<pre>
loadsplash=run spi_loadsplash
spi_loadsplash=sf probe; sf read ${splashimage} 0x800000 0xA00000 ${splashsize}
splashfile=splash_image.bmp
splashimage=0x20000002
splashsize=0x400000
loadsplashfile=tftpboot ${loadaddr} axel/${splashfile}
spi_updatesplash=sf probe; sf erase 0x800000 0xA00000 +${filesize}; sf write ${loadaddr} 0x800000 0xA00000 ${filesize}
</pre>