how is it done?

\^?NetBSD 1.5 (router.kgl) #3: Sat Jun  2 00:41:18 CEST 2001
    root@wojtek.3miasto.net:/usr/src/sys/arch/i386/compile/router.kgl
cpu0: Intel 486DX (486-class)
total memory = 7808 KB
avail memory = 6400 KB
using 64 buffers containing 256 KB of memory
mainbus0 (root)
isa0 at mainbus0
ep0 at isa0 port 0x300-0x30f irq 10: 3Com 3C509 Ethernet
ep0: address 00:a0:24:8e:ba:76, 8KB byte-wide FIFO, 5:3 Rx:Tx split
ep0: 10baseT, 10base5, 10base2 (default 10base2)
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
wdc0 at isa0 port 0x1f0-0x1f7 irq 14
wd0 at wdc0 channel 0 drive 0: <Conner Peripherals 40MB - CP3046>
wd0: drive supports 64-sector pio transfers, chs addressing
wd0: 42120 KB, 1053 cyl, 2 head, 40 sec, 512 bytes/sect x 84240 sectors
npx0 at isa0 port 0xf0-0xff: using exception 16
pcprobe: reset error 1
pc0 at isa0 port 0x60-0x6f irq 1: color
pc0: console
biomask fbe5 netmask ffe5 ttymask ffe7
boot device: wd0
root on wd0a dumps on wd0b
IP Filter: v3.4.9 initialized.  Default = pass all, Logging = disabled
pc: timeout updating leds
pc: timeout updating leds
pc: timeout updating leds
syncing disks... 2 2 2 done
rebooting...
NetBSD 1.5 (router.kgl) #3: Sat Jun  2 00:41:18 CEST 2001
    root@wojtek.3miasto.net:/usr/src/sys/arch/i386/compile/router.kgl
cpu0: Intel 486DX (486-class)
total memory = 7808 KB
avail memory = 6400 KB
using 64 buffers containing 256 KB of memory
mainbus0 (root)
isa0 at mainbus0
ep0 at isa0 port 0x300-0x30f irq 10: 3Com 3C509 Ethernet
ep0: address 00:a0:24:8e:ba:76, 8KB byte-wide FIFO, 5:3 Rx:Tx split
ep0: 10baseT, 10base5, 10base2 (default 10base2)
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
wdc0 at isa0 port 0x1f0-0x1f7 irq 14
wd0 at wdc0 channel 0 drive 0: <Conner Peripherals 40MB - CP3046>
wd0: drive supports 64-sector pio transfers, chs addressing
wd0: 42120 KB, 1053 cyl, 2 head, 40 sec, 512 bytes/sect x 84240 sectors
npx0 at isa0 port 0xf0-0xff: using exception 16
pcprobe: reset error 1
pc0 at isa0 port 0x60-0x6f irq 1: color
pc0: console
biomask fbe5 netmask ffe5 ttymask ffe7
boot device: wd0
root on wd0a dumps on wd0b
IP Filter: v3.4.9 initialized.  Default = pass all, Logging = disabled
pc: timeout updating leds
pc: timeout updating leds