At 3:52 PM +0200 10/21/00, Havard Eidnes wrote:

:)as reported earlier, my 7600 macppc can no longer boot from the
:)NetBSD SCSI drive after my G3 processor upgrade (I wish I knew why
:)-- all it says is "RESETint SCSI bus" followd by "can't OPEN:
:)scsi-int/sd@1:0")

Did you see my post a few days ago about a G3 upgrade in my 7500?
Depending on the brand of G3 upgrade, it might or might not turn of
speculative processing in OF (some early versions of G3 upgrades required
MacOS to load an extension before it was turned off).  Try downgrading to a
604 and see if you still can't boot.

:)So, today I tried to boot via the network, and I'm encountering
:)some of the lossage that's been reported earlier on this list.
:)
:)I have bootp, tftpd and NFS set up, and I can boot the ofwboot.xcf
:)(from the Oct 20 snapshot) file just fine using:
[...]
:)which looks depressingly similar to what others have reported
:)earlier.  A tcpdump of the mac's ethernet address on the boot server
:)(a hp300) shows:

Yes, this is almost identical behavior to what I've seen with my G3
upgraded 7500.  The one thing I didn't try was (again) downgrading to a
604.  Right now, I don't have access to a netboot server so I can't try
this.

As I understand it, speculative processing means that the G3 executes
instructions before it is certain that they will be necessary.  This
becomes a problem with older devices (such as SCSI controllers, video, and
network) when their state changes when information is read from them.
Perhaps mc0 is getting corrupted from this?

Good luck,
  -- MW