60 lines
1.4 KiB
C#
60 lines
1.4 KiB
C#
using System;
|
|
|
|
namespace VirtualNes.Core
|
|
{
|
|
public class APU_MMC5 : APU_INTERFACE
|
|
{
|
|
SYNCRECTANGLE sch0 = new SYNCRECTANGLE();
|
|
SYNCRECTANGLE sch1 = new SYNCRECTANGLE();
|
|
|
|
public override void Reset(float fClock, int nRate)
|
|
{
|
|
//todo : 实现
|
|
}
|
|
|
|
public override void Setup(float fClock, int nRate)
|
|
{
|
|
//todo : 实现
|
|
}
|
|
|
|
public override void Write(ushort addr, byte data)
|
|
{
|
|
//todo : 实现
|
|
}
|
|
|
|
public override int Process(int channel)
|
|
{
|
|
//todo : 实现
|
|
return 0;
|
|
}
|
|
|
|
internal void SyncWrite(ushort addr, byte data)
|
|
{
|
|
//todo : 实现
|
|
}
|
|
|
|
internal byte SyncRead(ushort addr)
|
|
{
|
|
byte data = 0;
|
|
|
|
if (addr == 0x5015)
|
|
{
|
|
if ((sch0.enable != 0) && sch0.vbl_length > 0) data |= (1 << 0);
|
|
if ((sch1.enable != 0) && sch1.vbl_length > 0) data |= (1 << 1);
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
public class SYNCRECTANGLE
|
|
{
|
|
// For sync
|
|
public byte[] reg = new byte[4];
|
|
public byte enable;
|
|
public byte holdnote;
|
|
public byte[] dummy = new byte[2];
|
|
public int vbl_length;
|
|
}
|
|
}
|
|
}
|