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diff --git a/PicoDrive/Debug.cpp b/PicoDrive/Debug.cpp
new file mode 100644
index 0000000..49f53f6
--- /dev/null
+++ b/PicoDrive/Debug.cpp
@@ -0,0 +1,80 @@
+
+#include "stdafx.h"
+
+static int ScreenNum=0;
+
+int DebugScreenGrab()
+{
+  unsigned char *screen=NULL;
+  FILE *file=NULL;
+  unsigned char *line=NULL;
+  int x=0,y=0;
+  char filename[64];
+  unsigned char head[0x12];
+
+  memset(filename,0,sizeof(filename));
+  memset(head,0,sizeof(head));
+
+  // Allocate memory for one line
+  line=(unsigned char *)malloc(GXDisp.cxWidth*3); if (line==NULL) return 1;
+  memset(line,0,GXDisp.cxWidth*3);
+
+  // Get pointer to screen:
+  screen=(unsigned char *)GXBeginDraw(); if (screen==NULL) { free(line); return 1; }
+
+  // Open screenshot file:
+  for (;;)
+  {
+    sprintf(filename,"\\Screen%.3d.tga",ScreenNum);
+
+    // Does this file exist?
+    file=fopen(filename,"rb"); if (file==NULL) break; // No - use this
+    
+    // Exists, try next file
+    fclose(file); ScreenNum++;
+    if (ScreenNum>=1000) break;
+  }
+
+  // Use this filename
+  file=fopen(filename,"wb"); if (file==NULL) { GXEndDraw(); free(line); return 1; }
+
+  head[0x02]=0x02; //?
+  head[0x0c]=(unsigned char) GXDisp.cxWidth;
+  head[0x0d]=(unsigned char)(GXDisp.cxWidth>>8);
+  head[0x0e]=(unsigned char) GXDisp.cyHeight;
+  head[0x0f]=(unsigned char)(GXDisp.cyHeight>>8);
+  head[0x10]=24; // Number of bits per pixel
+
+  // Write header:
+  fwrite(head,1,sizeof(head),file);
+
+  for (y=0;y<(int)GXDisp.cyHeight;y++)
+  {
+    unsigned char *ps=NULL,*pd=NULL;
+    int ry=0;
+    int pix=0;
+
+    ry=GXDisp.cyHeight-y-1;
+    ps=screen+ry*GXDisp.cbyPitch;
+    pd=line;
+
+    // Copy pixel to our line buffer
+    for (x=0;x<(int)GXDisp.cxWidth; x++,ps+=GXDisp.cbxPitch,pd+=3)
+    {
+      pix=*(unsigned short *)ps;
+
+      pd[0]=(unsigned char)((pix&0x001f)<<3); // Red
+      pd[1]=(unsigned char)((pix&0x07e0)>>3); // Green
+      pd[2]=(unsigned char)((pix&0xf800)>>8); // Blue
+    }
+
+    fwrite(line,1,GXDisp.cxWidth*3,file);
+  }
+
+  fclose(file); file=NULL;
+  
+  GXEndDraw();
+  free(line);
+
+  return 0;
+}