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deskryptor
2010 Dec 23
1
Report: Acer Travelmat stupid MBR check
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I have an Acer Travelmate and had the known ?Unregistered Exception
Handler? error at boot time.
Short Explanation:
The laptop starts up bios and when the bios wants to boot from any media
(not even your harddisk) the exception is thrown.
Reason:
The Diskcryptor MBR starts with 0xeb(jmp). The original M$ mbr starts with
0x33(xor ax,ax).
Some bioses(like mine) try to detect if a drive has a MBR or if it is a
removable drive without MBR.
Very simple here:
Sector0,Position0==0x33 => MBR => normal partitioned harddisk.
Sector0,Position0==0xeb => Boot...