Date: Sun, 14 Jun 2009 21:21:45 -0500 (CDT)
From: Doc <doc at vaxen.net>
Subject: Re: Classic mac fun (and some questions) (continued...)
Cameron Kaiser wrote:
It should
'just boot' into the Installer. The Happy Mac you briefly get
indicates that the Mac can see the disc, and the System Folder on it, so
the CD-ROM is undoubtedly working. I'm still thinking about RAM being a
problem, mind you, but your unit may just be plain broken if it's
throwing
bus errors.
Or the terminator is bad, or if it's external, he's using an Iomega
25->50-pin "SCSI" cable....
I would check along the lines that Doc suggested. Some times Apple's "bus
failure" means a SCSI bus failure.
Make sure that the SCSI chain is properly terminated. If you're using
internal and external devices, confirm that both ends are terminated
properly and neither end is double terminated. Check the SCSI IDs being
used by all devices on the chain.
Go ahead and just pull the SIMMs on the motherboard. There's 4 MB on the
logic board and that should be enough to boot from, or if it gets that
far, you'll get a message about lack of memory, which is further than
you're getting now. If that happens, hold down the shift key during boot
to not load extensions. That will often save enough memory to allow
booting in 4 MB.
I don't remember the beginning of this thread, but isn't there a suspicion
that the internal hard drive is malfunctioning? Disconnect the internal
hard drive completely, and only connect the CD-ROM drive. That will
simplify your SCSI chain, and eliminate electronic babbling from the hard
drive as a possibility.
So, basically, pull the RAM and all SCSI devices other than the CDROM,
make sure the CD-ROM drive is terminated and set to some ID other than 7
(SCSI ID 3 is traditional for CD-ROMs in a Mac) and try that. Also
double check the cable you're using and try a different one if the first
does not work.
Once you get a successful boot, you can try adding things back in.
Jeff Walther