Using an invokable module (which you'd have to write), it is possible to detect
whether the key pressed is located on the keypad or the main keyboard, and
thereby distinguish (if you wish) between the RETURN key and the ENTER key. The
Standard Device Drivers manual provides information on how this is done,
particularly in Appendix G and in the chapter on the Console driver.
Also, Volume #1, Issue #1 of a magazine named "On Three" contains a program for
recognizing the difference between the ENTER and RETURN keys. You can obtain a
copy by writing to:
Attn: Order Dept.
P.O. Box 3825
Ventura, CA 93006
(805) 644-3514