Re: VR4 HMD output

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Erik Brisson (ebrisson++at++lobster.bu.edu)
Tue, 12 Jan 99 22:32:07 EST

I use the following to drive our Virtual Research V6 and display one eye's view
on a separate monitor, and suspect it will work for the VR4.

Use /usr/gfx/setmon -S 4++at++640x480_60. Connect two of the 640x480 outputs
from the MCO to the V6 electronics unit. Connect the video output from the
V6 electronics unit to a PC monitor.

Erik Brisson
ebrisson++at++bu.edu

>
>Hi,
>
>This is definitely not a Performer-specific question, but I might hope some
>around here have the answer.
>
>I'm using Virtual Research Inc.'s VR4 HMD for an output of my pfProgram. This
>HMD only accepts 640x480 *interlaced* format. The only compliant MCO mode I
>found on our Onyx RE2 is 2++at++640x486_30i. However we'd like to be able to fork one
>of the left-and-right channels onto a desktop screen or a TV.
>
>I have tried everything :
>- forking one of the the 3-cable RGB output from the MCO board
>- using the SVGA output socket of the VR4's box
>
>on many types of screen, among which :
>- SGI screen (Onyx or Indys)
>- some PC screens
>- a TV through a seem-to-be VGA->PAL converter or RGB->PAL converter (actually
>an esoteric box with Harmonic Research Inc. logo on it)
>
>Nothing worked, I cannot get any readable signal...
>
>I'm presuming this may come from the interlaced nature of the video signal,
>which does not seem to be compliant to any of the video displays I've tried,
>except the HMD.
>
>Does any of you have an advice to give me about which screen, converter, or even
>MCO mode I could try to be able to visualize the HMD images on a desktop ?
>
>I hope I was not to ununderstandable in my question :)
>
>Tnx,
>
>Mike
>
>--
>Michael Boccara | boccara++at++mit.edu | (617) 253 0005
>Massachusetts Institute of Technology
>Virtual Environment Technologies for Training
>http://www.mit.edu/~boccara
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