--- a/BizHawk.Client.EmuHawk/config/FirmwaresConfigInfo.Designer.cs
+++ b/BizHawk.Client.EmuHawk/config/FirmwaresConfigInfo.Designer.cs
@@ -34,6 +34,7 @@
 			this.colStandardFilename = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
 			this.colDescription = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
 			this.colInfo = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
+			this.imageList1 = new System.Windows.Forms.ImageList(this.components);
 			this.tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
 			this.label1 = new System.Windows.Forms.Label();
 			this.btnClose = new System.Windows.Forms.Button();
@@ -42,7 +43,7 @@
 			this.lblFirmware = new System.Windows.Forms.Label();
 			this.lvmiOptionsContextMenuStrip = new System.Windows.Forms.ContextMenuStrip(this.components);
 			this.tsmiOptionsCopy = new System.Windows.Forms.ToolStripMenuItem();
-			this.imageList1 = new System.Windows.Forms.ImageList(this.components);
+			this.colSize = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
 			this.tableLayoutPanel1.SuspendLayout();
 			this.flowLayoutPanel1.SuspendLayout();
 			this.lvmiOptionsContextMenuStrip.SuspendLayout();
@@ -51,6 +52,7 @@
 			// lvOptions
 			// 
 			this.lvOptions.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
+            this.colSize,
             this.colHash,
             this.colStandardFilename,
             this.colDescription,
@@ -88,6 +90,12 @@
 			this.colInfo.Text = "Info";
 			this.colInfo.Width = 165;
 			// 
+			// imageList1
+			// 
+			this.imageList1.ColorDepth = System.Windows.Forms.ColorDepth.Depth8Bit;
+			this.imageList1.ImageSize = new System.Drawing.Size(16, 16);
+			this.imageList1.TransparentColor = System.Drawing.Color.Transparent;
+			// 
 			// tableLayoutPanel1
 			// 
 			this.tableLayoutPanel1.ColumnCount = 1;
@@ -173,11 +181,10 @@
 			this.tsmiOptionsCopy.Text = "&Copy";
 			this.tsmiOptionsCopy.Click += new System.EventHandler(this.tsmiOptionsCopy_Click);
 			// 
-			// imageList1
+			// colSize
 			// 
-			this.imageList1.ColorDepth = System.Windows.Forms.ColorDepth.Depth8Bit;
-			this.imageList1.ImageSize = new System.Drawing.Size(16, 16);
-			this.imageList1.TransparentColor = System.Drawing.Color.Transparent;
+			this.colSize.Text = "Size";
+			this.colSize.Width = 74;
 			// 
 			// FirmwaresConfigInfo
 			// 
@@ -216,5 +223,6 @@
 		private System.Windows.Forms.ToolStripMenuItem tsmiOptionsCopy;
 		private System.Windows.Forms.ColumnHeader colInfo;
 		private System.Windows.Forms.ImageList imageList1;
+		private System.Windows.Forms.ColumnHeader colSize;
 	}
 }
\ No newline at end of file
diff --git a/BizHawk.Emulation.Common/Database/FirmwareDatabase.cs b/BizHawk.Emulation.Common/Database/FirmwareDatabase.cs
index 142129f8ee..f18b4ab0d6 100644
--- a/BizHawk.Emulation.Common/Database/FirmwareDatabase.cs
+++ b/BizHawk.Emulation.Common/Database/FirmwareDatabase.cs
@@ -9,53 +9,53 @@ namespace BizHawk.Emulation.Common
 		static FirmwareDatabase()
 		{
 			//FDS has two OK variants  (http://tcrf.net/Family_Computer_Disk_System)
-			var fds_nintendo = File("57FE1BDEE955BB48D357E463CCBF129496930B62", "disksys-nintendo.rom", "Bios (Nintendo)");
-			var fds_twinfc = File("E4E41472C454F928E53EB10E0509BF7D1146ECC1", "disksys-nintendo.rom", "Bios (TwinFC)");
+			var fds_nintendo = File("57FE1BDEE955BB48D357E463CCBF129496930B62", 8192, "disksys-nintendo.rom", "Bios (Nintendo)");
+			var fds_twinfc = File("E4E41472C454F928E53EB10E0509BF7D1146ECC1", 8192, "disksys-nintendo.rom", "Bios (TwinFC)");
 			Firmware("NES", "Bios_FDS", "Bios");
 			Option("NES", "Bios_FDS", fds_nintendo);
 			Option("NES", "Bios_FDS", fds_twinfc);
 
