=========================================================================== $NetBSD: MESSAGE,v 1.4 2022/02/11 22:06:23 mrg Exp $ Example command to install U-Boot to an empty eMMC or SD card: # dd if=${LOCALBASE}/share/u-boot/rockpro64/rksd_loader.img seek=64 of=/dev/rld0d conv=sync Alternatively, to install to SPI flash: dd if=${LOCALBASE}/share/u-boot/rockpro64/rkspi_loader.img bs=64k of=/dev/spiflash0 conv=sync You should make sure that the space is otherwise cleared of data, as old images may fool the boot loader paths. See also NetBSD installboot(8) and http://opensource.rock-chips.com/wiki_Boot_option ===========================================================================