了解NetBSD

　　NetBSD device drivers

　　NetBSD's machine-independent driver framework is a unique method of handling device drivers, and it's crucial for simple and quick ports. In most operating systems, a device driver is specific to a piece of hardware (video card, network interface card (NIC), and so on), bus (such as Peripheral Component Interconnect (PCI), Industry Standard Architecture (ISA), Universal Serial Bus (USB)), and platform (i386, 68k, PowerPC®, and so on). In NetBSD, device drivers are written to extend across multiple buses and multiple platforms, enabling developers to include addenda to the device driver's code to add compatibility to a new setup rather than writing a whole new driver. This is a huge shift from the typical operating system device driver paradigm that helps in overcoming one of the biggest stumbling blocks for operating system developers, system administrators, and component manufactures.

　　File system support

　　NetBSD, again encouraging portability and interoperability, includes support for many different file systems. Berkeley Fast File System (FFS) is the default choice, with support in 32-bit and 64-bit configurations. Other major file systems that NetBSD supports include the Linux ext2 and the Windows NTFS and FAT32 file systems. The standard CD file system, International Standards Organization (ISO) 9660, is also supported, with both Rockridge and Joliet extensions.