-			FirmwareAndOption("973E10840DB683CF3FAF61BD443090786B3A9F04", "SNES", "Rom_SGB", "sgb.sfc", "Super GameBoy Rom"); //World (Rev B) ?
-			FirmwareAndOption("A002F4EFBA42775A31185D443F3ED1790B0E949A", "SNES", "CX4", "cx4.rom", "CX4 Rom");
-			FirmwareAndOption("188D471FEFEA71EB53F0EE7064697FF0971B1014", "SNES", "DSP1", "dsp1.rom", "DSP1 Rom");
-			FirmwareAndOption("78B724811F5F18D8C67669D9390397EB1A47A5E2", "SNES", "DSP1b", "dsp1b.rom", "DSP1b Rom");
-			FirmwareAndOption("198C4B1C3BFC6D69E734C5957AF3DBFA26238DFB", "SNES", "DSP2", "dsp2.rom", "DSP2 Rom");
-			FirmwareAndOption("558DA7CB3BD3876A6CA693661FFC6C110E948CF9", "SNES", "DSP3", "dsp3.rom", "DSP3 Rom");
-			FirmwareAndOption("AF6478AECB6F1B67177E79C82CA04C56250A8C72", "SNES", "DSP4", "dsp4.rom", "DSP4 Rom");
-			FirmwareAndOption("6472828403DE3589433A906E2C3F3D274C0FF008", "SNES", "ST010", "st010.rom", "ST010 Rom");
-			FirmwareAndOption("FECBAE2CEC76C710422486BAA186FFA7CA1CF925", "SNES", "ST011", "st011.rom", "ST011 Rom");
-			FirmwareAndOption("91383B92745CC7CC4F15409AC5BC2C2F699A43F1", "SNES", "ST018", "st018.rom", "ST018 Rom");
-			FirmwareAndOption("79F5FF55DD10187C7FD7B8DAAB0B3FFBD1F56A2C", "PCECD", "Bios", "pcecd-3.0-(J).pce", "Super CD Bios (J)");
-			FirmwareAndOption("D9D134BB6B36907C615A594CC7688F7BFCEF5B43", "A78", "Bios_NTSC", "7800NTSCBIOS.bin", "NTSC Bios");
-			FirmwareAndOption("5A140136A16D1D83E4FF32A19409CA376A8DF874", "A78", "Bios_PAL", "7800PALBIOS.bin", "PAL Bios");
-			FirmwareAndOption("A3AF676991391A6DD716C79022D4947206B78164", "A78", "Bios_HSC", "7800highscore.bin", "Highscore Bios");
-			FirmwareAndOption("45BEDC4CBDEAC66C7DF59E9E599195C778D86A92", "Coleco", "Bios", "ColecoBios.bin", "Bios");
+			FirmwareAndOption("973E10840DB683CF3FAF61BD443090786B3A9F04", 262144, "SNES", "Rom_SGB", "sgb.sfc", "Super GameBoy Rom"); //World (Rev B) ?
+			FirmwareAndOption("A002F4EFBA42775A31185D443F3ED1790B0E949A", 3072, "SNES", "CX4", "cx4.rom", "CX4 Rom");
+			FirmwareAndOption("188D471FEFEA71EB53F0EE7064697FF0971B1014", 8192, "SNES", "DSP1", "dsp1.rom", "DSP1 Rom");
+			FirmwareAndOption("78B724811F5F18D8C67669D9390397EB1A47A5E2", 8192, "SNES", "DSP1b", "dsp1b.rom", "DSP1b Rom");
+			FirmwareAndOption("198C4B1C3BFC6D69E734C5957AF3DBFA26238DFB", 8192, "SNES", "DSP2", "dsp2.rom", "DSP2 Rom");
+			FirmwareAndOption("558DA7CB3BD3876A6CA693661FFC6C110E948CF9", 8192, "SNES", "DSP3", "dsp3.rom", "DSP3 Rom");
+			FirmwareAndOption("AF6478AECB6F1B67177E79C82CA04C56250A8C72", 8192, "SNES", "DSP4", "dsp4.rom", "DSP4 Rom");
+			FirmwareAndOption("6472828403DE3589433A906E2C3F3D274C0FF008", 53248, "SNES", "ST010", "st010.rom", "ST010 Rom");
+			FirmwareAndOption("FECBAE2CEC76C710422486BAA186FFA7CA1CF925", 53248, "SNES", "ST011", "st011.rom", "ST011 Rom");
+			FirmwareAndOption("91383B92745CC7CC4F15409AC5BC2C2F699A43F1", 163840, "SNES", "ST018", "st018.rom", "ST018 Rom");
+			FirmwareAndOption("79F5FF55DD10187C7FD7B8DAAB0B3FFBD1F56A2C", 262144, "PCECD", "Bios", "pcecd-3.0-(J).pce", "Super CD Bios (J)");
+			FirmwareAndOption("D9D134BB6B36907C615A594CC7688F7BFCEF5B43", 4096, "A78", "Bios_NTSC", "7800NTSCBIOS.bin", "NTSC Bios");
+			FirmwareAndOption("5A140136A16D1D83E4FF32A19409CA376A8DF874", 16384, "A78", "Bios_PAL", "7800PALBIOS.bin", "PAL Bios");
+			FirmwareAndOption("A3AF676991391A6DD716C79022D4947206B78164", 4096, "A78", "Bios_HSC", "7800highscore.bin", "Highscore Bios");
+			FirmwareAndOption("45BEDC4CBDEAC66C7DF59E9E599195C778D86A92", 8192, "Coleco", "Bios", "ColecoBios.bin", "Bios");
 
