ADLINK aTCA-6200A - Manual (Page 76)

76
Onboard SAS Oprom
This item allows user to enable or disable SAS option ROM.
Onboard SATA RAID Oprom
This item allows user to enable or disable SATA RAID option ROM.
High Precision Timer
The High Precision Event Timer is a hardware timer used in personal computers. A High
Precision Event Timer chip consists of a 64-bit main counter counting at least at 10MHz and
a set of up to 256 comparators. HPET is programmed via a memory mapped I/O window that
is discoverable via ACPI. The HPET circuit in modern PCs is integrated into the southbridge.
The HPET can produce periodic interrupts at a much higher resolution than the RTC.
This option allows user to enable or disable High Precision Event Timer.
6.4.2.1 PCI Express Ports Configuration
You can use this screen to specify options for the PCI Express Ports configuration settings.
Use the up and down keys to select an item. Use <+> and <-> keys to change the
value of the selected option. The settings are described in the following pages. The screen is
shown as below.