Re: looking for pinout on a scsi id changer

[alawther@spammenot.mac.com (Anthony Lawther)]

nyder <nyder.23@gmail.com> wrote:

> I have a sca to 50pin adaptor, and it has 4 sets of jumpers for ID
> (though i think it only needs 3 of them), and a manual saying what
> pins are for what.
> 
> I have this old APS Tech external SCSI box that I am mounting the
> drive into.
> 
> It has one of those ID changers on it that has the push button above
> and below the number.
> 0-6, and when you get to zero, you can't push the down button anymore,
> or when you get to 6, you can't push the up button anymore.
> 
> It has 4 pins off the back of it, which has 3 wires connecting to a
> small plug, and 1 wire connecting to a smaller plug.
> 
> Wondering if any knows the pinout of the id changer, or what it's
> called exactly so i can get a better search then I'm getting.
> 
> While I can just use a jumper to set it's ID "permantly" in the case,
> i'd rather get the ID changer working if possible.
> 
> I tried to take it out to see if i could find who made it, but I can't
> seem to figure out how to get it out, and don't want to break it.
> 
> okay, I did a bit more checking and it's a hompolt PF52 pushwheel
> switch or something along those lines.
> 
> 
> I figured the 4 lines are the C, and 1 , 2, 4 bits.
> 
> Not sure what the C is for.

C would be for common.

> 
> On the adaptor, there are 8 pairs for pins, normal jumper style
> 
> pins going from left pair to right pair:
> IDbit0, IDbit1, IDbit2, IDbit3, RMT-Start, Start delay, Sync, LED
> 
> On the ID switch:
> Blue Wire is C
> Brown Wire is 1 (bit0)
> Yellow Wire is 2 (bit1)
> Red Wire is 4 (bit 3)
> 
> Okay, it would seem obvious that the number wires go to one of the
> same number.  It's just the C (blue wire) i'm not sure about.  I would
> normally think that it would be the ground, or line to complete the ID
> circuit.  I don't know what kind of drive was in here before, but i'd
> have to make it span all 3 pins on one side of the adaptor if I am
> correct.

Yes, the single C wire would need to connect to one pin for each ID
jumper and then the individual bit wires to the other pins.

> 
> Anyways, anyone have any idea?
> 
> thanks

Regards,
Anthony.