DFI G5C900-B - Manual (Page 43)

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COM Express Board
Gate A20 Option
This entry allows you to select how gate A20 is handled. Gate A20
is a device used to address memory above 1 Mbyte. Initially, gate A20
was handled via the keyboard controller. Today, while keyboards still
provide this support, it is more common, and much faster, for the sys-
tem chipset to provide support for gate A20.
Security Option
This field determines when the system will prompt for the password
- everytime the system boots or only when you enter the BIOS
setup. Set the password in the Set Supervisor/User Password
submenu.
System The system will not boot and access to Setup will be
denied unless the correct password is entered at the
prompt.
Setup The system will boot, but access to Setup will be denied
unless the correct password is entered at the prompt.
APIC Mode
Leave this field in its default setting.
MPS Version Control for OS
This field is used to select the MPS version used by the system.
OS Select for DRAM > 64MB
This field allows you to access the memory that is over 64MB in
OS/2. The options are: Non-OS2 and OS2.
Small Logo(EPA) Show
Enabled The EPA logo will appear during system boot-up.
Disabled The EPA logo will not appear during system boot-up.