IBM 6C1 Service Manual page 246

A password becomes effective only after the system is turned off and back on again.
Attention:
been enabled, you are asked for the power-on-access password at startup every time
you boot your system.
Remote Mode
Privileged-Access Password
Enter Password
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Service Guide
If no user-defined bootlist exists and the power-on-access password has
Remote Mode: The remote mode, when enabled, allows
the system to start from the defined boot device. This
mode is ideal for network servers and other system units
that operate unattended. When the remote mode is set,
the icon label changes to Remote <On>
Note: To use the remote mode feature for booting
unattended devices, you must enable the unattended start
mode. See the "System Power Control Menu" on
page 192 for instructions on enabling the unattended start
mode, which allows the system unit to turn on whenever
ac power is applied to the system (instead of having the
system unit wait for the power button to be pushed).
The privileged-access password protects against the
unauthorized starting of the system programs. Select the
Set icon to set and verify the privileged-access password.
When you select the Set icon, a screen with eight empty
boxes displays. Type your password in these boxes. You
can use any combination of up to eight characters (A-Z,
a-z, and 0-9) for your password. As you type a character,
a key displays in the box.