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      1 Some Amigas are incapable of booting from partition utilizing a bootblock.  One
      2 example is the PPS Zeus accelerator.  The Zeus has two major problems with
      3 booting from a bootblock.  The first (and fatal) one is the driver is just
      4 plain buggy and will not work.  The second problem (if the first problem
      5 didn't exist) is that the Zeus memory is normally configured during the
      6 execution of S:Startup-Sequence using a supplied utility program.  Even if
      7 the Zeus would boot from a bootblock, its memory would not get configured.
      8 Another example I've run into is the GVP GForce-40.  It will boot from a
      9 bootblock, but it appears to only work if there is a filesystem in the RDB
     10 blocks for the bootable partition.  I've gotten the GForce-40 to boot directly
     11 from the bootblock by installing the BFFSFastFileSystem in the RDB.
     12 
     13 When I was developing the two-stage boot for NetBSD, I wrote runbootblock.
     14 Runbootblock will load and execute an Amiga bootblock program from a disk partition,
     15 similar to the process the Amiga ROM will do when booting from the bootblock.
     16 This allows "booting" from a NetBSD bootblock when the Amiga is unable to actually
     17 boot from a bootblock.
     18 
     19 runbootblock [-d PPSscsi2.device] [-u 1] [-p root]
     20 
     21     -d scsi.device	Select device driver name, default PPSSscsi2.device.
     22     -u unit		Select SCSI device unit, default 1.
     23     -p partition	Select partition name, default is root partition.
     24 
     25 The following command will load and execute the bootblock on SCSI drive
     26 2 from the partition named "swap" (which contains the miniroot filesystem
     27 for installing/upgrading NetBSD) on my Zeus.
     28 
     29 	runbootblock -u 2 -p swap
     30