 			{
-				var GBA_JDebug = File("AA98A2AD32B86106340665D1222D7D973A1361C7", "gbabios.rom", "Bios (J Debug)");
-				var GBA_Normal = File("300C20DF6731A33952DED8C436F7F186D25D3492", "gbabios.rom", "Bios (World)");
+				var GBA_JDebug = File("AA98A2AD32B86106340665D1222D7D973A1361C7", 16384, "gbabios.rom", "Bios (J Debug)"); //?? is this size correct?
+				var GBA_Normal = File("300C20DF6731A33952DED8C436F7F186D25D3492", 16384, "gbabios.rom", "Bios (World)");
 				Firmware("GBA", "Bios", "Bios");
 				Option("GBA", "Bios", GBA_Normal);
 				Option("GBA", "Bios", GBA_JDebug);
 			}
 
-			FirmwareAndOption("E4ED47FAE31693E016B081C6BDA48DA5B70D7CCB", "LYNX", "Boot", "lynxboot.img", "Boot Rom");
+			FirmwareAndOption("E4ED47FAE31693E016B081C6BDA48DA5B70D7CCB", 512, "LYNX", "Boot", "lynxboot.img", "Boot Rom");
 
 
 			//FirmwareAndOption("24F67BDEA115A2C847C8813A262502EE1607B7DF", "NDS", "Bios_Arm7", "biosnds7.rom", "ARM7 Bios");
 			//FirmwareAndOption("BFAAC75F101C135E32E2AAF541DE6B1BE4C8C62D", "NDS", "Bios_Arm9", "biosnds9.rom", "ARM9 Bios");
-			FirmwareAndOption("5A65B922B562CB1F57DAB51B73151283F0E20C7A", "INTV", "EROM", "erom.bin", "Executive Rom");
-			FirmwareAndOption("F9608BB4AD1CFE3640D02844C7AD8E0BCD974917", "INTV", "GROM", "grom.bin", "Graphics Rom");
-			FirmwareAndOption("1D503E56DF85A62FEE696E7618DC5B4E781DF1BB", "C64", "Kernal", "c64-kernal.bin", "Kernal Rom");
-			FirmwareAndOption("79015323128650C742A3694C9429AA91F355905E", "C64", "Basic", "c64-basic.bin", "Basic Rom");
-			FirmwareAndOption("ADC7C31E18C7C7413D54802EF2F4193DA14711AA", "C64", "Chargen", "c64-chargen.bin", "Chargen Rom");
+			FirmwareAndOption("5A65B922B562CB1F57DAB51B73151283F0E20C7A", 8192, "INTV", "EROM", "erom.bin", "Executive Rom");
+			FirmwareAndOption("F9608BB4AD1CFE3640D02844C7AD8E0BCD974917", 2048, "INTV", "GROM", "grom.bin", "Graphics Rom");
+			FirmwareAndOption("1D503E56DF85A62FEE696E7618DC5B4E781DF1BB", 8192, "C64", "Kernal", "c64-kernal.bin", "Kernal Rom");
+			FirmwareAndOption("79015323128650C742A3694C9429AA91F355905E", 8192, "C64", "Basic", "c64-basic.bin", "Basic Rom");
+			FirmwareAndOption("ADC7C31E18C7C7413D54802EF2F4193DA14711AA", 4096, "C64", "Chargen", "c64-chargen.bin", "Chargen Rom");
 
 			//for saturn, we think any bios region can pretty much run any iso
 			//so, we're going to lay this out carefully so that we choose things in a sensible order, but prefer the correct region
-			var ss_100_j = File("2B8CB4F87580683EB4D760E4ED210813D667F0A2", "saturn-1.00-(J).bin", "Bios v1.00 (J)");
-			var ss_100_ue = File("FAA8EA183A6D7BBE5D4E03BB1332519800D3FBC3", "saturn-1.00-(U+E).bin", "Bios v1.00 (U+E)");
-			var ss_100a_ue = File("3BB41FEB82838AB9A35601AC666DE5AACFD17A58", "saturn-1.00a-(U+E).bin", "Bios v1.00a (U+E)");
-			var ss_101_j = File("DF94C5B4D47EB3CC404D88B33A8FDA237EAF4720", "saturn-1.01-(J).bin", "Bios v1.01 (J)");
+			var ss_100_j = File("2B8CB4F87580683EB4D760E4ED210813D667F0A2", 524288, "saturn-1.00-(J).bin", "Bios v1.00 (J)");
+			var ss_100_ue = File("FAA8EA183A6D7BBE5D4E03BB1332519800D3FBC3", 524288, "saturn-1.00-(U+E).bin", "Bios v1.00 (U+E)");
+			var ss_100a_ue = File("3BB41FEB82838AB9A35601AC666DE5AACFD17A58", 524288, "saturn-1.00a-(U+E).bin", "Bios v1.00a (U+E)"); //?? is this size correct?
+			var ss_101_j = File("DF94C5B4D47EB3CC404D88B33A8FDA237EAF4720", 524288, "saturn-1.01-(J).bin", "Bios v1.01 (J)"); //?? is this size correct?
 			Firmware("SAT", "J", "Bios (J)");
 			Option("SAT", "J", ss_100_j);
 			Option("SAT", "J", ss_101_j);
@@ -72,14 +72,14 @@ namespace BizHawk.Emulation.Common
 			Option("SAT", "E", ss_100_j);
 			Option("SAT", "E", ss_101_j);
 
