// /*************************************************************************** // The Disc Image Chef // ---------------------------------------------------------------------------- // // Filename : Dreamcast.cs // Author(s) : Natalia Portillo // // Component : Device structures decoders. // // --[ Description ] ---------------------------------------------------------- // // Decodes Sega Dreamcast IP.BIN. // // --[ License ] -------------------------------------------------------------- // // This library is free software; you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as // published by the Free Software Foundation; either version 2.1 of the // License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, see . // // ---------------------------------------------------------------------------- // Copyright © 2011-2019 Natalia Portillo // ****************************************************************************/ using System; using System.Diagnostics.CodeAnalysis; using System.Globalization; using System.Runtime.InteropServices; using System.Text; using DiscImageChef.Console; using Marshal = DiscImageChef.Helpers.Marshal; namespace DiscImageChef.Decoders.Sega { [SuppressMessage("ReSharper", "InconsistentNaming")] [SuppressMessage("ReSharper", "MemberCanBeInternal")] [SuppressMessage("ReSharper", "MemberCanBePrivate.Global")] public static class Dreamcast { [StructLayout(LayoutKind.Sequential, Pack = 1)] public struct IPBin { /// Must be "SEGA SEGAKATANA " [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public byte[] SegaHardwareID; /// 0x010, "SEGA ENTERPRISES" [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public byte[] maker_id; /// 0x020, CRC of product_no and product_version public uint dreamcast_crc; /// 0x024, " " public byte spare_space1; /// 0x025, "GD-ROM" [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)] public byte[] dreamcast_media; /// 0x02B, Disc number public byte disc_no; /// 0x02C, '/' public byte disc_no_separator; /// 0x02D, Total number of discs public byte disc_total_nos; /// 0x02E, " " [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)] public byte[] spare_space2; /// 0x030, Region codes, space-filled [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] region_codes; /// 0x038, Supported peripherals, bitwise [MarshalAs(UnmanagedType.ByValArray, SizeConst = 7)] public byte[] peripherals; /// 0x03F, ' ' public byte spare_space3; /// 0x040, Product number [MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)] public byte[] product_no; /// 0x04A, Product version [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)] public byte[] product_version; /// 0x050, YYYYMMDD [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] release_date; /// 0x058, " " [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] spare_space4; /// 0x060, Usually "1ST_READ.BIN" or "0WINCE.BIN " [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)] public byte[] boot_filename; /// 0x06C, " " [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)] public byte[] spare_space5; /// 0x070, Game producer, space-filled [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public byte[] producer; /// 0x080, Game name, space-filled [MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)] public byte[] product_name; } public static IPBin? DecodeIPBin(byte[] ipbin_sector) { if(ipbin_sector == null) return null; if(ipbin_sector.Length < 512) return null; IPBin ipbin = Marshal.ByteArrayToStructureLittleEndian(ipbin_sector); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.maker_id = \"{0}\"", Encoding.ASCII.GetString(ipbin.maker_id)); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.spare_space1 = \"{0}\"", (char)ipbin.spare_space1); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.dreamcast_media = \"{0}\"", Encoding.ASCII.GetString(ipbin.dreamcast_media)); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.disc_no = {0}", (char)ipbin.disc_no); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.disc_no_separator = \"{0}\"", (char)ipbin.disc_no_separator); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.disc_total_nos = \"{0}\"", (char)ipbin.disc_total_nos); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.spare_space2 = \"{0}\"", Encoding.ASCII.GetString(ipbin.spare_space2)); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.region_codes = \"{0}\"", Encoding.ASCII.GetString(ipbin.region_codes)); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.peripherals = \"{0}\"", Encoding.ASCII.GetString(ipbin.peripherals)); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.product_no = \"{0}\"", Encoding.ASCII.GetString(ipbin.product_no)); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.product_version = \"{0}\"", Encoding.ASCII.GetString(ipbin.product_version)); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.release_date = \"{0}\"", Encoding.ASCII.GetString(ipbin.release_date)); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.spare_space3 = \"{0}\"", (char)ipbin.spare_space3); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.boot_filename = \"{0}\"", Encoding.ASCII.GetString(ipbin.boot_filename)); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.producer = \"{0}\"", Encoding.ASCII.GetString(ipbin.producer)); DicConsole.DebugWriteLine("Dreamcast IP.BIN Decoder", "dreamcast_ipbin.product_name = \"{0}\"", Encoding.ASCII.GetString(ipbin.product_name)); return Encoding.ASCII.GetString(ipbin.SegaHardwareID) == "SEGA SEGAKATANA " ? ipbin : (IPBin?)null; } public static string Prettify(IPBin? decoded) { if(decoded == null) return null; IPBin ipbin = decoded.Value; StringBuilder IPBinInformation = new StringBuilder(); IPBinInformation.AppendLine("--------------------------------"); IPBinInformation.AppendLine("SEGA IP.BIN INFORMATION:"); IPBinInformation.AppendLine("--------------------------------"); // Decoding all data DateTime ipbindate; CultureInfo provider = CultureInfo.InvariantCulture; ipbindate = DateTime.ParseExact(Encoding.ASCII.GetString(ipbin.release_date), "yyyyMMdd", provider); IPBinInformation.AppendFormat("Product name: {0}", Encoding.ASCII.GetString(ipbin.product_name)) .AppendLine(); IPBinInformation.AppendFormat("Product version: {0}", Encoding.ASCII.GetString(ipbin.product_version)) .AppendLine(); IPBinInformation.AppendFormat("Product CRC: 0x{0:X8}", ipbin.dreamcast_crc).AppendLine(); IPBinInformation.AppendFormat("Producer: {0}", Encoding.ASCII.GetString(ipbin.producer)).AppendLine(); IPBinInformation.AppendFormat("Disc media: {0}", Encoding.ASCII.GetString(ipbin.dreamcast_media)) .AppendLine(); IPBinInformation.AppendFormat("Disc number {0} of {1}", (char)ipbin.disc_no, (char)ipbin.disc_total_nos) .AppendLine(); IPBinInformation.AppendFormat("Release date: {0}", ipbindate).AppendLine(); switch(Encoding.ASCII.GetString(ipbin.boot_filename)) { case "1ST_READ.BIN": IPBinInformation.AppendLine("Disc boots natively."); break; case "0WINCE.BIN ": IPBinInformation.AppendLine("Disc boots using Windows CE."); break; default: IPBinInformation.AppendFormat("Disc boots using unknown loader: {0}.", Encoding.ASCII.GetString(ipbin.boot_filename)).AppendLine(); break; } IPBinInformation.AppendLine("Regions supported:"); foreach(byte region in ipbin.region_codes) switch((char)region) { case 'J': IPBinInformation.AppendLine("Japanese NTSC."); break; case 'U': IPBinInformation.AppendLine("North America NTSC."); break; case 'E': IPBinInformation.AppendLine("Europe PAL."); break; case ' ': break; default: IPBinInformation.AppendFormat("Game supports unknown region {0}.", region).AppendLine(); break; } int iPeripherals = int.Parse(Encoding.ASCII.GetString(ipbin.peripherals), NumberStyles.HexNumber); if((iPeripherals & 0x00000001) == 0x00000001) IPBinInformation.AppendLine("Game uses Windows CE."); IPBinInformation.AppendFormat("Peripherals:").AppendLine(); if((iPeripherals & 0x00000010) == 0x00000010) IPBinInformation.AppendLine("Game supports the VGA Box."); if((iPeripherals & 0x00000100) == 0x00000100) IPBinInformation.AppendLine("Game supports other expansion."); if((iPeripherals & 0x00000200) == 0x00000200) IPBinInformation.AppendLine("Game supports Puru Puru pack."); if((iPeripherals & 0x00000400) == 0x00000400) IPBinInformation.AppendLine("Game supports Mike Device."); if((iPeripherals & 0x00000800) == 0x00000800) IPBinInformation.AppendLine("Game supports Memory Card."); if((iPeripherals & 0x00001000) == 0x00001000) IPBinInformation.AppendLine("Game requires A + B + Start buttons and D-Pad."); if((iPeripherals & 0x00002000) == 0x00002000) IPBinInformation.AppendLine("Game requires C button."); if((iPeripherals & 0x00004000) == 0x00004000) IPBinInformation.AppendLine("Game requires D button."); if((iPeripherals & 0x00008000) == 0x00008000) IPBinInformation.AppendLine("Game requires X button."); if((iPeripherals & 0x00010000) == 0x00010000) IPBinInformation.AppendLine("Game requires Y button."); if((iPeripherals & 0x00020000) == 0x00020000) IPBinInformation.AppendLine("Game requires Z button."); if((iPeripherals & 0x00040000) == 0x00040000) IPBinInformation.AppendLine("Game requires expanded direction buttons."); if((iPeripherals & 0x00080000) == 0x00080000) IPBinInformation.AppendLine("Game requires analog R trigger."); if((iPeripherals & 0x00100000) == 0x00100000) IPBinInformation.AppendLine("Game requires analog L trigger."); if((iPeripherals & 0x00200000) == 0x00200000) IPBinInformation.AppendLine("Game requires analog horizontal controller."); if((iPeripherals & 0x00400000) == 0x00400000) IPBinInformation.AppendLine("Game requires analog vertical controller."); if((iPeripherals & 0x00800000) == 0x00800000) IPBinInformation.AppendLine("Game requires expanded analog horizontal controller."); if((iPeripherals & 0x01000000) == 0x01000000) IPBinInformation.AppendLine("Game requires expanded analog vertical controller."); if((iPeripherals & 0x02000000) == 0x02000000) IPBinInformation.AppendLine("Game supports Gun."); if((iPeripherals & 0x04000000) == 0x04000000) IPBinInformation.AppendLine("Game supports Keyboard."); if((iPeripherals & 0x08000000) == 0x08000000) IPBinInformation.AppendLine("Game supports Mouse."); if((iPeripherals & 0xEE) != 0) IPBinInformation.AppendFormat("Game supports unknown peripherals mask {0:X2}", iPeripherals & 0xEE); return IPBinInformation.ToString(); } } }