Fitlet BIOS guide - fit-PC wiki (2024)

Overview

• See what is BIOS
• fitlet BIOS is based on American Megatrends Inc. (AMI) BIOS.
• BIOS can be accessed by pressing Del during power up cycle.
• For BIOS reset instructions refer to fitlet troubleshooting

BIOS Menu

Main

The screen provides date, time and boot features settings, as well as basic system information:

• BIOS Vendor: American Megatrends
• Core Version: 4.6.5.4
• Compliancy: UEFI 2.3.1; PI 1.2
• BIOS Version: Format SBCFLT_X.XX.XX_X - useful to check if you have the latest BIOS installed
• Build Date and Time: MM/DD/YYYY HH:MM:SS
• System Date: HH:MM:SS
• System Time: Weekday MM/DD/YYYY
• Access Level: Administrator

Advanced

The section provides advanced system features and functionality settings.
Warning: For advanced users only. Setting items to incorrect values may cause system to malfunction.

PCI Settings

PCI, PCI-X and PCI Express settings:

• PCI Latency Timer: Value to be programmed into PCI latency timer register.
• VGA Palette Snoop: Enables or Disables VGA palette registers snooping.
• PERR# Generation: Enables or Disables PCI device to generate PERR#.
• SERR# Generation: Enables or Disables PCI device to generate SERR#.
• Relaxed Ordering: Enables or Disables PCI Express device relaxed ordering.
• Extended Tag: If enabled allows device to use 8-bit tag field as a requester.
• No Snoop: Enables or Disables PCI Express device no snoop option.
• Maximum Payload: Set maximum payload of PCI Express device or allow system BIOS to select the value automatically.
• Maximum Read Request: Set maximum read request size of PCI Express device or allow system BIOS to select the value automatically.
• ASPM Support: Set the ASPM (Active State Power Management) level:
  • Force L0s - force all links to L0s state
  • Auto - BIOS auto configure
  • Disable - disables ASPM
• Extended Synch: If enabled allows generation of extended synchronization patterns.
• Link Training Retry: Defines number of retry attempts SW will take to retrain the link if previous attempt was unsuccessful.
• Link Training Timeout (uS): Defines number of microseconds SW will wait before polling "Link Training" bit in link status register. Value range 10-10000 us.
• Restore PCIE Registers: On non-PCI Express aware OS's (Pre Windows Vista) some devices may not be correctly reinitialized after S3 (sleep state). Enabling this restores PCI Express device configurations on S3 resume. Warning: Enabling this may cause issues with other HW after S3 resume.

Power Settings

System ACPI and power management policy parameters:

• ACPI Auto Configuration: Enables or Disables BIOS ACPI (power management policy) auto configuration.
• Hibernation State: Enables or Disables system ability to Hibernate (S4). This option may be not effective with some OS.
• Sleep State: Select ACPI sleep state the system will enter when Suspend/Power button is pressed.
• Lock Legacy Resources: Enables or Disables lock of legacy resources.
• Restore on AC Power Loss: Set the way fitlet is turned-on after power failure/interruption occurred or the moment power cable is plugged. The available options are:
  • Power On - system powers on automatically
  • Power Off - system remains off
  • Last State - based on system state before the failure it will be either On or Off
  • Disable - the feature is disabled
• APU TDP: Set processor maximum power consumption (thermal design power). Enter values between 1-25000 [mW], when default value is 4500 [mW]. Higher value means better performance, that may result in higher temperature.

TPM Settings

Note: TPM module is not assembled by default. The option relevant in high volume orders.

Trusted platform module settings:

• Security Device Support: Enables or Disables BIOS support for security device. OS will not show security device. TCG EFI protocol and INT1A interface will not be available.

CPU Settings

CPU configuration parameters:

• PSS Support: Enable or Disable the generation of ACPI _PPC, _PPS and _PCT objects.
• PSTATE Adjustment: Provide to adjust start-up P-state level.
• NX Mode: Enable or Disable non-execute page protection function.
• SVM Mode: Enable or Disable CPU virtualization.
• C6 Mode: Enable or Disable C6 state.
• CPB Mode: Auto or Disable core performance boost.
• Core Leveling Mode: Change the number of Cores in the system.

Video Settings

• Integrated Graphics: Enable or Disable integrated graphics controller.
• UMA Frame Buffer Size: Set frame buffer size (32MB-2GB).
• Remote Display Feature: Enable or Disable remote display feature support.
• HDMI Audio: Enable or Disable Gnb HD audio support.
• IOMMU: Enable or Disable IOMMU support.
• PSPP Policy: Configure PCI Express speed power policy:
  • Disabled
  • Performance
  • Balanced-High
  • Balanced-Low
  • Power saving

SATA Settings

Storage devices interface configuration:

• OnChip SATA Channel: Enable or Disable SATA channel for storage devices.
• OnChip SATA Type: Set SATA host controller interface type for storage devices communication.
  • Native IDE
  • AHCI
  • Legacy IDE
  • AHCI as ID 7804
• OnChip IDE Mode: Set old standard IDE mode, either legacy or native.
• SATA IDE Combined Mode: Enabled or Disabled IDE combined mode.