-			var ti83_102 = File("CE08F6A808701FC6672230A790167EE485157561", "ti83_102.rom", "TI-83 Rom v1.02");
-			var ti83_103 = File("8399E384804D8D29866CAA4C8763D7A61946A467", "ti83_103.rom", "TI-83 Rom v1.03");
-			var ti83_104 = File("33877FF637DC5F4C5388799FD7E2159B48E72893", "ti83_104.rom", "TI-83 Rom v1.04");
-			var ti83_106 = File("3D65C2A1B771CE8E5E5A0476EC1AA9C9CDC0E833", "ti83_106.rom", "TI-83 Rom v1.06");
-			var ti83_107 = File("EF66DAD3E7B2B6A86F326765E7DFD7D1A308AD8F", "ti83_107.rom", "TI-83 Rom v1.07"); //formerly the 1.?? recommended one
-			var ti83_108 = File("9C74F0B61655E9E160E92164DB472AD7EE02B0F8", "ti83_108.rom", "TI-83 Rom v1.08");
-			var ti83p_103 = File("37EAEEB9FB5C18FB494E322B75070E80CC4D858E", "ti83p_103b.rom", "TI-83 Plus Rom v1.03");
-			var ti83p_112 = File("6615DF5554076B6B81BD128BF847D2FF046E556B", "ti83p_112.rom", "TI-83 Plus Rom v1.12");
+			var ti83_102 = File("CE08F6A808701FC6672230A790167EE485157561", 262144, "ti83_102.rom", "TI-83 Rom v1.02"); //?? is this size correct?
+			var ti83_103 = File("8399E384804D8D29866CAA4C8763D7A61946A467", 262144, "ti83_103.rom", "TI-83 Rom v1.03"); //?? is this size correct?
+			var ti83_104 = File("33877FF637DC5F4C5388799FD7E2159B48E72893", 262144, "ti83_104.rom", "TI-83 Rom v1.04"); //?? is this size correct?
+			var ti83_106 = File("3D65C2A1B771CE8E5E5A0476EC1AA9C9CDC0E833", 262144, "ti83_106.rom", "TI-83 Rom v1.06"); //?? is this size correct?
+			var ti83_107 = File("EF66DAD3E7B2B6A86F326765E7DFD7D1A308AD8F", 262144, "ti83_107.rom", "TI-83 Rom v1.07"); //formerly the 1.?? recommended one
+			var ti83_108 = File("9C74F0B61655E9E160E92164DB472AD7EE02B0F8", 262144, "ti83_108.rom", "TI-83 Rom v1.08"); //?? is this size correct?
+			var ti83p_103 = File("37EAEEB9FB5C18FB494E322B75070E80CC4D858E", 262144, "ti83p_103b.rom", "TI-83 Plus Rom v1.03"); //?? is this size correct?
+			var ti83p_112 = File("6615DF5554076B6B81BD128BF847D2FF046E556B", 262144, "ti83p_112.rom", "TI-83 Plus Rom v1.12"); //?? is this size correct?
 
 			Firmware("TI83", "Rom", "TI-83 Rom");
 			Option("TI83", "Rom", ti83_102);
@@ -92,13 +92,13 @@ namespace BizHawk.Emulation.Common
 			Option("TI83", "Rom", ti83p_112);
 
 			// mega cd
-			var eu_mcd1_9210 = File("f891e0ea651e2232af0c5c4cb46a0cae2ee8f356", "eu_mcd1_9210.bin", "Mega CD EU (9210)");
-			var eu_mcd2_9303 = File("7063192ae9f6b696c5b81bc8f0a9fe6f0c400e58", "eu_mcd2_9303.bin", "Mega CD EU (9303)");
-			var eu_mcd2_9306 = File("523b3125fb0ac094e16aa072bc6ccdca22e520e5", "eu_mcd2_9306.bin", "Mega CD EU (9310)");
-			var jp_mcd1_9111 = File("4846f448160059a7da0215a5df12ca160f26dd69", "jp_mcd1_9111.bin", "Mega CD JP (9111)");
-			var jp_mcd1_9112 = File("e4193c6ae44c3cea002707d2a88f1fbcced664de", "jp_mcd1_9112.bin", "Mega CD JP (9112)");
-			var us_scd1_9210 = File("f4f315adcef9b8feb0364c21ab7f0eaf5457f3ed", "us_scd1_9210.bin", "Sega CD US (9210)");
-			var us_scd2_9303 = File("bd3ee0c8ab732468748bf98953603ce772612704", "us_scd2_9303.bin", "Sega CD US (9303)");
+			var eu_mcd1_9210 = File("f891e0ea651e2232af0c5c4cb46a0cae2ee8f356", 131072, "eu_mcd1_9210.bin", "Mega CD EU (9210)"); //?? is this size correct?
+			var eu_mcd2_9303 = File("7063192ae9f6b696c5b81bc8f0a9fe6f0c400e58", 131072, "eu_mcd2_9303.bin", "Mega CD EU (9303)"); //?? is this size correct?
+			var eu_mcd2_9306 = File("523b3125fb0ac094e16aa072bc6ccdca22e520e5", 131072, "eu_mcd2_9306.bin", "Mega CD EU (9310)"); //?? is this size correct?
+			var jp_mcd1_9111 = File("4846f448160059a7da0215a5df12ca160f26dd69", 131072, "jp_mcd1_9111.bin", "Mega CD JP (9111)"); //?? is this size correct?
+			var jp_mcd1_9112 = File("e4193c6ae44c3cea002707d2a88f1fbcced664de", 131072, "jp_mcd1_9112.bin", "Mega CD JP (9112)"); //?? is this size correct?
+			var us_scd1_9210 = File("f4f315adcef9b8feb0364c21ab7f0eaf5457f3ed", 131072, "us_scd1_9210.bin", "Sega CD US (9210)"); //?? is this size correct?
+			var us_scd2_9303 = File("bd3ee0c8ab732468748bf98953603ce772612704", 131072, "us_scd2_9303.bin", "Sega CD US (9303)"); //?? is this size correct?
 
