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Delete Cart78SG.cs

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alyosha-tas 2017-08-29 09:30:01 -04:00 committed by GitHub
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commit eb622c5bbd
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EMU7800/Core/Cart78SG.cs
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namespace EMU7800.Core
{
/// <summary>
/// Atari 7800 SuperGame bankswitched cartridge
/// </summary>
public sealed class Cart78SG : Cart
{
//
// Cart Format Mapping to ROM Address Space
// Bank0: 0x00000:0x4000
// Bank1: 0x04000:0x4000 0x4000:0x4000 Bank6
// Bank2: 0x08000:0x4000 0x8000:0x4000 Bank0-7 (0 on startup)
// Bank3: 0x0c000:0x4000 0xc000:0x4000 Bank7
// Bank4: 0x10000:0x4000
// Bank5: 0x14000:0x4000
// Bank6: 0x18000:0x4000
// Bank7: 0x1c000:0x4000
//
readonly int[] Bank = new int[4];
readonly byte[] RAM;
#region IDevice Members
public override byte this[ushort addr]
{
get
{
var bankNo = addr >> 14;
if (RAM != null && bankNo == 1)
{
return RAM[addr & 0x3fff];
}
return ROM[ (Bank[bankNo] << 14) | (addr & 0x3fff) ];
}
set
{
var bankNo = addr >> 14;
if (bankNo == 2)
{
Bank[2] = value & 7;
}
else if (RAM != null && bankNo == 1)
{
RAM[addr & 0x3fff] = value;
}
}
}
#endregion
private Cart78SG()
{
}
public Cart78SG(byte[] romBytes, bool needRAM)
{
if (needRAM)
{
// This works for titles that use 8KB instead of 16KB
RAM = new byte[0x4000];
}
Bank[1] = 6;
Bank[2] = 0;
Bank[3] = 7;
LoadRom(romBytes, 0x20000);
}
#region Serialization Members
public Cart78SG(DeserializationContext input, MachineBase m) : base(input)
{
var version = input.CheckVersion(1, 2);
LoadRom(input.ReadBytes());
Bank = input.ReadIntegers(4);
if (version == 1)
input.ReadInt32();
RAM = input.ReadOptionalBytes(0x4000);
}
public override void GetObjectData(SerializationContext output)
{
base.GetObjectData(output);
output.WriteVersion(2);
output.Write(ROM);
output.Write(Bank);
output.WriteOptional(RAM);
}
#endregion
}
}