mirror of
https://github.com/SabreTools/SabreTools.Serialization.git
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7689c6dd07
This change looks dramatic, but it's just separating out the already-split namespaces into separate top-level folders. In theory, every single one could be built into their own Nuget package. `SabreTools.Serialization` still builds the normal Nuget package that is used by all other projects and includes all namespaces.
104 lines
3.4 KiB
C#
104 lines
3.4 KiB
C#
namespace SabreTools.Data.Models.NES
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{
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/// <summary>
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/// NES 1.0 header information
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/// </summary>
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/// <see href="https://www.nesdev.org/wiki/INES"/>
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/// <remarks>
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/// Older versions of the iNES emulator ignored bytes 7-15, and several ROM management
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/// tools wrote messages in there. Commonly, these will be filled with "DiskDude!",
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/// which results in 64 being added to the mapper number.
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///
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/// A general rule of thumb: if the last 4 bytes are not all zero, and the header is
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/// not marked for NES 2.0 format, an emulator should either mask off the upper 4 bits
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/// of the mapper number or simply refuse to load the ROM.
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/// </remarks>
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public class CartHeader1 : CartHeader
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{
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// All common header parts take up bytes 0-7
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/// <summary>
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/// Size of PRG RAM in 8 KB units
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/// </summary>
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/// <remarks>
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/// Value 0 infers 8 KB for compatibility; see PRG RAM circuit.
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/// This was a later extension to the iNES format and not widely used.
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/// NES 2.0 is recommended for specifying PRG RAM size instead.
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/// </remarks>
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public byte PrgRamSize { get; set; }
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/// <summary>
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/// TV system (rarely used extension)
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/// </summary>
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/// <remarks>
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/// Though in the official specification, very few emulators honor this bit
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/// as virtually no ROM images in circulation make use of it.
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/// </remarks>
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public TVSystem TVSystem { get; set; }
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#region Byte 10
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/// <summary>
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/// TV system with extended values
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/// </summary>
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/// <remarks>
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/// Byte 10, Bits 0-1
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///
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/// This byte is not part of the official specification, and relatively
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/// few emulators honor it.
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/// </remarks>
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public TVSystemExtended TVSystemExtended { get; set; }
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/// <summary>
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/// Unknown reserved bits
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/// </summary>
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/// <remarks>
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/// Byte 10, Bits 2-3
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///
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/// This byte is not part of the official specification, and relatively
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/// few emulators honor it.
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/// </remarks>
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public byte Byte10ReservedBits23 { get; set; }
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/// <summary>
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/// PRG RAM ($6000-$7FFF) present
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/// </summary>
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/// <remarks>
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/// Byte 10, Bit 4
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///
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/// This byte is not part of the official specification, and relatively
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/// few emulators honor it.
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/// </remarks>
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public bool PrgRamPresent { get; set; }
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/// <summary>
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/// Board has bus conflicts
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/// </summary>
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/// <remarks>
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/// Byte 10, Bit 5
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///
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/// This byte is not part of the official specification, and relatively
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/// few emulators honor it.
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/// </remarks>
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public bool HasBusConflicts { get; set; }
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/// <summary>
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/// Unknown reserved bits
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/// </summary>
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/// <remarks>
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/// Byte 10, Bits 6-7
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///
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/// This byte is not part of the official specification, and relatively
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/// few emulators honor it.
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/// </remarks>
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public byte Byte10ReservedBits67 { get; set; }
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#endregion
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/// <summary>
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/// Unused padding to align to 16 bytes
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/// </summary>
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public byte[] Padding { get; set; } = new byte[5];
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}
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}
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