Memory Settings

• Memory Clock: This option allows user to select different memory clock. Can be set to Auto detection or manually selected.
• Memory Clear: Memory clear functionality control.

Memory Configuration

• Memory Hole Remapping: Enable or Disable memory hole remapping.
• Bank Interleaving: Enable or Disable bank interleaving.
• Memory Hole 15MB – 16MB: Enable or Disable memory hole 15MB-16MB for some ISA expansion cards.
• Socket Information: Basic information about memory SO-DIMM used.

SDIO Settings

SD/SDIO configuration parameters:

• SDIO Access Mode: Set SD device access mode:
  • Auto - Access SD device in DMA mode if controller support it, otherwise in PIO mode.
  • DMA - Access SD device in DMA mode.
  • PIO - Access SD device in PIO (programmed input/output) mode.
• Mass Storage Device Emulation Type: TBD

USB Settings

• Legacy USB Support: Enables legacy USB support. Auto option disables legacy support if no USB devices are connected. Disabled option will keep USB devices available only for EFI applications.
• XHCI Hand-off: Workaround for OS without XHCI hand-off support. The XHCI ownership change should be claimed by XHCI driver.
• EHCI Hand-off: Workaround for OS without EHCI hand-off support. The EHCI ownership change should be claimed by EHCI driver.
• USB Mass Storage Driver Support: Enable or Disable USB mass storage driver support.
• Port 60/64 Emulation: Enable I/O port 60h/64h emulation support. This option should be enabled for the complete USB keyboard legacy support for non-USB aware operating systems.
• USB transfer timeout: Timeout value for control, bulk and interrupt transfers - 1 sec, 5 sec, 10 sec or 20 sec.
• Device reset timeout: USB mass storage device start unit command time-out.
• Device power-up delay: Maximum time the device will take before it properly reports itself to the Host Controller.
  • Auto - uses default value: for a root port it is 100 ms, for a hub port the delay is taken from the hub descriptor.

Boot

• Setup Prompt Timeout: Number of seconds to wait for setup activation key. 65535 (0xFFFF) means indefinite waiting.
• Bootup Numlock State: Select the keyboard NumLock state.
• Quiet Boot: Enables or Disables quiet boot option.
• Fast Boot: Enables or Disables boot with initialization of a minimal set of devices required to launch active boot option. Has no effect for BBS boot option.
• SATA Support: TBD
• VGA Support: TBD
• USB Support: TBD
• PS2 Device Support: If disabled PS2 device will be skipped.
• Network Stack Driver Support: If disabled Network Stack driver will be skipped.
• UEFI Boot: Configure UEFI boot options:
  • Auto - If the 1st boot HDD is GPT then enable UEFI boot options, otherwise disable.
  • Enabled - Enable all UEFI boot options.
  • Disabled - Disable all UEFI boot options.

• Boot Mode Select: Select boot mode Legacy/UEFI.
• Fixed Boot Order Priorities: Set boot order priorities.

CSM16 Parameters

CSM16 configurations. Enable/Disable, Option ROM, execution settings, etc.:

• GateA20 Active:
  • Upon request - GA20 can be disabled using BIOS services.
  • Always - do not allow disabling GA20. This option is useful when any RT code above 1 MB is executed.
• Option ROM Messages: Set display mode for option ROM.
• INT19 Trap Response: BIOS reaction on INT19 trapping by Option ROM:
  • Immediate - execute the trap right away.
  • Postponed - execute the trap during legacy boot.

CSM Parameters

OpROM execution, boot options, filter, etc.:

• Launch CSM: This options controls if CSM will be launched.
• Boot option filter: This option controls what devices system can boot to.
• Launch PXE OpROM policy: Controls the execution of UEFI and Legacy PXE OpROM.
• Launch Storage OpROM policy: Controls the execution of UEFI and Legacy storage OpROM.
• Launch Video OpROM policy: Controls the execution of UEFI and Legacy video OpROM.
• Other PCI device ROM priority: For PCI devices other than network, mass storage or video defines which OpROM to launch.
• Hard Drive BBS Priorities: Set the order of the legacy devices in this group.

Security

• Administrator Password: Set administrator password.
• User Password: Set user password.

Secure Boot Menu

Customize secure boot settings:

• Secure Boot: Secure boot can be enabled if:
  • System running in user mode with enrolled platform key (PK).
  • CSM function is disabled.
• Secure Boot Mode: Secure boot mode selector. Custom mode enables users to change image execution policy and manage secure boot keys.
• Key Management: Enables experienced users to modify secure boot variables.

Save & Exit

The exit screen provides options to save or discard changes before exiting BIOS.