IBM 560E manual Power-On Password, Selectable Drive-Startup Sequence, Reference

If you do not follow this procedure, the results are unpredictable.

Note: Whenever possible, use BIOS as an interface to reset the system microprocessor to the real mode. For more information about resetting the system microprocessor, referIBM toPersonalthe

System/2 and Personal Computer BIOS

Interface.

Power-On Password

RT/CMOS RAM	has	8	bytes reserved		for the power-on password
and the check character. The 8 bytes are initialized to								hex 00. The
microprocessor		can access		these	bytes only during POST. After
POST is completed, if a power-on					password	is installed,	the
password	bytes		are locked	and	cannot be	accessed by	any program.

During power-on password installation, the password (1 to 7 characters) is stored in the security space.

Installing the password is a function of the built-in system program Easy-Setup. The power-on password does not appear on the screen when it is installed, changed, or removed. After the power-on password has been installed, it can be changed or removed only during POST.

The computer also can have a keyboard password. For more

information, see the keyboard and auxiliary device controller section of theIBM Personal System/2 Hardware Interface Technical

Reference.

Selectable Drive-Startup Sequence

Selectable drive-startup (selectable boot) allows you to control									the
startup sequence of the drives				in	your	computer. The	order	in	which
the computer looks for the			drives		for your operating		system	is	the
drive-startup sequence. If you are working with multiple operating
systems, you might want to			change the drive-startup sequence					to
load	the operating	system	from	the	hard	disk without	first	checking
the	diskette drive,	or to	do	a remote		program load	(RPL).

ThinkPad 560/560E System Board 2-29