Message board for the users of flat assembler.
> OS Construction > Windows 8's locked bootloaders: much ado about nothing
Mike Gonta 10 Nov 2012, 20:48
x86 Windows 8 systems must also allow secure boot to be
turned off completely, so that no certificate verification
is performed at all.
UEFI allows the ability to drop back to mimicking BIOS,
to allow UEFI systems to start pre-UEFI operating systems.
This is done through a combination of running the "option ROMs"
embedded into many components, and Compatibility Support Modules
(CSMs) to hand over control to a legacy operating system.
Windows 8 machines using x86 processors can offer this kind
of backwards compatibility, but they must not invoke it without
explicit user action; in other words, this "BIOS mode" must
be explicitly enabled.
one man's journey of discovery in the-ideom
|10 Nov 2012, 20:48||
revolution 11 Nov 2012, 00:42
There is also this:
|11 Nov 2012, 00:42||
revolution 11 Nov 2012, 00:44
Only for x86 systems. For other systems (like ARM) it is the opposite where MS have mandated that the user cannot turn off secure boot.
Mike Gonta wrote:
much ado about nothing
|11 Nov 2012, 00:44||
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