 			Firmware("GEN", "CD_BIOS_EU", "Mega CD Bios (Europe)");
 			Firmware("GEN", "CD_BIOS_JP", "Mega CD Bios (Japan)");
@@ -112,10 +112,10 @@ namespace BizHawk.Emulation.Common
 			Option("GEN", "CD_BIOS_US", us_scd2_9303);
 
 			// SMS
-			var sms_us_13 = File("C315672807D8DDB8D91443729405C766DD95CAE7", "sms_us_1.3.sms", "SMS BIOS 1.3 (USA, Europe)");
-			var sms_jp_21 = File("A8C1B39A2E41137835EDA6A5DE6D46DD9FADBAF2", "sms_jp_2.1.sms", "SMS BIOS 2.1 (Japan)");
-			var sms_us_1b = File("29091FF60EF4C22B1EE17AA21E0E75BAC6B36474", "sms_us_1.0b.sms", "SMS BIOS 1.0 (USA) (Proto)");
-			var sms_m404 = File("4A06C8E66261611DCE0305217C42138B71331701", "sms_m404.sms", "SMS BIOS (USA) (M404) (Proto)");
+			var sms_us_13 = File("C315672807D8DDB8D91443729405C766DD95CAE7", 8192, "sms_us_1.3.sms", "SMS BIOS 1.3 (USA, Europe)");
+			var sms_jp_21 = File("A8C1B39A2E41137835EDA6A5DE6D46DD9FADBAF2", 8192, "sms_jp_2.1.sms", "SMS BIOS 2.1 (Japan)");
+			var sms_us_1b = File("29091FF60EF4C22B1EE17AA21E0E75BAC6B36474", 8192, "sms_us_1.0b.sms", "SMS BIOS 1.0 (USA) (Proto)"); //?? is this size correct?
+			var sms_m404 = File("4A06C8E66261611DCE0305217C42138B71331701", 8192, "sms_m404.sms", "SMS BIOS (USA) (M404) (Proto)"); //?? is this size correct?
 
