#define CBOOT 0
#define WBOOT 1
#define CONST 2
#define CONIN 3
#define CONOUT 4
#define LIST 5
#define PUNCH 6
#define READER 7
#define HOME 8
#define SELDSK 9
#define SETTRK 10
#define SETSEC 11
#define SETDMA 12
#define READ 13
#define WRITE 14
#define LISTST 15
#define SECTRAN 16