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