 			Firmware("SMS", "Export", "SMS Bios (USA/Export)");
 			Firmware("SMS", "Japan", "SMS Bios (Japan)");
@@ -130,30 +130,30 @@ namespace BizHawk.Emulation.Common
 			//https://en.wikipedia.org/wiki/PlayStation_models#Comparison_of_models [w]
 			//https://github.com/petrockblog/RetroPie-Setup/wiki/PCSX-Core-Playstation-1 [g] 
 			//http://redump.org/datfile/psx-bios/ also
-			var ps_10j = File("343883A7B555646DA8CEE54AADD2795B6E7DD070", "ps-10j.bin", "PSX BIOS (Version 1.0 J)", "Used on SCPH-1000, DTL-H1000 [g]. This is Rev for A hardware [w].");
-			var ps_11j = File("B06F4A861F74270BE819AA2A07DB8D0563A7CC4E", "ps-11j.bin", "PSX BIOS (Version 1.1 01/22/95)", "Used on SCPH-3000, DTL-H1000H [g]. This is for Rev B hardware [w].");
-			var ps_20a = File("649895EFD79D14790EABB362E94EB0622093DFB9", "ps-20a.bin", "PSX BIOS (Version 2.0 05/07/95 A)", "Used on DTL-H1001 [g]. This is for Rev B hardware [w].");
-			var ps_20e = File("20B98F3D80F11CBF5A7BFD0779B0E63760ECC62C", "ps-20e.bin", "PSX BIOS (Version 2.0 05/10/95 E)", "Used on DTL-H1002, SCPH-1002 [g]. This is for Rev B hardware [w].");
-			var ps_21j = File("E38466A4BA8005FBA7E9E3C7B9EFEBA7205BEE3F", "ps-21j.bin", "PSX BIOS (Version 2.1 07/17/95 J)", "Used on SCPH-3500 [g]. This is for Rev B hardware [w].");
-			var ps_21a = File("CA7AF30B50D9756CBD764640126C454CFF658479", "ps-21a.bin", "PSX BIOS (Version 2.1 07/17/95 A)", "Used on DTL-H1101 [g]. This is for Rev B hardware, presumably.");
-			var ps_21e = File("76CF6B1B2A7C571A6AD07F2BAC0DB6CD8F71E2CC", "ps-21e.bin", "PSX BIOS (Version 2.1 07/17/95 E)", "Used on SCPH-1002, DTL-H1102 [g]. This is for Rev B hardware [w].");
-			var ps_22j = File("FFA7F9A7FB19D773A0C3985A541C8E5623D2C30D", "ps-22j.bin", "PSX BIOS (Version 2.2 12/04/95 J)", "Used on SCPH-5000, DTL-H1200, DTL-H3000 [g]. This is for Rev C hardware [w].");
-			var ps_22j_bad = File("E340DB2696274DDA5FDC25E434A914DB71E8B02B", "ps-22j-bad.bin", "BAD DUMP OF SCPH-5000. Found on [p]."); //BAD!!
-			var ps_22a = File("10155D8D6E6E832D6EA66DB9BC098321FB5E8EBF", "ps-22a.bin", "PSX BIOS (Version 2.2 12/04/95 A)", "Used on SCPH-1001, DTL-H1201, DTL-H3001 [g]. This is for Rev C hardware [w].");
-			var ps_22e = File("B6A11579CAEF3875504FCF3831B8E3922746DF2C", "ps-22e.bin", "PSX BIOS (Version 2.2 12/04/95 E)", "Used on SCPH-1002, DTL-H1202, DTL-H3002 [g]. This is for Rev C hardware [w].");
-			var ps_22d = File("73107D468FC7CB1D2C5B18B269715DD889ECEF06", "ps-22d.bin", "PSX BIOS (Version 2.2 03/06/96 D)", "Used on DTL-H1100 [g]. This is for Rev C hardware, presumably.");
-			var ps_30j = File("B05DEF971D8EC59F346F2D9AC21FB742E3EB6917", "ps-30j.bin", "PSX BIOS (Version 3.0 09/09/96 J)", "Used on SCPH-5500 [g]. This is for Rev C hardware [w]. Recommended for (J) [f].");
-			var ps_30a = File("0555C6FAE8906F3F09BAF5988F00E55F88E9F30B", "ps-30a.bin", "PSX BIOS (Version 3.0 11/18/96 A)", "Used on SCPH-5501, SCPH-5503, SCPH-7003 [g]. This is for Rev C hardware [w]. Recommended for (U) [f].");
-			var ps_30e = File("F6BC2D1F5EB6593DE7D089C425AC681D6FFFD3F0", "ps-30e.bin", "PSX BIOS (Version 3.0 01/06/97 E)", "Used on SCPH-5502, SCPH-5552 [g]. This is for Rev C hardware [w]. Recommended for (E) [f].");
-			var ps_30e_bad = File("F8DE9325FC36FCFA4B29124D291C9251094F2E54", "ps-30e-bad.bin", "BAD DUMP OF SCPH-5502. Found on [p]."); //BAD!
-			var ps_40j = File("77B10118D21AC7FFA9B35F9C4FD814DA240EB3E9", "ps-40j.bin", "PSX BIOS (Version 4.0 08/18/97 J)", "Used on SCPH-7000, SCPH-7500, SCPH-9000 [g]. This is for Rev C hardware [w].");
-			var ps_41a = File("14DF4F6C1E367CE097C11DEAE21566B4FE5647A9", "ps-41a.bin", "PSX BIOS (Version 4.1 12/16/97 A)", "Used on SCPH-7001, SCPH-7501, SCPH-7503, SCPH-9001, SCPH-9003, SCPH-9903 [g]. This is for Rev C hardware [w].");
-			var ps_41e = File("8D5DE56A79954F29E9006929BA3FED9B6A418C1D", "ps-41e.bin", "PSX BIOS (Version 4.1 12/16/97 E)", "Used on SCPH-7002, SCPH-7502, SCPH-9002 [g]. This is for Rev C hardware [w].");
-			var psone_43j = File("339A48F4FCF63E10B5B867B8C93CFD40945FAF6C", "psone-43j.bin", "PSX BIOS (Version 4.3 03/11/00 J)", "Used on PSone SCPH-100 [g]. This is for Rev C PSone hardware [w].");
-			var psone_44e = File("BEB0AC693C0DC26DAF5665B3314DB81480FA5C7C", "psone-44e.bin", "PSX BIOS (Version 4.4 03/24/00 E)", "Used on PSone SCPH-102 [g]. This is for Rev C PSone hardware [w].");
-			var psone_45a = File("DCFFE16BD90A723499AD46C641424981338D8378", "psone-45a.bin", "PSX BIOS (Version 4.5 05/25/00 A)", "Used on PSone SCPH-101 [g]. This is for Rev C PSone hardware [w].");
-			var psone_r5e = File("DBC7339E5D85827C095764FC077B41F78FD2ECAE", "psone-45e.bin", "PSX BIOS (Version 4.5 05/25/00 E)", "Used on PSone SCPH-102 [g]. This is for Rev C PSone hardware [w].");
