tremble upon the NDMA implementation

that doesn't do much beyond getting stuck

src/DSi_NDMA.h

@@ -19,6 +19,78 @@
 #ifndef DSI_NDMA_H
 #define DSI_NDMA_H
 
-//
+#include "types.h"
+
+class DSi_NDMA
+{
+public:
+    DSi_NDMA(u32 cpu, u32 num);
+    ~DSi_NDMA();
+
+    void Reset();
+
+    void DoSavestate(Savestate* file);
+
+    void WriteCnt(u32 val);
+    void Start();
+
+    void Run();
+
+    void Run9();
+    void Run7();
+
+    bool IsInMode(u32 mode)
+    {
+        return ((mode == StartMode) && (Cnt & 0x80000000));
+    }
+
+    bool IsRunning() { return Running!=0; }
+
+    void StartIfNeeded(u32 mode)
+    {
+        if ((mode == StartMode) && (Cnt & 0x80000000))
+            Start();
+    }
+
+    void StopIfNeeded(u32 mode)
+    {
+        if (mode == StartMode)
+            Cnt &= ~0x80000000;
+    }
+
+    void StallIfRunning()
+    {
+        if (Executing) Stall = true;
+    }
+
+    u32 SrcAddr;
+    u32 DstAddr;
+    u32 TotalLength; // total length, when transferring multiple blocks
+    u32 BlockLength; // length of one transfer
+    u32 SubblockTimer; // optional delay between subblocks (only in round-robin mode)
+    u32 FillData;
+    u32 Cnt;
+
+private:
+    u32 CPU, Num;
+
+    u32 StartMode;
+    u32 CurSrcAddr;
+    u32 CurDstAddr;
+    u32 SubblockLength; // length transferred per run when delay is used
+    u32 RemCount;
+    u32 IterCount;
+    u32 TotalRemCount;
+    u32 SrcAddrInc;
+    u32 DstAddrInc;
+
+    u32 Running;
+    bool InProgress;
+
+    bool Executing;
+    bool Stall;
+
+    bool IsGXFIFODMA;
+};
 
 #endif // DSI_NDMA_H