using System.IO;

namespace MyNes.Core;

[BoardInfo("Jaleco Early Mapper 1", 92)]
internal class Mapper092 : Board
{
	private int chr_reg;

	private int prg_reg;

	internal override void HardReset()
	{
		base.HardReset();
		Switch16KPRG(0, PRGArea.Area8000);
		chr_reg = (prg_reg = 0);
	}

	internal override void WritePRG(ref ushort address, ref byte data)
	{
		switch ((data >> 6) & 3)
		{
		case 0:
			Switch08KCHR(chr_reg);
			Switch16KPRG(prg_reg, PRGArea.AreaC000);
			break;
		case 1:
			chr_reg = data & 0xF;
			break;
		case 2:
			prg_reg = data & 0xF;
			break;
		}
	}

	internal override void WriteStateData(ref BinaryWriter stream)
	{
		base.WriteStateData(ref stream);
		stream.Write(chr_reg);
		stream.Write(prg_reg);
	}

	internal override void ReadStateData(ref BinaryReader stream)
	{
		base.ReadStateData(ref stream);
		chr_reg = stream.ReadInt32();
		prg_reg = stream.ReadInt32();
	}
}