-			var ps2_50j = File("D7D6BE084F51354BC951D8FA2D8D912AA70ABC5E", "ps2-50j.bin", "PSX BIOS (Version 5.0 10/27/00 J)", "Found on a PS2 [p].");
+			var ps_10j = File("343883A7B555646DA8CEE54AADD2795B6E7DD070", 524288, "ps-10j.bin", "PSX BIOS (Version 1.0 J)", "Used on SCPH-1000, DTL-H1000 [g]. This is Rev for A hardware [w].");
+			var ps_11j = File("B06F4A861F74270BE819AA2A07DB8D0563A7CC4E", 524288, "ps-11j.bin", "PSX BIOS (Version 1.1 01/22/95)", "Used on SCPH-3000, DTL-H1000H [g]. This is for Rev B hardware [w].");
+			var ps_20a = File("649895EFD79D14790EABB362E94EB0622093DFB9", 524288, "ps-20a.bin", "PSX BIOS (Version 2.0 05/07/95 A)", "Used on DTL-H1001 [g]. This is for Rev B hardware [w].");
+			var ps_20e = File("20B98F3D80F11CBF5A7BFD0779B0E63760ECC62C", 524288, "ps-20e.bin", "PSX BIOS (Version 2.0 05/10/95 E)", "Used on DTL-H1002, SCPH-1002 [g]. This is for Rev B hardware [w].");
+			var ps_21j = File("E38466A4BA8005FBA7E9E3C7B9EFEBA7205BEE3F", 524288, "ps-21j.bin", "PSX BIOS (Version 2.1 07/17/95 J)", "Used on SCPH-3500 [g]. This is for Rev B hardware [w].");
+			var ps_21a = File("CA7AF30B50D9756CBD764640126C454CFF658479", 524288, "ps-21a.bin", "PSX BIOS (Version 2.1 07/17/95 A)", "Used on DTL-H1101 [g]. This is for Rev B hardware, presumably.");
+			var ps_21e = File("76CF6B1B2A7C571A6AD07F2BAC0DB6CD8F71E2CC", 524288, "ps-21e.bin", "PSX BIOS (Version 2.1 07/17/95 E)", "Used on SCPH-1002, DTL-H1102 [g]. This is for Rev B hardware [w].");
+			var ps_22j = File("FFA7F9A7FB19D773A0C3985A541C8E5623D2C30D", 524288, "ps-22j.bin", "PSX BIOS (Version 2.2 12/04/95 J)", "Used on SCPH-5000, DTL-H1200, DTL-H3000 [g]. This is for Rev C hardware [w].");
+			var ps_22j_bad = File("E340DB2696274DDA5FDC25E434A914DB71E8B02B", 524288, "ps-22j-bad.bin", "BAD DUMP OF SCPH-5000. Found on [p]."); //BAD!!
+			var ps_22a = File("10155D8D6E6E832D6EA66DB9BC098321FB5E8EBF", 524288, "ps-22a.bin", "PSX BIOS (Version 2.2 12/04/95 A)", "Used on SCPH-1001, DTL-H1201, DTL-H3001 [g]. This is for Rev C hardware [w].");
+			var ps_22e = File("B6A11579CAEF3875504FCF3831B8E3922746DF2C", 524288, "ps-22e.bin", "PSX BIOS (Version 2.2 12/04/95 E)", "Used on SCPH-1002, DTL-H1202, DTL-H3002 [g]. This is for Rev C hardware [w].");
+			var ps_22d = File("73107D468FC7CB1D2C5B18B269715DD889ECEF06", 524288, "ps-22d.bin", "PSX BIOS (Version 2.2 03/06/96 D)", "Used on DTL-H1100 [g]. This is for Rev C hardware, presumably.");
+			var ps_30j = File("B05DEF971D8EC59F346F2D9AC21FB742E3EB6917", 524288, "ps-30j.bin", "PSX BIOS (Version 3.0 09/09/96 J)", "Used on SCPH-5500 [g]. This is for Rev C hardware [w]. Recommended for (J) [f].");
+			var ps_30a = File("0555C6FAE8906F3F09BAF5988F00E55F88E9F30B", 524288, "ps-30a.bin", "PSX BIOS (Version 3.0 11/18/96 A)", "Used on SCPH-5501, SCPH-5503, SCPH-7003 [g]. This is for Rev C hardware [w]. Recommended for (U) [f].");
+			var ps_30e = File("F6BC2D1F5EB6593DE7D089C425AC681D6FFFD3F0", 524288, "ps-30e.bin", "PSX BIOS (Version 3.0 01/06/97 E)", "Used on SCPH-5502, SCPH-5552 [g]. This is for Rev C hardware [w]. Recommended for (E) [f].");
+			var ps_30e_bad = File("F8DE9325FC36FCFA4B29124D291C9251094F2E54", 524288, "ps-30e-bad.bin", "BAD DUMP OF SCPH-5502. Found on [p]."); //BAD!
+			var ps_40j = File("77B10118D21AC7FFA9B35F9C4FD814DA240EB3E9", 524288, "ps-40j.bin", "PSX BIOS (Version 4.0 08/18/97 J)", "Used on SCPH-7000, SCPH-7500, SCPH-9000 [g]. This is for Rev C hardware [w].");
+			var ps_41a = File("14DF4F6C1E367CE097C11DEAE21566B4FE5647A9", 524288, "ps-41a.bin", "PSX BIOS (Version 4.1 12/16/97 A)", "Used on SCPH-7001, SCPH-7501, SCPH-7503, SCPH-9001, SCPH-9003, SCPH-9903 [g]. This is for Rev C hardware [w].");
+			var ps_41e = File("8D5DE56A79954F29E9006929BA3FED9B6A418C1D", 524288, "ps-41e.bin", "PSX BIOS (Version 4.1 12/16/97 E)", "Used on SCPH-7002, SCPH-7502, SCPH-9002 [g]. This is for Rev C hardware [w].");
+			var psone_43j = File("339A48F4FCF63E10B5B867B8C93CFD40945FAF6C", 524288, "psone-43j.bin", "PSX BIOS (Version 4.3 03/11/00 J)", "Used on PSone SCPH-100 [g]. This is for Rev C PSone hardware [w].");
+			var psone_44e = File("BEB0AC693C0DC26DAF5665B3314DB81480FA5C7C", 524288, "psone-44e.bin", "PSX BIOS (Version 4.4 03/24/00 E)", "Used on PSone SCPH-102 [g]. This is for Rev C PSone hardware [w].");
+			var psone_45a = File("DCFFE16BD90A723499AD46C641424981338D8378", 524288, "psone-45a.bin", "PSX BIOS (Version 4.5 05/25/00 A)", "Used on PSone SCPH-101 [g]. This is for Rev C PSone hardware [w].");
+			var psone_r5e = File("DBC7339E5D85827C095764FC077B41F78FD2ECAE", 524288, "psone-45e.bin", "PSX BIOS (Version 4.5 05/25/00 E)", "Used on PSone SCPH-102 [g]. This is for Rev C PSone hardware [w].");
+			var ps2_50j = File("D7D6BE084F51354BC951D8FA2D8D912AA70ABC5E", 99999, "ps2-50j.bin", "PSX BIOS (Version 5.0 10/27/00 J)", "Found on a PS2 [p]."); //not sure about this size
 
