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BizHawk/BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/mF4.cs

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Move Buffer.cs and Util.cs from BizHawk.Emulation to BizHawk.Common, and add 1234832983 usings
2013-11-04 00:36:15 +00:00
using BizHawk.Common;
cleaning up some Bizhawk.Emulation namespaces
2013-11-13 03:32:25 +00:00
namespace BizHawk.Emulation.Cores.Atari.Atari2600
Atari - go ahead and hook up empty mappers for all 20 mappers
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{
Atari - put descriptions at the top of each mapper file
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/*
F4 (Atari style 32K)
-----
Again, this works like F8 and F6 except now there's 8 4K banks. Selection is performed
by accessing 1FF4 through 1FFB.
*/
Atari 2600 - throw NotImplemented exceptions on mappers that exist but haven't been built, and clean up some mapper code
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internal class mF4 :MapperBase
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{
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int toggle;
Atari - implement mapper F4
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Atari 2600 - implement TIA, PIA, and System Bus domains (note that there is no poke ability on the system bus domain at this time)
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private byte ReadMem(ushort addr, bool peek)
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{
Atari 2600 - implement TIA, PIA, and System Bus domains (note that there is no poke ability on the system bus domain at this time)
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if (!peek)
{
Address(addr);
}
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if (addr < 0x1000) return base.ReadMemory(addr);
last round of pointless code cleanup
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return core.rom[(toggle << 12) + (addr & 0xFFF)];
Atari - implement mapper F4
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}
Atari 2600 - implement TIA, PIA, and System Bus domains (note that there is no poke ability on the system bus domain at this time)
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public override byte ReadMemory(ushort addr)
{
return ReadMem(addr, false);
}
public override byte PeekMemory(ushort addr)
{
return ReadMem(addr, true);
}
Atari - implement mapper F4
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public override void WriteMemory(ushort addr, byte value)
{
Address(addr);
if (addr < 0x1000) base.WriteMemory(addr, value);
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("toggle", ref toggle);
}
void Address(ushort addr)
{
if (addr == 0x1FF4) toggle = 0;
if (addr == 0x1FF5) toggle = 1;
if (addr == 0x1FF6) toggle = 2;
if (addr == 0x1FF7) toggle = 3;
if (addr == 0x1FF8) toggle = 4;
if (addr == 0x1FF9) toggle = 5;
if (addr == 0x1FF9) toggle = 5;
if (addr == 0x1FFA) toggle = 6;
if (addr == 0x1FFB) toggle = 7;
}
Atari - go ahead and hook up empty mappers for all 20 mappers
2012-03-31 20:53:14 +00:00
}
}