Asus A55BM-PLUS - Manual (Page 63)

ASUS A55BM-PLUS 2-31
2.8.8 CSM (Compatibility Support Module)
Allows you to configure the CSM (Compatibility Support Module) items to fully support the
various VGA, bootable devices and add-on devices for better compatibility.
Launch CSM [Enabled]
[Auto] The system automatically detects the bootable devices and the add-on
devices.
[Enabled] For better compatibility, enable the CSM to fully support the non-UEFI
driver add-on devices or the Windows ® UEFI mode.
[Disabled] Disable the CSM to fully support the Windows ® Security Update and
Security Boot.
The following four items appear when you set Launch CSM to [Enabled].
Boot Device Control [UEFI and Legacy OpROM]
Allows you to select the type of devices that you want to boot up. Configuration options:
[UEFI and Legacy OpROM] [Legacy OpROM only] [UEFI only]
Boot from Network Devices [Legacy OpROM first]
Allows you to select the type of network devices that you want to launch. Configuration
options: [Legacy OpROM first] [UEFI driver first] [Ignore]
Boot from Storage Devices [Legacy OpROM first]
Allows you to select the type of storage devices that you want to launch. Configuration
options: [Both, Legacy OpROM first] [Both, UEFI first] [Legacy OpROM first] [UEFI driver first]
[Ignore]
Boot from PCIe/PCI Expansion Devices [Legacy OpROM first]
Allows you to select the type of PCIe/PCI expansion devices that you want to launch.
Configuration options: [Legacy OpROM first] [UEFI driver first]
2.8.9 Secure Boot
Allows you to configure the Windows ® Secure Boot settings and manage its keys to protect
the system from unauthorized access and malwares during POST.
OS Type [Windows UEFI mode]
Allows you to select your installed operating system.
[Windows UEFI mode]
Executes the Microsoft ® Secure Boot check. Only
select this option when booting on Windows ® UEFI
mode or other Microsoft ® Secure Boot compliant OS.
[Other OS] Get the optimized function when booting on
Windows ® non-UEFI mode, Windows ® Vista/XP,
or other Microsoft ® Secure Boot non-compliant
OS. Only on Windows ® UEFI mode that Microsoft ®
Secure Boot can function properly.