--- /dev/null
+
+#ifndef OPS_H
+#define OPS_H
+
+#include "structures.h"
+
+extern void os8_file_name_pack(os8_file_name_t * filename, char * data);
+extern void os8_file_name_extract(os8_file_name_t * filename, char * data);
+extern unsigned char os8_ascii2pdp(unsigned char inchar);
+extern unsigned char os8_pdp2ascii(unsigned char inchar);
+extern p8word p8_neg(p8word in);
+extern p8word p8_twist(p8word in);
+#endif