Re: Q: What is //c RGB port for?

[dempson@actrix.gen.nz (David Empson)]

The IIc does not have an "RGB port".  The 15-pin port is a "video
expansion" port.  It is an unlucky coincidence (aka design flaw) that it
looks the same as the RGB video connector on an Apple ///, IIgs or Mac.

The IIc video expansion port provides several internal signals which
allow a plug-in device to generate an appropriate video signal.  You
need an adaptor in most cases.

Lazarus I. Long <lazarus.long@adobe.com> wrote:

> When all you do is plug in the "RGB to Composite" converter
> to hook it to your TV?

Why would you need an RGB to Composite converter when the IIc already
has a composite video output?

> Can I hook a IIgs RGB monitor directly to it? 

No.  You need an adpator which generates the appropriate flavour of RGB:
analog RGB, not digital.  Digital RGB is much more common on the IIe,
and I think that digital RGB adaptors for the IIc are also more common
(analog RGB didn't become popular until a couple of years after the
release of the IIc).  The Apple /// also has a digital RGB port.

> What *can* I  hook directly to it?

The IIc LCD screen plugs directly into the video expansion port.  There
may be other devices, but that is the only one I know of.

-- 
David Empson
dempson@actrix.gen.nz
Snail Mail: P.O. Box 27-103, Wellington, New Zealand