AxibugEmuOnline/AxibugEmuOnline.Client.PSVita/Assets/VirtualNes.Core/Mapper/Mapper178.cs

78 lines
2.3 KiB
C#
Raw Normal View History

2024-12-08 21:50:52 +08:00
//////////////////////////////////////////////////////////////////////////
// Mapper178 Education / WaiXing_FS305 //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using static VirtualNes.Core.CPU;
using INT = System.Int32;
using BYTE = System.Byte;
//using Codice.CM.Client.Differences;
namespace VirtualNes.Core
{
public class Mapper178 : Mapper
{
BYTE[] reg = new byte[3];
BYTE banknum;
BYTE OP_rom;
public Mapper178(NES parent) : base(parent)
{
}
public override void Reset()
{
reg[0] = 0;
reg[1] = 0;
reg[2] = 0;
banknum = 0;
SetBank_CPU();
OP_rom = 0;
uint crc = nes.rom.GetPROM_CRC();
if (crc == 0x925926BC //[ES-XXXX] Kou Dai Zuan Shi Zhi Chong Wu Xiao Jing Ling 2 (C)
|| crc == 0xB0B13DBD) //[ES-XXXX] Chong Wu Fei Cui Zhi Chong Wu Xiao Jing Ling IV (C)
{
OP_rom = 1;
}
}
//void Mapper178::WriteLow(WORD addr, BYTE data)
public override void WriteLow(ushort addr, byte data)
{
// if( addr >= 0x4000 && addr <= 0x5FFF ) DEBUGOUT("Address=%04X Data=%02X\n", addr&0xFFFF, data&0xFF );
if (addr == 0x4800)
{
if ((data & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
}
else if (addr == 0x4801)
{
reg[0] = (byte)((data >> 1) & 0x0F);
if (OP_rom!=0) reg[0] = (byte)(data << 2);
SetBank_CPU();
}
else if (addr == 0x4802)
{
reg[1] = (byte)(data << 2);
if (OP_rom!=0) reg[1] = data;
SetBank_CPU();
}
else if (addr == 0x4803)
{
//unknown
reg[2] = data;
}
else if (addr >= 0x6000)
{
CPU_MEM_BANK[addr >> 13][addr & 0x1FFF] = data;
}
}
void SetBank_CPU()
{
banknum = (byte)(reg[0] | reg[1]);
// DEBUGOUT("Bank=%02X\n", banknum&0xFF );
SetPROM_32K_Bank(banknum);
}
}
}