Best to save these! :-)

These are the defaults that my TrimSlice development system arrived with:

setenv bootargs 'mem=384M@0M mem=512M@512M nvmem=128M@384M vmalloc=248M video=tegrafb console=ttyS0,115200n8 rw root=/dev/sda1 nohdparm rootwait'
run scan_boot

TrimSlice # printenv
bootargs=mem=384M@0M mem=512M@512M nvmem=128M@384M vmalloc=248M video=tegrafb console=ttyS0,115200n8 rw root=/dev/sda1 nohdparm rootwait
bootcmd=run scan_boot
bootdelay=3
baudrate=115200
autoload=n
bootfile=uImage
loadaddr=0x408000
stdin=serial,usbkbd
stdout=serial,lcd
stderr=serial,lcd
console=ttyS0,115200n8
mem=mem=384M@0M nvmem=128M@384M mem=512M@512M
smpflag=smp
videospec=tegrafb
boot_file=boot.scr
boot_file_load_cmd=source ${loadaddr};
start_bus=${interface} ${interface_init_cmd} ${bus};
scan_device=for i in / /boot/; do for j in fat ext2; do setenv prefix $i;setenv fs $j;echo Scanning ${fs} ${interface} ${device} on prefix ${prefix} ...;if ${fs}load ${interface} ${device} ${loadaddr} ${prefix}${boot_file}; then echo ${boot_file} found! Executing ...;run boot_file_load_cmd;fi;done;done;
scan_boot=setenv interface mmc; setenv interface_init_cmd init; setenv device 0; echo Scanning MMC card ...; setenv bus 0; run start_bus; run scan_device; setenv interface usb; setenv interface_init_cmd start; setenv device 0; echo Scanning USB key ...; setenv bus 0; run start_bus; run scan_device; setenv interface mmc; setenv interface_init_cmd init; setenv device 1; echo Scanning microSD card ...; setenv bus 1; run start_bus; run scan_device; setenv interface usb; setenv interface_init_cmd start; setenv device 0; echo Scanning SSD ...; setenv bus 1; run start_bus; run scan_device;
ethact=RTL8169#0
filesize=528
ipaddr=192.168.1.80
prefix=/
fs=ext2
interface=usb
interface_init_cmd=start
device=0
bus=1
serverip=192.168.1.1

Environment size: 1539/65532 bytes
TrimSlice #