FreeBSD will take advantage of Physical Address Extensions (PAE)support on CPUs that support this feature. A kernel with thePAE feature enabled will detect memory above 4gigabytes and allow it to be used by the system. This featureplaces constraints on the device drivers and other features ofFreeBSD which may be used; consult the pae(4) manual page for more details.
Most modern laptops (as well as many desktops) use the AdvancedConfiguration and Power Management (ACPI) standard. FreeBSDsupports ACPI via the ACPI Component Architecture referenceimplementation from Intel, as described in the acpi(4) manual page. The use of ACPI causes instabilities onsome machines and it may be necessary to disable the ACPI driver,which is normally loaded via a kernel module. This may beaccomplished by adding the following line to/boot/device.hints:
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Where possible, the drivers applicable to each device or classof devices is listed. If the driver in question has a manual pagein the FreeBSD base distribution (most should), it is referencedhere. Information on specific models of supported devices,controllers, etc. can be found in the manual pages.
The ahci driver also supports AHCI devices thatact as PCI bridges for nvme(4) using Intel Rapid Storage Technology(RST). To use the nvme(4) device, either one must set the SATA modein the BIOS to AHCI (from RST), or one must accept the performancewith RST enabled due to interrupt sharing. FreeBSD willautomatically detect AHCI devices with this extension that are inRST mode. When that happens, ahci will attachnvme(4) children to the ahci(4) device.
This driver also supports target mode for Fibre Channel cards.This support may be enabled by setting the desired role of the corevia the LSI Logic firmware utility that establishes what roles thecard can take on - no separate compilation is required.
With all supported SCSI controllers, full support is providedfor SCSI-I, SCSI-II, and SCSI-III peripherals, including harddisks, optical disks, tape drives (including DAT, 8mm Exabyte,Mammoth, and DLT), medium changers, processor target devices andCD-ROM drives. WORM devices that support CD-ROM commands aresupported for read-only access by the CD-ROM drivers (such ascd(4)). WORM/CD-R/CD-RW writing support is provided by cdrecord(1), which is a part of the sysutils/cdrtoolsport in the Ports Collection.
The em driver supports Gigabit Ethernetadapters based on the Intel 82540, 82541ER, 82541PI, 82542, 82543,82544, 82545, 82546, 82546EB, 82546GB, 82547, 82571, 82572, 82573,82574, 82575, 82576, and 82580 controller chips:
Most adapters in the Intel Ethernet 700 Series withSFP+/SFP28/QSFP+ cages have firmware that requires that Intelqualified modules are used; these qualified modules are listedbelow. This qualification check cannot be disabled by thedriver.
The sis driver supports Silicon IntegratedSystems SiS 900 and SiS 7016 based Fast Ethernet adapters andembedded controllers, as well as Fast Ethernet adapters based onthe National Semiconductor DP83815 (MacPhyter) and DP83816 chips.Supported adapters include:
[amd64, i386] Lucent Technologies WaveLAN/IEEE 802.11b wirelessnetwork adapters and workalikes using the Lucent Hermes, IntersilPRISM-II, Intersil PRISM-2.5, Intersil Prism-3, and SymbolSpectrum24 chipsets (wi(4)driver)
The snd\_hda driver supports more than twohundred different controllers and CODECs. There is no sense to listall of them here, as in most cases specific CODEC configuration andwiring are more important then type of the CODEC itself. 2ff7e9595c
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