> >The two monitors are not really separate. They are both in one pair of
> >glasses, and have a common video input. There is a logic signal input to the
> >glasses that steers each frame to the correct eye.
>
>         H O W ? ? ?

I'm not sure what you are asking exactly, but here is my understanding of
the system:

It is a head-mounted display which has two displays.  One display is
completely visible by the left eye (and only the left eye) and the other
display is completely visibleby the right eye (and only the right eye).

The input signal is an NTSC composite video signal.  Internal to the HMD
this signal is processed -- "odd" frames are displayed on the right eye,
and "even" frames are dislayed on the left eye (NOTE: frames, not fields).
There is a "problem" with "bootstrapping" the system, that is making sure
that the correct frames are displayed on the right / left display.  To get
around this a toggle button is used (on the headmount) to switch between
the two possible frame -> display mappings.

As far as how it all works, I am guessing it does something along the
lines of looking for the vertical sync signal, and switches the current
display for each new frame.  Sort of the inverse of what I am trying to
do.

-Steve

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