IBM 2193 - Manual (Page 98)

6-20 IBM Personal Computer User Guide
If you set up a password for entering setup, you must type this password each time
you want to enter the Setup utility. If you do not type the correct password, you
cannot enter Setup.
If you set up a system password, you must type this password each time you power
on your system.
Refer to “Halt On” on page 6-15 for details on setting a system password and setup
password.