91 lines
1.7 KiB
C#
91 lines
1.7 KiB
C#
//////////////////////////////////////////////////////////////////////////
|
|
// Mapper040 SMB2J //
|
|
//////////////////////////////////////////////////////////////////////////
|
|
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 Mapper040 : Mapper
|
|
{
|
|
BYTE irq_enable;
|
|
INT irq_line;
|
|
public Mapper040(NES parent) : base(parent)
|
|
{
|
|
}
|
|
|
|
|
|
public override void Reset()
|
|
{
|
|
irq_enable = 0;
|
|
irq_line = 0;
|
|
|
|
SetPROM_8K_Bank(3, 6);
|
|
SetPROM_32K_Bank(4, 5, 0, 7);
|
|
|
|
if (VROM_1K_SIZE != 0)
|
|
{
|
|
SetVROM_8K_Bank(0);
|
|
}
|
|
}
|
|
|
|
//void Mapper040::Write(WORD addr, BYTE data)
|
|
public override void Write(ushort addr, byte data)
|
|
{
|
|
switch (addr & 0xE000)
|
|
{
|
|
case 0x8000:
|
|
irq_enable = 0;
|
|
nes.cpu.ClrIRQ(IRQ_MAPPER);
|
|
break;
|
|
case 0xA000:
|
|
irq_enable = 0xFF;
|
|
irq_line = 37;
|
|
nes.cpu.ClrIRQ(IRQ_MAPPER);
|
|
break;
|
|
case 0xC000:
|
|
break;
|
|
case 0xE000:
|
|
SetPROM_8K_Bank(6, data & 0x07);
|
|
break;
|
|
}
|
|
}
|
|
|
|
//void Mapper040::HSync(INT scanline)
|
|
public override void HSync(int scanline)
|
|
{
|
|
if (irq_enable != 0)
|
|
{
|
|
if (--irq_line <= 0)
|
|
{
|
|
// nes.cpu.IRQ();
|
|
nes.cpu.SetIRQ(IRQ_MAPPER);
|
|
}
|
|
}
|
|
}
|
|
|
|
//void Mapper040::SaveState(LPBYTE p)
|
|
public override void SaveState(byte[] p)
|
|
{
|
|
//p[0] = irq_enable;
|
|
//*(INT*)&p[1] = irq_line;
|
|
}
|
|
|
|
//void Mapper040::LoadState(LPBYTE p)
|
|
public override void LoadState(byte[] p)
|
|
{
|
|
//irq_enable = p[0];
|
|
//irq_line = *(INT*)&p[1];
|
|
}
|
|
|
|
public override bool IsStateSave()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
}
|
|
}
|