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GBHawk: Add RockMan 8 mapper

This commit is contained in:
alyosha-tas 2018-03-30 21:56:32 -04:00
parent c829534170
commit 7a21f55c43
3 changed files with 80 additions and 5 deletions
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7
BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
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@ -641,6 +641,7 @@
</Compile>
<Compile Include="Consoles\Nintendo\GBA\VBARegisterHelper.cs" />
<Compile Include="Consoles\Nintendo\GBHawk\Audio.cs" />
<Compile Include="Consoles\Nintendo\GBHawk\Mappers\Mapper_RockMan8.cs" />
<Compile Include="Consoles\Nintendo\GBHawk\Mappers\Mapper_Sachen_MMC2.cs" />
<Compile Include="Consoles\Nintendo\GBHawk\Mappers\Mapper_Sachen_MMC1.cs" />
<Compile Include="Consoles\Nintendo\GBHawk\SerialPort.cs" />
@ -685,11 +686,11 @@
<Compile Include="Consoles\Nintendo\GBHawk\Mappers\Mapper_TAMA5.cs" />
<Compile Include="Consoles\Nintendo\GBHawk\MemoryMap.cs" />
<Compile Include="Consoles\Nintendo\GBHawk\PPU.cs" />
<Compile Include="Consoles\Nintendo\GBHawk\GBC_PPU.cs">
<DependentUpon>PPU.cs</DependentUpon>
<Compile Include="Consoles\Nintendo\GBHawk\GBC_PPU.cs">
<DependentUpon>PPU.cs</DependentUpon>
</Compile>
<Compile Include="Consoles\Nintendo\GBHawk\GB_PPU.cs">
<DependentUpon>PPU.cs</DependentUpon>
<DependentUpon>PPU.cs</DependentUpon>
</Compile>
<Compile Include="Consoles\Nintendo\GBHawk\Timer.cs" />
<Compile Include="Consoles\Nintendo\N64\N64SyncSettings.GLideN64.cs" />

9
BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBHawk.cs
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@ -367,6 +367,13 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
mapper = new MapperMBC1Multi();
}
// special case for bootlegs
if ((_rom.HashMD5(0, _rom.Length) == "CAE0998A899DF2EE6ABA8E7695C2A096"))
{
Console.WriteLine("Using RockMan 8 (Unlicensed) Mapper");
mapper = new MapperRM8();
}
Console.Write("Mapper: ");
Console.WriteLine(mppr);
@ -413,7 +420,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
if (cart_RAM != null)
{
Console.Write("RAM: "); Console.WriteLine(cart_RAM.Length);
for (int i = 0; i < cart_RAM.Length; i++)
@ -422,7 +428,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
}
}
// Extra RTC initialization for mbc3
if (mppr == "MBC3")
{

69
BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/Mappers/Mapper_RockMan8.cs Normal file
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@ -0,0 +1,69 @@
using BizHawk.Common;
using BizHawk.Common.NumberExtensions;
using System;
namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
{
// RockMan 8, just some simple bankswitching
public class MapperRM8 : MapperBase
{
public int ROM_bank;
public int ROM_mask;
public override void Initialize()
{
ROM_bank = 1;
ROM_mask = Core._rom.Length / 0x4000 - 1;
// some games have sizes that result in a degenerate ROM, account for it here
if (ROM_mask > 4) { ROM_mask |= 3; }
}
public override byte ReadMemory(ushort addr)
{
if (addr < 0x4000)
{
// lowest bank is fixed
return Core._rom[addr];
}
else if (addr < 0x8000)
{
return Core._rom[(addr - 0x4000) + ROM_bank * 0x4000];
}
else
{
return 0xFF;
}
}
public override byte PeekMemory(ushort addr)
{
return ReadMemory(addr);
}
public override void WriteMemory(ushort addr, byte value)
{
if ((addr >= 0x2000) && (addr < 0x4000))
{
value &= 0x1F;
if (value == 0) { value = 1; }
// in hhugboy they just subtract 8, but to me looks like bits 4 and 5 are just swapped (and bit 4 is unused?)
ROM_bank = ((value & 0xF) | ((value & 0x10) >> 1)) & ROM_mask;
}
}
public override void PokeMemory(ushort addr, byte value)
{
WriteMemory(addr, value);
}
public override void SyncState(Serializer ser)
{
ser.Sync("ROM_Bank", ref ROM_bank);
ser.Sync("ROM_Mask", ref ROM_mask);
}
}
}