HP ProBook 4520s Maintenance And Service Manual page 125

Select
Device Configurations
To do this
●
Enable/disable USB legacy support (enabled by default).
When enabled, USB legacy support allows the following:
◦
Use of a USB keyboard in Computer Setup even
when a Windows operating system is not running.
◦
Startup from bootable USB devices, including a
hard drive, diskette drive, or optical drive
connected by a USB port to the computer.
●
Select a parallel port mode: ECP (Enhanced Capabilities
Port), standard, bidirectional, or EPP (Enhanced Parallel
Port).
●
Enable/disable fan always on while connected to an AC
outlet (enabled by default).
●
Enable/disable Data Execution Prevention (select models
only). When enabled, the processor can disable some
virus code execution, which helps to improve computer
security (enabled by default).
●
Select a SATA (Serial Advanced Technology Attachment)
device mode. The following options are available:
◦
AHCI (Advanced Host Controller Interface)
◦
IDE (Integrated Drive Electronics)
◦
RAID (Redundant Array of Independent Disks) (select
models only)
Computer Setup 117