Re: 2 questions

[JB <jbcole@ix.netcom.com>]

David Empson wrote:
> 
> JB <jbcole@ix.netcom.com> wrote:
> 
> > 2 questions:
> >
> > what exactly does the video overlay card do?
> 
> If you have a IIc, this is a moot point anyway.  :-)
> 
> A video overlay card takes an external video signal as input (e.g. from
> a video recorder or camera), and superimposes a computer-generated image
> on top of it (with transparent areas as appropriate).  The resulting
> image can then be sent out to a video recorder or monitor.  You can also
> connect a IIgs RGB monitor to it.
> 
> The most obvious application is for adding subtitles to a video.  You
> would need two VCRs (or a camera and VCR) to do this.  Another
> possibility is to display external video in a window, in a rather
> limited manner.
> 
> The overlay card is quite easy to use, because almost any software will
> work with it.  It works best with programs like HyperCard IIgs or
> HyperStudio, where the user has full control over the screen display.
> 
> A "key colour" can be selected using the software which controls the
> card: any areas displayed in this colour will be transparent, allowing
> the external video through.
> 
> The video overlay card can be used on a IIgs or an enhanced IIe.  It
> will not be quite as flexible on the IIe, because the video modes are
> more limited.
> 
> One interesting point to note, however: the video overlay card
> implements the IIgs graphics modes, so a IIe can generate Super Hi-res
> graphics displays if this card is installed.  I don't know if any
> software is able to take advantage of this.
> 
> > Can I use a IIgs monitor on a IIc?
> 
> Not with currently available hardware, but it is possible in theory if
> the correct interface was available.
> 
> --
> David Empson
> dempson@actrix.gen.nz
> Snail Mail: P.O. Box 27-103, Wellington, New Zealand

I have two IIgs' as well as a IIc.  thanks for the reply
-- 
HM3 (FMF) J.B. Cole, USNR-R
Naval Reservist and Apple IIgs user
http://pw2.netcom.com/~jbcole/jb.html
"The only easy day was yesterday"