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Delete CartA16KR.cs

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alyosha-tas 2017-08-29 09:30:33 -04:00 committed by GitHub
parent 2efe19e4a9
commit 7a3d21a92c
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EMU7800/Core/CartA16KR.cs
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namespace EMU7800.Core
{
/// <summary>
/// Atari standard 16KB bankswitched carts with 128 bytes of RAM
/// </summary>
public sealed class CartA16KR : Cart
{
//
// Cart Format Mapping to ROM Address Space
// Bank1: 0x0000:0x1000 0x1000:0x1000 Bank selected by accessing 0x1ff9-0x1ff9
// Bank2: 0x1000:0x1000
// Bank3: 0x2000:0x1000
// Bank4: 0x3000:0x1000
// Shadows ROM
// 0x1000:0x0080 RAM write port
// 0x1080:0x0080 RAM read port
//
ushort BankBaseAddr;
readonly byte[] RAM;
int Bank
{
set { BankBaseAddr = (ushort)(value * 0x1000); }
}
#region IDevice Members
public override void Reset()
{
Bank = 0;
}
public override byte this[ushort addr]
{
get
{
addr &= 0x0fff;
if (addr < 0x0100 && addr >= 0x0080)
{
return RAM[addr & 0x7f];
}
UpdateBank(addr);
return ROM[BankBaseAddr + addr];
}
set
{
addr &= 0x0fff;
if (addr < 0x0080)
{
RAM[addr & 0x7f] = value;
return;
}
UpdateBank(addr);
}
}
#endregion
private CartA16KR()
{
}
public CartA16KR(byte[] romBytes)
{
LoadRom(romBytes, 0x4000);
Bank = 0;
RAM = new byte[0x80];
}
void UpdateBank(ushort addr)
{
if (addr < 0x0ff6 || addr > 0x0ff9)
{}
else
{
Bank = addr - 0x0ff6;
}
}
#region Serialization Members
public CartA16KR(DeserializationContext input, MachineBase m) : base(input)
{
input.CheckVersion(1);
LoadRom(input.ReadExpectedBytes(0x4000), 0x4000);
BankBaseAddr = input.ReadUInt16();
}
public override void GetObjectData(SerializationContext output)
{
base.GetObjectData(output);
output.WriteVersion(1);
output.Write(ROM);
output.Write(BankBaseAddr);
}
#endregion
}
}