Asus RS700-E10-RS12U User Manual - Page 155
CSM (Compatibility Support Module), Boot Device Control [UEFI and Legacy]
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5.6.12 CSM (Compatibility Support Module) Launch CSM [Disabled] Allows you to enable or disable CSM (Compatibility Support Module) Support. [Enabled] For a 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 secure update and secure boot. The following items appear only when Launch CSM is set to [Enabled]. GateA20 Active [Upon Request] Allows you to set the GA20 option. [Upon Request] GA20 can be disabled using BIOS services. [Always] Do not allow GA20 disabling; this option is useful when any RT code is executed above 1MB. Interrupt 19 Capture [Immediate] Allows you to select the BIOS reaction on INT19 trapping by Option ROM. [Immediate] Execute the trap right away. [Postponed] Execute the trap during legacy boot. [Auto] Auto HDD Connection Order [Adjust] Allows you to select the HDD Connection Order. Some OS require HDD handles to be adjusted, i.e. OS is installed on drive 80h. Configuration options: [Adjust] [Keep] Boot Device Control [UEFI and Legacy] Allows you to select the devices boot-up mode according to the devices specification. Devices with the selected mode will in the boot priority list. Configuration options: [UEFI and Legacy] [Legacy only] [UEFI only] Option ROM execution Boot from Network Devices [UEFI only] Allows you to select the type of onboard LAN controller and installed LAN cards. Network devices will run the selected type during the system boot. Selecting [Ignore] will accelerate the boot up time without running network devices during POST (Power-On Self-Test). Configuration options: [Ignore] [UEFI only] [Legacy only] ASUS RS700-E10 Series 5-23