OP_LIST		2	do_list
OP_FILE		1	do_file
OP_LINK		2	0
OP_RUN		1	start_child
OP_INPUT	1	0
OP_OUTPUT	1	0
OP_INTEGER	0	0
OP_REAL		0	0
OP_STRING	0	0
OP_NAME		0	0
OP_AT		0	0
OP_IN		1	0
OP_STOP		2	do_stop
OP_WHEN		3	do_stop
OP_CONT		2	do_continue
OP_STEP		0	do_step
OP_NEXT		0	do_next
OP_REGS		0	do_regs
OP_WHERE	0	do_where
OP_STATUS	0	do_status
OP_DELETE	0	do_delete
OP_SELECT	2	0
OP_SET		2	do_set
OP_PRINT	1	do_print
OP_DUMP		0	do_dump
OP_RESTORE	0	do_restore
OP_TRACE	3	do_trace
OP_FIND		1	do_find
OP_DISPLAY	1	add_to_item_list
OP_WHICH	1	do_which
OP_UNOP		1	0
OP_BINOP	2	0