72 lines
1.4 KiB
C#
72 lines
1.4 KiB
C#
//////////////////////////////////////////////////////////////////////////
|
|
// Mapper175 15-in-1 (Kaiser) //
|
|
//////////////////////////////////////////////////////////////////////////
|
|
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 Mapper175 : Mapper
|
|
{
|
|
BYTE reg_dat;
|
|
public Mapper175(NES parent) : base(parent)
|
|
{
|
|
}
|
|
|
|
public override void Reset()
|
|
{
|
|
SetPROM_16K_Bank(4, 0);
|
|
SetPROM_16K_Bank(6, 0);
|
|
reg_dat = 0;
|
|
|
|
if (VROM_1K_SIZE != 0)
|
|
{
|
|
SetVROM_8K_Bank(0);
|
|
}
|
|
}
|
|
|
|
//void Mapper175::Read(WORD addr, BYTE data)
|
|
public override void Read(ushort addr, byte data)
|
|
{
|
|
if (addr == 0xFFFC)
|
|
{
|
|
SetPROM_16K_Bank(4, reg_dat & 0x0F);
|
|
SetPROM_8K_Bank(6, (reg_dat & 0x0F) * 2);
|
|
}
|
|
}
|
|
|
|
//void Mapper175::Write(WORD addr, BYTE data)
|
|
public override void Write(ushort addr, byte data)
|
|
{
|
|
switch (addr)
|
|
{
|
|
case 0x8000:
|
|
if ((data & 0x04) != 0)
|
|
{
|
|
SetVRAM_Mirror(VRAM_HMIRROR);
|
|
}
|
|
else
|
|
{
|
|
SetVRAM_Mirror(VRAM_VMIRROR);
|
|
}
|
|
break;
|
|
case 0xA000:
|
|
reg_dat = data;
|
|
SetPROM_8K_Bank(7, (reg_dat & 0x0F) * 2 + 1);
|
|
SetVROM_8K_Bank(reg_dat & 0x0F);
|
|
break;
|
|
}
|
|
}
|
|
|
|
public override bool IsStateSave()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
}
|
|
}
|