- options be changed to use the <STRONG>-m</STRONG> option instead. The <STRONG>-n</STRONG>
- option remains, but has no effect. The <STRONG>-adnp</STRONG> options are
- therefore omitted from the usage summary above.
-
- It is still permissible to specify the <STRONG>-e</STRONG>, <STRONG>-i</STRONG>, and <STRONG>-k</STRONG>
- options without arguments, although it is strongly recom-
- mended that such usage be fixed to explicitly specify the
+ options be changed to use the <STRONG>-m</STRONG> option instead. The <STRONG>-a</STRONG>,
+ <STRONG>-d</STRONG>, and <STRONG>-p</STRONG> options are therefore omitted from the usage
+ summary above.
+
+ Very old systems, e.g., 3BSD, used a different terminal
+ driver which was replaced in 4BSD in the early 1980s. To
+ accommodate these older systems, the 4BSD <STRONG>tset</STRONG> provided a
+ <STRONG>-n</STRONG> option to specify that the new terminal driver should
+ be used. This implementation does not provide that
+ choice.
+
+ It is still permissible to specify the <STRONG>-e</STRONG>, <STRONG>-i</STRONG>, and <STRONG>-k</STRONG>
+ options without arguments, although it is strongly recom-
+ mended that such usage be fixed to explicitly specify the