The prompt printed by ld
The prompt printed by ACL2 conveys information about various ``modes.'' See default-print-prompt and see ld-prompt for details.
The prompt in raw Lisp, including breaks from the ACL2 loop, can be
adjusted by ACL2 to include the string
(install-new-raw-prompt)
To return to printing the original Lisp prompt in raw lisp, evaluate the following in raw Lisp.
(install-old-raw-prompt)