[comp.sys.mac] MAC-SE genlock

paleo@ecsvax.uncecs.edu (Dr. Constantine A. LaPasha) (09/04/88)

Does anyone know if there is a way to get to MAC-SE screen graphics
genlocked to an external NTSC video signal (B&W)?  Either of 2
posibilities come to mind... pull out the MAC display signal, 
changing it to composite video (NTSC) and using a genlock to merge
the mac screen with another video source to an external monitor...
or genlock the external source and the mac screen on the mac.

I would think the former would be more practical, but I'm not
even sure if either can be done.  Does anyone know if this can
be done at all? - if so, HOW??

Greatly appreciate any help.  I would also appreciate hearing
that this cannot be done, if such is the case, so I don't waste
too much time with it.

-- 
Kostya LaPasha        paleo@uncecs.edu   or   paleo@ecsvax.uncecs.edu
- comments, opinions, etc. are mine NOT those of NCSU -

paul@aucs.UUCP (Paul Steele) (09/06/88)

I seem to recall that Comtrex had a video camera that could film directly
off the screen of a Mac Plus/SE that came with an optional genlock device.
The scan rate of the camera was matched to that of the Mac so there wouldn't
be any video lines.
-- 
Paul H. Steele      USENET:   {uunet|watmath|utai|garfield}!dalcs!aucs!Paul
Acadia University   BITNET:   Paul@Acadia
Wolfville, NS       Internet: Paul%Acadia.BITNET@CUNYVM.CUNY.EDU
CANADA  B0P 1X0     (902) 542-2201x587

paleo@ecsvax.uncecs.edu (Dr. Constantine A. LaPasha) (09/08/88)

In article <1243@aucs.UUCP>, paul@aucs.UUCP (Paul Steele) writes:
> I seem to recall that Comtrex had a video camera that could film directly
> off the screen of a Mac Plus/SE that came with an optional genlock device.
<...some stuff omitted...>
> Paul H. Steele      USENET:   {uunet|watmath|utai|garfield}!dalcs!aucs!Paul
> Acadia University   BITNET:   Paul@Acadia
> Wolfville, NS       Internet: Paul%Acadia.BITNET@CUNYVM.CUNY.EDU
> CANADA  B0P 1X0     (902) 542-2201x587



OK, I'll bite - do you have a contact for the company, and/or
any product description?  Were they getting the mac scree signal
from inside the mac or were they pointing the camera at the
mac screen to get the video signal?  Any idea as to what
kind of output signal this thing puts out?

Info or possible pointers greatly appreciated.   Thanks.

-- 
Kostya LaPasha        paleo@uncecs.edu   or   paleo@ecsvax.uncecs.edu
- comments, opinions, etc. are mine NOT those of NCSU -