Fairlight-CMI

Thanks to everybody that responded and gave me useful information.
Unfortunately I have to realize that my light pen isn't working anymore.

So, no page 4 or page 6 joy for me.

Best,
David
http://dvdborn.blogspot.com


--- In Fairlight-CMI@yahoogroups.com, "tootith" <duemachine@...> wrote:
>
> Hi David, Peter Wielk helped me out with this exact same issue several
> years ago. I dug through my emails and found this:
> 
> "Regarding the light pen, as an overview, the pen requires 5 volts
> from the monitor power supply for its internal electronics, then there
> are two logic signals, hit and touch which are output by the pen and
> pass straight through the monitor into the CMI mainframe where they
> feed into the graphics card (Q219 from memory).
> 
> The wiring is as follows: Black earth, Red +5V, then green and white
> are hit and touch, but the manual doesn't say which is which! However
> touch should appear on pin 3 of the 5-pin graphics output XLR on the
> back of the monitor whilst "hit" should appear on pin 1."
> 
> If I remember right, the IIx at my college ended up wired as follows:
> 
> Red to Purple +5v
> Black to Black (ground)
> Green to White (pin 1)
> White to Grey (pin 3)
> 
> Regards,
> Fred Duey
> 
> 
> 
> --- In Fairlight-CMI@yahoogroups.com, "dvdborn" <dvdborn@> wrote:
> >
> > I'm still trying to find out how I need to connect my light pen back
> to the monitor on a IIx.
> > 
> > If someone could tell me which voltages they measure on the
> connections points of the light 
> > pen connector on the monitor, I can figure out how to connect them.
> > 
> > Would anyone be so kind to measure this for me?
> > 
> > There are 4 pins that should output some voltages. Two pins should
> read about +1,94V, and 
> > one is +5V and the other one is -0,01 volt. I used the ground
> connector on the inside of the 
> > panel of the Mainframe unit as my other connection point while
> measuring.
> > 
> > David
> > http://dvdborn.blogspot.com
> >
>