That is essentially what I did, but I had attempted to make one partition on the drive by formatting the whole thing. I think I went FAT32. I'm still amazed at what I found on the drive after the copy.xeno74 wrote: You only need to copy the image with 'dd' to a partition on your USB flash drive.
OK, this is obviously where I went wrong. I should be able to fix the flash easily enough, but I don't know where to get the dtb file and the kernel. My misunderstanding was that they were included in the .img.Create two partitions on your USB flash drive. A small FAT16 boot partition and a big partition without a file system. Copy the dtb file and the Linux kernel to the first small FAT16 boot partition. After that copy the MATE PowerPC Remix img with 'dd' to the second big partition.
I guess an up-to-date kernel is easy enough to find, but I haven't noticed any dtb files being offered for test runs.
Maybe I'm supposed to use the same old cyrus_5020.dtb?