Add definitions for flooring & walls, minor m_card work

include/jaudio_NES/seqsetup.h

@@ -1,8 +1,18 @@
 #ifndef SEQSETUP_H
 #define SEQSETUP_H
 #include "types.h"
-extern "C"{
-    void Jaq_Reset(void);
-}
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct seqp seqp; // TODO
+
+void Jaq_Reset(void);
+void Jaq_SetSeqData(seqp* seqp, u8* param_2, u32 param_3, int param_4);
+
+#ifdef __cplusplus
+};
+#endif
 
 #endif