forked from sin365/AxibugEmuOnline
116 lines
3.7 KiB
C#
116 lines
3.7 KiB
C#
//////////////////////////////////////////////////////////////////////////
|
|
// Mapper235 150-in-1 //
|
|
//////////////////////////////////////////////////////////////////////////
|
|
using static VirtualNes.MMU;
|
|
using BYTE = System.Byte;
|
|
using INT = System.Int32;
|
|
|
|
|
|
namespace VirtualNes.Core
|
|
{
|
|
public class Mapper235 : Mapper
|
|
{
|
|
public Mapper235(NES parent) : base(parent)
|
|
{
|
|
}
|
|
|
|
public override void Reset()
|
|
{
|
|
for (INT i = 0; i < 0x2000; i++)
|
|
{
|
|
DRAM[i] = 0xFF;
|
|
}
|
|
|
|
SetPROM_32K_Bank(0);
|
|
}
|
|
|
|
//void Mapper235::Write(WORD addr, BYTE data)
|
|
public override void Write(ushort addr, byte data)
|
|
{
|
|
{
|
|
BYTE prg = (byte)(((addr & 0x0300) >> 3) | (addr & 0x001F));
|
|
BYTE bus = 0;
|
|
|
|
if (PROM_8K_SIZE == 64 * 2)
|
|
{
|
|
// 100-in-1
|
|
switch (addr & 0x0300)
|
|
{
|
|
case 0x0000: break;
|
|
case 0x0100: bus = 1; break;
|
|
case 0x0200: bus = 1; break;
|
|
case 0x0300: bus = 1; break;
|
|
}
|
|
}
|
|
else if (PROM_8K_SIZE == 128 * 2)
|
|
{
|
|
// 150-in-1
|
|
switch (addr & 0x0300)
|
|
{
|
|
case 0x0000: break;
|
|
case 0x0100: bus = 1; break;
|
|
case 0x0200: prg = (byte)((prg & 0x1F) | 0x20); break;
|
|
case 0x0300: bus = 1; break;
|
|
}
|
|
}
|
|
else if (PROM_8K_SIZE == 192 * 2)
|
|
{
|
|
// 150-in-1
|
|
switch (addr & 0x0300)
|
|
{
|
|
case 0x0000: break;
|
|
case 0x0100: bus = 1; break;
|
|
case 0x0200: prg = (byte)((prg & 0x1F) | 0x20); break;
|
|
case 0x0300: prg = (byte)((prg & 0x1F) | 0x40); break;
|
|
}
|
|
}
|
|
else if (PROM_8K_SIZE == 256 * 2)
|
|
{
|
|
}
|
|
|
|
if ((addr & 0x0800) != 0)
|
|
{
|
|
if ((addr & 0x1000) != 0)
|
|
{
|
|
SetPROM_8K_Bank(4, prg * 4 + 2);
|
|
SetPROM_8K_Bank(5, prg * 4 + 3);
|
|
SetPROM_8K_Bank(6, prg * 4 + 2);
|
|
SetPROM_8K_Bank(7, prg * 4 + 3);
|
|
}
|
|
else
|
|
{
|
|
SetPROM_8K_Bank(4, prg * 4 + 0);
|
|
SetPROM_8K_Bank(5, prg * 4 + 1);
|
|
SetPROM_8K_Bank(6, prg * 4 + 0);
|
|
SetPROM_8K_Bank(7, prg * 4 + 1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
SetPROM_32K_Bank(prg);
|
|
}
|
|
|
|
if (bus != 0)
|
|
{
|
|
SetPROM_Bank(4, DRAM, BANKTYPE_ROM);
|
|
SetPROM_Bank(5, DRAM, BANKTYPE_ROM);
|
|
SetPROM_Bank(6, DRAM, BANKTYPE_ROM);
|
|
SetPROM_Bank(7, DRAM, BANKTYPE_ROM);
|
|
}
|
|
|
|
if ((addr & 0x0400) != 0)
|
|
{
|
|
SetVRAM_Mirror(VRAM_MIRROR4L);
|
|
}
|
|
else if ((addr & 0x2000) != 0)
|
|
{
|
|
SetVRAM_Mirror(VRAM_HMIRROR);
|
|
}
|
|
else
|
|
{
|
|
SetVRAM_Mirror(VRAM_VMIRROR);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} |