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by bughunter2
Mon Jun 22, 2009 3:20 am
Forum: In-depth High-tech BIOS section
Topic: What do you know about BIOS NVRAM hacking?
Replies: 82
Views: 235689

Acer5633

Hey,

After reading this thread for a while, I began poking around in the code of my BIOS, and found this in BIOSCOD6.ROM, at offset 0xCCAB:


mov ecx, 0x3a ; MSR 0x3a
rdmsr ; read the MSR
mov ebx, eax ; save low-order 32-bits of the MSR value
mov ax, 0x30f
call word 0xf000:0x3d40
jz skipVT ...