BizHawk/BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Chip2114.cs

using BizHawk.Common;

namespace BizHawk.Emulation.Cores.Computers.Commodore64.MOS
{
	// used as Color RAM in C64
	public sealed class Chip2114
	{
		private int[] _ram = new int[0x400];

		public Chip2114()
		{
			HardReset();
		}

		public void HardReset()
		{
			for (var i = 0; i < 0x400; i++)
			{
				_ram[i] = 0x0;
			}
		}

		public int Peek(int addr)
		{
			return _ram[addr & 0x3FF];
		}

		public void Poke(int addr, int val)
		{
			_ram[addr & 0x3FF] = val & 0xF;
		}

		public int Read(int addr)
		{
			return _ram[addr & 0x3FF];
		}

		public int ReadInt(int addr)
		{
			return _ram[addr & 0x3FF];
		}

		public void SyncState(Serializer ser)
		{
			ser.Sync("_ram", ref _ram, useNull: false);
		}

		public void Write(int addr, int val)
		{
			_ram[addr & 0x3FF] = val & 0xF;
		}
	}
}