add regdump

snes/regdump/debug.h

@@ -0,0 +1,8 @@
+#include "data.h"
+
+void debug_init(void);
+void debug_enable(void);
+void printfs(word y, const char *fmt, ...);
+void printfc(const char *fmt, ...);
+void clears(void);
+void printc_packet(unsigned long addr, unsigned int len, byte * packet);