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  The current target platforms are Pine64, Raspberry Pi 3 and Opteron A1100.
  </p>
  
+ <p>
+ The Pine64 currently requires an image based on a non-redistributable
+ boot0 file from Allwinner to be installed on the system disk.
+ This will hopefully be resolved by a replacement in a future U-Boot
+ release.  The install media does not include these boot images or
+ a Pine64 device tree.
+ </p>
+ 
+ <p>
+ The Raspberry Pi 3 requires closed but redistributable files on the
+ system disk to load into the VC4 GPU which starts the ARM cores.
+ The boot ROM will only try to load these files off an SD card unless a
+ special config.txt value is set to irreversibly enable USB boot mode.
+ These files are present in the install media but there is no driver
+ for SD/MMC yet so a USB disk drive and manual steps are required.
+ </p>
+ 
+ <p>
+ Opteron A1100 machines on the other hand come with a UEFI firmware
+ that includes a device tree and can boot off SATA or USB devices without
+ board specific boot files on the system disk.
+ <p>
+ 
  <a name="hardware"></a>
  <h3><font color="#0000e0"><strong>Supported hardware</strong></font></h3>