Sam Latella wrote:
Hi, Is it possible to test an apple ii scsi card without a scsi hard drive attached? Example - Apple II have a self test mechanism built into the machines, does the apple scsi card have one too? The reason I would like to do this is that I don't have an external scsi drive yet, and the only scsi external device I do have is an Iomega Scsi ZIP 100 drive that is not terminated, anyway of making the ZIP drive terminated with an Apple II scsi card? The Zip 100 drive works great with the Ramfast Scsi card which if I recall correctly the ramfast card is terminated or the other way around? Any thoughts? Thanks for the help in advance. Sam
Hi, Sam!Let me pop in here; I'm sure the really knowledgeable people will speak up soon.
First of all, every SCSI Zip drive I've seen has two switches on the back; one to select ID 5 or 6, and one to terminate the drive or not. If it works with the RamFast card, you probably have it set for termination.
Every SCSI chain must be terminated at both ends. Usually it is built into the SCSI card and the operator must arrange for termination at the other end.
Are you perhaps thinking of term POWER? Beside the TERMINATION, the chain must be supplied with TERM POWER; 5 volts applied to one of the rats nest of wires. The RamFast does supply term power to the chain. I believe the Apple SCSI card does too, but the Apple High Speed SCSI does not, unless modified.
To get back to your key question; No, I can't think of any way to test the card (like a self test). You need to hook things up and see if they work.
Be glad to try to help you anyway I can. Rich