-//uint8 OPReadByte(uint32, uint32 who = UNKNOWN);
-//uint16 OPReadWord(uint32, uint32 who = UNKNOWN);
-//void OPWriteByte(uint32, uint8, uint32 who = UNKNOWN);
-//void OPWriteWord(uint32, uint16, uint32 who = UNKNOWN);
+#define OPFLAG_RELEASE 8 // Bus release bit
+#define OPFLAG_TRANS 4 // Transparency bit
+#define OPFLAG_RMW 2 // Read-Modify-Write bit
+#define OPFLAG_REFLECT 1 // Horizontal mirror bit