Apple SCSI

[Alexey Toptygin]

On Sun, 3 Sep 2006, Don wrote:

>>> E.g., how much grief can I expect going *through* the slide
>>> scanner with DB25 coming in and Centronics going out?
>> 
>> I'm not sure that you even _can_ do this without seeing some detailed 
>> technical info on the scanner.
>
> Scanner has DB25 and Centronics connectors.  Obviously, an attempt
> to be compatible with a variety of different applications.
> They are no doubt wired AS IF they were two "identical" connectors
> with the scanner itself sitting *logically* between them (though
> I have seen this PHYSICALLY violated so often on SCSI devices
> that I wouldn't make any bets on it!).
>
> So, it *suggests* running *into* the slide scanner on one connector
> and *out* (to the next downstream device) on the *other* connector.
> (scanners often only have a single connector which makes putting
> more than one on a given SCSI chain a bit of a chore)

Which won't work unless you can disable termination in the scanner, right? 
If the scanner was designed to only ever use one of the connectors (always 
be at the end of a chain) and not require external termination, that might 
not be possible...

 			Alexey