制作RAMDISK in KERNEL的NetBSD

# Console Devices

# ISA console
#pc0 at isa? port 0x60 irq 1 # pccons generic PC console driver

# wscons
pckbc0 at isa? # pc keyboard controller
pckbd* at pckbc? # PC keyboard
#pms* at pckbc? # PS/2 mouse for wsmouse
vga0 at isa?
vga* at pci? dev ? function ?
pcdisplay0 at isa? # CGA, MDA, EGA, HGA
wsdisplay* at vga? console ?
wsdisplay* at pcdisplay? console ?
wskbd* at pckbd? console ?
#wsmouse* at pms? mux 0

pcppi0 at isa?
sysbeep0 at pcppi?

# Serial Devices

# PCI serial interfaces
com* at puc? port ? # 16x50s on "universal" comm boards
#cy* at pci? dev ? function ? # Cyclades Cyclom-Y serial boards

# ISA Plug-and-Play serial interfaces
com* at isapnp? # Modems and serial boards

# ISA serial interfaces
#options COM_HAYESP # adds Hayes ESP serial board support
com0 at isa? port 0x3f8 irq 4 # Standard PC serial ports
com1 at isa? port 0x2f8 irq 3
com2 at isa? port 0x3e8 irq 5
#com3 at isa? port 0x2e8 irq 9
#ast0 at isa? port 0x1a0 irq 5 # AST 4-port serial cards
#com* at ast? slave ?
#boca0 at isa? port 0x100 irq 5 # BOCA 8-port serial cards
#com* at boca? slave ?
#tcom0 at isa? port 0x100 irq 7 # TC-800 8-port serial cards
#com* at tcom? slave ?
#rtfps0 at isa? port 0x1230 irq 10 # RT 4-port serial cards
#com* at rtfps? slave ?
#cy0 at isa? iomem 0xd4000 irq 12 # Cyclades serial cards

# Miscellaneous mass storage devices

# Network Interfaces

# PCI network interfaces
fxp* at pci? dev ? function ? # Intel EtherExpress PRO 10+/100B
le* at pci? dev ? function ? # PCnet-PCI Ethernet
pcn* at pci? dev ? function ? # AMD PCnet-PCI Ethernet
rtk* at pci? dev ? function ? # Realtek 8129/8139

amhphy* at mii? phy ? # AMD 79c901 Ethernet PHYs
urlphy* at mii? phy ? # Realtek RTL8150L internal PHYs
ukphy* at mii? phy ? # generic unknown PHYs

# Pseudo-Devices

# disk/mass storage pseudo-devices
pseudo-device md 1 # memory disk device (ramdisk)
#pseudo-device vnd 4 # disk-like interface to files

# network pseudo-devices
pseudo-device bpfilter 8 # Berkeley packet filter
pseudo-device ipfilter # IP filter (firewall) and NAT
pseudo-device loop # network loopback
pseudo-device ppp 2 # Point-to-Point Protocol
pseudo-device pppoe 3

# miscellaneous pseudo-devices
pseudo-device pty 2 # pseudo-terminals (Sysinst needs two)
# wscons pseudo-devices
pseudo-device wsmux # mouse & keyboard multiplexor
#pseudo-device wsfont