I am in dire need of overwriting a locked register named DIMM Memory Technology register (link ).
My objective is to disable a rank selectively.
Page No 427.
The field positions are marked as RW-LB. Indicating that one can bypass them provided lock bypass
bits are enabled. I am very sure that the BIOS does write to those fields because I can observe the
values being changed each time I change my memory configuration by a difeerent DIMM layout.
My problem is that nowehere have I found a way to do so. Even the manual just mentions it but
does not describe it.
One post having the same question has been unanswered for a long time. If its confidential,
I would welcome if any one would let me know that or otherwise any help will be deeply appreciated
I don't know of any way to override the bits if they are locked. Usually if someone needs to do this sort of thing, they have to get BIOS folks to create a special BIOS that doesn't lock the bits or maybe they add a BIOS boot setup screen which allows you to change the settings at boot time.
Getting a special bios is a very difficult thing to do and requires a lot of justification.