Thanks Will,
After much head banging (and pictures from Jeff) I think I have it.

> Will S wrote:
> The Apple and Clone machines (9600 etc and S900/J700) that come as
> all SCSI come from the factory with termination enabled on the SCSI
> drive.

I bought the 9600 used, so who knows what might have been changed.  But, 
an original (Apple labeled) 4 GB drive was in it.  It had no termination 
jumpers on it.  I suspect it worked in the 9600, as Jeff said, because 
of SCSI voodoo, and worked in the c600 because it was not terminated.

> External SCSI the last device in the chain needs termination.

That I had no problems with.

> The C600/500 comes from the factory with termination on the SCSI
> CDrom player and no terminations should be used elsewhere on this
> machine.

We replaced our CD with an Apple ROM version.  And yes, it is terminated.

> It took me forever to figure this out.

I was slow on the uptake because I kept thinking the Motherboard was 
making its termination at one end of the chain.  No matter how I added 
it up I was getting three ends to the SCSI chain: motherboard, end of 
internal cable, and last external device.

With the motherboard (self-detecting) in the middle of the chain I 
understand.

Nancy


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