device                   isa
device                   pci

# Floppy drives
device                   fdc0 at     isa?    port IO_FD1    irq 6   drq 2
device                   fd0   at     fdc0   drive 0

# atkbdc0 controls both the keyboard and the PS/2 mouse
device                   atkbdc0   at    isa?   port   IO_KBD
device                   atkbd0     at   atkbdc?   irq 1   flags 0x1

device                   vga0        at    isa?

# syscons is the default console driver, resembling an SCO console
device                    sc0         at    isa?   flags 0x100

# Floating point support - do not disable.
device                   npx0        at    nexus?   port IO_NPX   irq 13

# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
device                    miibus       # MII bus support
device                    fxp            # Intel EtherExpress PRO/100B (82557, 82558)
device                    rl               # RealTek 8129/8139
device                    xl              # 3Com 3c90x
device                    lnc0       at     isa?   port 0x280   irq 10   drq 0            # VMware Nic

# Pseudo devices - the number indicates how many units to allocate.
pseudo-device                    loop            # Network loopback
pseudo-device                    ether          # Ethernet support
pseudo-device                    md             # Memory "disks"

上面的内核基本上是一个系统要运行的最小配制了，当然如果你的机器不同具体也不同，大家按自己的情况来定，我的机器配制是：
CPU: Pentium III 733Mhz
MotherBoard: Via 693A Chipset
NIC: Realtek 8139c
当配制好之后就是编译内核了，建议大家使用config的方式来编译，注意，最后不要使用make install，否则你原来的内核会被替换。