AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper099.cs
2024-08-04 23:37:02 +08:00

92 lines
1.6 KiB
C#

//////////////////////////////////////////////////////////////////////////
// Mapper099 VS-Unisystem //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using static VirtualNes.Core.CPU;
using INT = System.Int32;
using BYTE = System.Byte;
using System;
using Codice.CM.Client.Differences;
namespace VirtualNes.Core
{
public class Mapper099 : Mapper
{
BYTE coin;
public Mapper099(NES parent) : base(parent)
{
}
public override void Reset()
{
// set CPU bank pointers
if (PROM_8K_SIZE > 2)
{
SetPROM_32K_Bank(0, 1, 2, 3);
}
else if (PROM_8K_SIZE > 1)
{
SetPROM_32K_Bank(0, 1, 0, 1);
}
else
{
SetPROM_32K_Bank(0, 0, 0, 0);
}
// set VROM bank
if (VROM_1K_SIZE != 0)
{
SetVROM_8K_Bank(0);
}
coin = 0;
}
//BYTE Mapper099::ExRead(WORD addr)
public override byte ExRead(ushort addr)
{
if (addr == 0x4020)
{
return coin;
}
return (byte)(addr >> 8);
}
//void Mapper099::ExWrite(WORD addr, BYTE data)
public override void ExWrite(ushort addr, byte data)
{
if (addr == 0x4016)
{
if ((data & 0x04) != 0)
{
SetVROM_8K_Bank(1);
}
else
{
SetVROM_8K_Bank(0);
}
if (nes.rom.GetPROM_CRC() == 0xC99EC059)
{ // VS Raid on Bungeling Bay(J)
if ((data & 0x02) != 0)
{
nes.cpu.SetIRQ(IRQ_MAPPER);
}
else
{
nes.cpu.ClrIRQ(IRQ_MAPPER);
}
}
}
if (addr == 0x4020)
{
coin = data;
}
}
}
}