 			ps_22j_bad.bad = ps_30e_bad.bad = true;
 
@@ -205,7 +205,7 @@ namespace BizHawk.Emulation.Common
 		}
 
 		//adds an acceptable option for a firmware ID to the database
-		static FirmwareOption Option(string hash, string systemId, string id, FirmwareOptionStatus status = FirmwareOptionStatus.Acceptable)
+		static FirmwareOption Option(string hash, long size, string systemId, string id, FirmwareOptionStatus status = FirmwareOptionStatus.Acceptable)
 		{
 			var fo = new FirmwareOption
 				{
@@ -213,6 +213,7 @@ namespace BizHawk.Emulation.Common
 					firmwareId = id,
 					hash = hash,
 					status = status,
+					size = size
 				};
 
 			FirmwareOptions.Add(fo);
@@ -227,20 +228,21 @@ namespace BizHawk.Emulation.Common
 		//adds an acceptable option for a firmware ID to the database
 		static FirmwareOption Option(string systemId, string id, FirmwareFile ff, FirmwareOptionStatus status = FirmwareOptionStatus.Acceptable)
 		{
-			var fo = Option(ff.hash, systemId, id, status);
+			var fo = Option(ff.hash, ff.size, systemId, id, status);
 			//make sure this goes in as bad
 			if(ff.bad) fo.status = FirmwareOptionStatus.Bad;
 			return fo;
 		}
 
 		//defines a firmware file
-		static FirmwareFile File(string hash, string recommendedName, string descr, string additionalInfo = "")
+		static FirmwareFile File(string hash, long size, string recommendedName, string descr, string additionalInfo = "")
 		{
 			string hashfix = hash.ToUpperInvariant();
 
 			var ff = new FirmwareFile
 				{
 					hash = hashfix,
+					size = size,
 					recommendedName = recommendedName,
 					descr = descr,
 					info = additionalInfo
@@ -251,11 +253,11 @@ namespace BizHawk.Emulation.Common
 		}
 
 		//adds a defined firmware ID and one file and option
-		static void FirmwareAndOption(string hash, string systemId, string id, string name, string descr)
+		static void FirmwareAndOption(string hash, long size, string systemId, string id, string name, string descr)
 		{
 			Firmware(systemId, id, descr);
-			File(hash, name, descr, "");
-			Option(hash, systemId, id);
+			File(hash, size, name, descr, "");
+			Option(hash, size, systemId, id);
 		}
 
 
@@ -268,6 +270,7 @@ namespace BizHawk.Emulation.Common
 		public class FirmwareFile
 		{
 			public string hash;
+			public long size;
 			public string recommendedName;
 			public string descr;
 			public string info;
@@ -292,6 +295,7 @@ namespace BizHawk.Emulation.Common
 			public string systemId;
 			public string firmwareId;
 			public string hash;
+			public long size;
 			public FirmwareOptionStatus status;
 			public bool IsAcceptableOrIdeal { get { return status == FirmwareOptionStatus.Ideal || status == FirmwareOptionStatus.Acceptable; } }
 			public string ConfigKey { get { return string.Format("{0}+{1}", systemId, firmwareId); } }