typedef struct
	{
	 char * mnemonic;
	 int opcode;
	 int format;
	 void (*processor)(int index, int pass);
	 char d;
	 boolean propagate;
	} op;

extern op optable[];

#define op_A 1
#define op_B 2
#define op_d 4
#define op_U 8
#define op_I 16