Re: Chinook hard disk questions

[tdiaz@coyote.csusm.edu (Tony Diaz)]

Randy Shackelford (shack@crash.cts.com) wrote:
> replacements were available. So the question is, can I repair either the old
> power supply or the current one? Or can I simply run a wire from the 5 volt
> output on the supply to the appropriate pin on the DB25 connector to get
> terminator power? Which pin would it be?


You can ad trmpwr to the Apple High Speed SCSI Card by adding a current flow
blocking diode (IN4001 or 914 type) from the positive side of C34 (22uf/16V)
to what becomes pin 25 of the DB25 connector. With the SCSI card flat on the 
table, ribbon cable facing to the left, edge connector toward you, this would
be the second pin from the bottom on the left (outer row of pins). If counting
the berg strip per proper pinout that would be pin #24.

You can add a wire without the diode for a sort term fix (term fix, hmmm)
but the diode should be in place for the job to be done right. You can either
loop the diode around the cap lead and then run it through the tooling hole by
pin 25 in the edge connector or do the whole thing on the back. A little heat
shrink tubing will make it look nice too :)

> Second question: I have a superdrive card with one HD drive and one 800K drive
> connected. Is it ok to connect the CT-20c to the drive chain or should I use
> the normal floppy port?


I have plugged the ProAPP 20 meg I have into just about everything with a
smartport in the past. I have also used the CT-20c on the older Liron 3.5"
card without any problems. Infact, I have also used the ProAPP on the
SuperDrive Controller card. 

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